May 2022 - Linux-stable-mirror

cache_from_obj: Wrong slab cache. Acpi-Namespace but object is from kmalloc-64

by Jason A. Donenfeld

Hi Rafael, I'm seeing the following boot time splat on 5.4.191: [ 0.700848] ACPI: Unable to load the System Description Tables [ 0.701622] ACPI Error: Could not remove SCI handler (20190816/evmisc-247) [ 0.702871] ------------[ cut here ]------------ [ 0.703503] cache_from_obj: Wrong slab cache. Acpi-Namespace but object is from kmalloc-64 [ 0.704609] WARNING: CPU: 0 PID: 1 at mm/slab.h:521 kmem_cache_free+0x22a/0x240 [ 0.705356] Kernel panic - not syncing: panic_on_warn set ... [ 0.705769] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.191-debug #1 [ 0.705769] Call Trace: [ 0.705769] dump_stack+0x97/0xd3 [ 0.705769] panic+0x289/0x50b [ 0.705769] ? get_mm_exe_file.cold+0x3e/0x3e [ 0.705769] ? printk+0x91/0xad [ 0.705769] ? kmem_cache_free+0x22a/0x240 [ 0.705769] __warn.cold+0x1b/0x35 [ 0.705769] ? ist_end_non_atomic+0x10/0x10 [ 0.705769] ? kmem_cache_free+0x22a/0x240 [ 0.705769] report_bug+0x1e6/0x250 [ 0.705769] do_error_trap+0x14a/0x1e0 [ 0.705769] ? kmem_cache_free+0x22a/0x240 [ 0.705769] do_invalid_op+0x49/0x60 [ 0.705769] ? kmem_cache_free+0x22a/0x240 [ 0.705769] invalid_op+0x20/0x30 [ 0.705769] RIP: 0010:kmem_cache_free+0x22a/0x240 [ 0.705769] Code: f5 83 82 e8 3a 61 7b 00 48 8b 4d 50 49 8b 55 50 48 c7 c6 50 62 29 82 48 c7 c7 b8 e7 40 82 c6 05 b3 2c 60 01 01 e8 34 66 79 00 <0f> 0b eb ab e9 5a 08 7b 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 [ 0.705769] RSP: 0000:ffff888000327c20 EFLAGS: 00010286 [ 0.705769] RAX: 0000000000000000 RBX: ffff888080258440 RCX: 0000000000000000 [ 0.705769] RDX: 0000000000000001 RSI: 0000000000000006 RDI: ffffed1000064f7a [ 0.705769] RBP: ffff888000087740 R08: 0000000000000000 R09: 0000000000000000 [ 0.705769] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 0.705769] R13: ffff88800008d640 R14: ffff888000258440 R15: dffffc0000000000 [ 0.705769] acpi_os_release_object+0x5/0x10 [ 0.705769] acpi_ns_delete_children+0xa8/0xdd [ 0.705769] acpi_ns_delete_namespace_subtree+0x84/0xbf [ 0.705769] ? acpi_bus_init+0x3cf/0x3cf [ 0.705769] acpi_ns_terminate+0x32/0x7d [ 0.705769] acpi_ut_subsystem_shutdown+0xb2/0x1b8 [ 0.705769] ? acpi_bus_init+0x3cf/0x3cf [ 0.705769] acpi_terminate+0x5/0xf [ 0.705769] acpi_bus_init+0x39b/0x3cf [ 0.705769] ? acpi_sleep_init+0x1c2/0x1c2 [ 0.705769] ? kasan_unpoison_shadow+0x34/0x40 [ 0.705769] ? kobject_create_and_add+0x68/0x90 [ 0.705769] ? acpi_bus_init+0x3cf/0x3cf [ 0.705769] acpi_init+0xf5/0x227 [ 0.705769] ? acpi_bus_init+0x3cf/0x3cf [ 0.705769] ? trace_initcall_start+0xf7/0x12f [ 0.705769] ? acpi_bus_init+0x3cf/0x3cf [ 0.705769] do_one_initcall+0x71/0x12d [ 0.705769] ? start_kernel+0x5c4/0x5c4 [ 0.705769] ? rcu_read_lock_sched_held+0xf0/0x160 [ 0.705769] ? trace_initcall_level+0xf7/0x12f [ 0.705769] kernel_init_freeable+0x407/0x4ab [ 0.705769] ? rest_init+0x322/0x322 [ 0.705769] kernel_init+0x8/0x11e [ 0.705769] ret_from_fork+0x24/0x30 [ 0.705769] ACPI MEMORY or I/O RESET_REG. This was generated with the below config file and this QEMU command line: qemu-system-x86_64 \ -nodefaults \ -nographic \ -smp 4 \ -cpu host -machine q35,accel=kvm \ -m 1G \ -serial stdio \ -chardev file,path=/home/wgci/tmp/176591.3184/tmp.Gq9dNdQzi3/src/tests/qemu/../../../qemu-build/x86_64/result,id=result \ -serial chardev:result \ -no-reboot \ -monitor none \ -kernel path/to/kernel Jason # # Automatically generated file; DO NOT EDIT. # Linux/x86_64 5.4.191-debug Kernel Configuration # # # Compiler: gcc (Gentoo 11.3.0 p4) 11.3.0 # CONFIG_CC_IS_GCC=y CONFIG_GCC_VERSION=110300 CONFIG_CLANG_VERSION=0 CONFIG_CC_CAN_LINK=y CONFIG_CC_HAS_ASM_GOTO=y CONFIG_CC_HAS_ASM_INLINE=y CONFIG_CONSTRUCTORS=y CONFIG_IRQ_WORK=y CONFIG_BUILDTIME_EXTABLE_SORT=y CONFIG_THREAD_INFO_IN_TASK=y # # General setup # CONFIG_INIT_ENV_ARG_LIMIT=32 # CONFIG_COMPILE_TEST is not set CONFIG_LOCALVERSION="" # CONFIG_LOCALVERSION_AUTO is not set CONFIG_BUILD_SALT="" CONFIG_HAVE_KERNEL_GZIP=y CONFIG_HAVE_KERNEL_BZIP2=y CONFIG_HAVE_KERNEL_LZMA=y CONFIG_HAVE_KERNEL_XZ=y CONFIG_HAVE_KERNEL_LZO=y CONFIG_HAVE_KERNEL_LZ4=y CONFIG_KERNEL_GZIP=y # CONFIG_KERNEL_BZIP2 is not set # CONFIG_KERNEL_LZMA is not set # CONFIG_KERNEL_XZ is not set # CONFIG_KERNEL_LZO is not set # CONFIG_KERNEL_LZ4 is not set CONFIG_DEFAULT_HOSTNAME="(none)" # CONFIG_SYSVIPC is not set # CONFIG_POSIX_MQUEUE is not set # CONFIG_CROSS_MEMORY_ATTACH is not set # CONFIG_USELIB is not set # CONFIG_AUDIT is not set CONFIG_HAVE_ARCH_AUDITSYSCALL=y # # IRQ subsystem # CONFIG_GENERIC_IRQ_PROBE=y CONFIG_GENERIC_IRQ_SHOW=y CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y CONFIG_GENERIC_PENDING_IRQ=y CONFIG_GENERIC_IRQ_MIGRATION=y CONFIG_IRQ_DOMAIN=y CONFIG_IRQ_DOMAIN_HIERARCHY=y CONFIG_GENERIC_IRQ_MATRIX_ALLOCATOR=y CONFIG_GENERIC_IRQ_RESERVATION_MODE=y CONFIG_IRQ_FORCED_THREADING=y CONFIG_SPARSE_IRQ=y # CONFIG_GENERIC_IRQ_DEBUGFS is not set # end of IRQ subsystem CONFIG_CLOCKSOURCE_WATCHDOG=y CONFIG_ARCH_CLOCKSOURCE_DATA=y CONFIG_ARCH_CLOCKSOURCE_INIT=y CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE=y CONFIG_GENERIC_TIME_VSYSCALL=y CONFIG_GENERIC_CLOCKEVENTS=y CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=y CONFIG_GENERIC_CMOS_UPDATE=y # # Timers subsystem # CONFIG_TICK_ONESHOT=y CONFIG_NO_HZ_COMMON=y # CONFIG_HZ_PERIODIC is not set CONFIG_NO_HZ_IDLE=y # CONFIG_NO_HZ_FULL is not set CONFIG_NO_HZ=y CONFIG_HIGH_RES_TIMERS=y # end of Timers subsystem # CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set CONFIG_PREEMPT=y CONFIG_PREEMPT_COUNT=y CONFIG_PREEMPTION=y # # CPU/Task time and stats accounting # CONFIG_TICK_CPU_ACCOUNTING=y # CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set # CONFIG_IRQ_TIME_ACCOUNTING is not set # CONFIG_BSD_PROCESS_ACCT is not set # CONFIG_TASKSTATS is not set # CONFIG_PSI is not set # end of CPU/Task time and stats accounting # CONFIG_CPU_ISOLATION is not set # # RCU Subsystem # CONFIG_PREEMPT_RCU=y # CONFIG_RCU_EXPERT is not set CONFIG_SRCU=y CONFIG_TREE_SRCU=y CONFIG_TASKS_RCU=y CONFIG_RCU_STALL_COMMON=y CONFIG_RCU_NEED_SEGCBLIST=y # end of RCU Subsystem # CONFIG_IKCONFIG is not set # CONFIG_IKHEADERS is not set CONFIG_LOG_BUF_SHIFT=18 CONFIG_LOG_CPU_MAX_BUF_SHIFT=12 CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13 CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y # # Scheduler features # # end of Scheduler features CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH=y CONFIG_ARCH_SUPPORTS_INT128=y # CONFIG_CGROUPS is not set CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_USER_NS is not set # CONFIG_PID_NS is not set CONFIG_NET_NS=y # CONFIG_CHECKPOINT_RESTORE is not set # CONFIG_SCHED_AUTOGROUP is not set # CONFIG_SYSFS_DEPRECATED is not set # CONFIG_RELAY is not set CONFIG_BLK_DEV_INITRD=y CONFIG_INITRAMFS_SOURCE="/home/zx2c4/Projects/wireguard-linux-compat/src/tests/qemu/../../../qemu-build/x86_64/init-cpio-spec.txt" CONFIG_INITRAMFS_ROOT_UID=0 CONFIG_INITRAMFS_ROOT_GID=0 # CONFIG_RD_GZIP is not set # CONFIG_RD_BZIP2 is not set # CONFIG_RD_LZMA is not set # CONFIG_RD_XZ is not set # CONFIG_RD_LZO is not set # CONFIG_RD_LZ4 is not set CONFIG_INITRAMFS_COMPRESSION="" CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set CONFIG_SYSCTL=y CONFIG_SYSCTL_EXCEPTION_TRACE=y CONFIG_HAVE_PCSPKR_PLATFORM=y CONFIG_BPF=y CONFIG_EXPERT=y CONFIG_MULTIUSER=y # CONFIG_SGETMASK_SYSCALL is not set # CONFIG_SYSFS_SYSCALL is not set # CONFIG_SYSCTL_SYSCALL is not set # CONFIG_FHANDLE is not set CONFIG_POSIX_TIMERS=y CONFIG_PRINTK=y CONFIG_PRINTK_NMI=y CONFIG_BUG=y # CONFIG_PCSPKR_PLATFORM is not set CONFIG_BASE_FULL=y CONFIG_FUTEX=y CONFIG_FUTEX_PI=y # CONFIG_EPOLL is not set # CONFIG_SIGNALFD is not set # CONFIG_TIMERFD is not set # CONFIG_EVENTFD is not set CONFIG_SHMEM=y # CONFIG_AIO is not set # CONFIG_IO_URING is not set # CONFIG_ADVISE_SYSCALLS is not set # CONFIG_MEMBARRIER is not set CONFIG_KALLSYMS=y CONFIG_KALLSYMS_ALL=y CONFIG_KALLSYMS_ABSOLUTE_PERCPU=y CONFIG_KALLSYMS_BASE_RELATIVE=y # CONFIG_BPF_SYSCALL is not set # CONFIG_USERFAULTFD is not set CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y # CONFIG_RSEQ is not set # CONFIG_EMBEDDED is not set CONFIG_HAVE_PERF_EVENTS=y # CONFIG_PC104 is not set # # Kernel Performance Events And Counters # CONFIG_PERF_EVENTS=y # CONFIG_DEBUG_PERF_USE_VMALLOC is not set # end of Kernel Performance Events And Counters # CONFIG_VM_EVENT_COUNTERS is not set CONFIG_SLUB_DEBUG=y # CONFIG_COMPAT_BRK is not set # CONFIG_SLAB is not set CONFIG_SLUB=y # CONFIG_SLOB is not set # CONFIG_SLAB_MERGE_DEFAULT is not set # CONFIG_SLAB_FREELIST_RANDOM is not set # CONFIG_SLAB_FREELIST_HARDENED is not set # CONFIG_SHUFFLE_PAGE_ALLOCATOR is not set # CONFIG_SLUB_CPU_PARTIAL is not set # CONFIG_PROFILING is not set CONFIG_TRACEPOINTS=y # end of General setup CONFIG_64BIT=y CONFIG_X86_64=y CONFIG_X86=y CONFIG_INSTRUCTION_DECODER=y CONFIG_OUTPUT_FORMAT="elf64-x86-64" CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig" CONFIG_LOCKDEP_SUPPORT=y CONFIG_STACKTRACE_SUPPORT=y CONFIG_MMU=y CONFIG_ARCH_MMAP_RND_BITS_MIN=28 CONFIG_ARCH_MMAP_RND_BITS_MAX=32 CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=8 CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=16 CONFIG_GENERIC_BUG=y CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_ARCH_HAS_CPU_RELAX=y CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y CONFIG_ARCH_HAS_FILTER_PGPROT=y CONFIG_HAVE_SETUP_PER_CPU_AREA=y CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y CONFIG_ARCH_HIBERNATION_POSSIBLE=y CONFIG_ARCH_SUSPEND_POSSIBLE=y CONFIG_ARCH_WANT_GENERAL_HUGETLB=y CONFIG_ZONE_DMA32=y CONFIG_AUDIT_ARCH=y CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y CONFIG_KASAN_SHADOW_OFFSET=0xdffffc0000000000 CONFIG_X86_64_SMP=y CONFIG_ARCH_SUPPORTS_UPROBES=y CONFIG_FIX_EARLYCON_MEM=y CONFIG_PGTABLE_LEVELS=4 CONFIG_CC_HAS_SANE_STACKPROTECTOR=y # # Processor type and features # # CONFIG_ZONE_DMA is not set CONFIG_SMP=y CONFIG_X86_FEATURE_NAMES=y # CONFIG_X86_X2APIC is not set CONFIG_X86_MPPARSE=y # CONFIG_GOLDFISH is not set # CONFIG_RETPOLINE is not set # CONFIG_X86_CPU_RESCTRL is not set # CONFIG_X86_EXTENDED_PLATFORM is not set # CONFIG_X86_AMD_PLATFORM_DEVICE is not set # CONFIG_SCHED_OMIT_FRAME_POINTER is not set CONFIG_HYPERVISOR_GUEST=y CONFIG_PARAVIRT=y # CONFIG_PARAVIRT_DEBUG is not set CONFIG_PARAVIRT_SPINLOCKS=y # CONFIG_XEN is not set CONFIG_KVM_GUEST=y CONFIG_ARCH_CPUIDLE_HALTPOLL=y # CONFIG_PVH is not set # CONFIG_KVM_DEBUG_FS is not set # CONFIG_PARAVIRT_TIME_ACCOUNTING is not set CONFIG_PARAVIRT_CLOCK=y # CONFIG_ACRN_GUEST is not set # CONFIG_MK8 is not set # CONFIG_MPSC is not set # CONFIG_MCORE2 is not set # CONFIG_MATOM is not set CONFIG_GENERIC_CPU=y CONFIG_X86_INTERNODE_CACHE_SHIFT=6 CONFIG_X86_L1_CACHE_SHIFT=6 CONFIG_X86_TSC=y CONFIG_X86_CMPXCHG64=y CONFIG_X86_CMOV=y CONFIG_X86_MINIMUM_CPU_FAMILY=64 CONFIG_X86_DEBUGCTLMSR=y # CONFIG_PROCESSOR_SELECT is not set CONFIG_CPU_SUP_INTEL=y CONFIG_CPU_SUP_AMD=y CONFIG_CPU_SUP_HYGON=y CONFIG_CPU_SUP_CENTAUR=y CONFIG_CPU_SUP_ZHAOXIN=y CONFIG_HPET_TIMER=y # CONFIG_DMI is not set # CONFIG_MAXSMP is not set CONFIG_NR_CPUS_RANGE_BEGIN=2 CONFIG_NR_CPUS_RANGE_END=512 CONFIG_NR_CPUS_DEFAULT=64 CONFIG_NR_CPUS=4 CONFIG_SCHED_SMT=y CONFIG_SCHED_MC=y # CONFIG_SCHED_MC_PRIO is not set CONFIG_X86_LOCAL_APIC=y CONFIG_X86_IO_APIC=y # CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS is not set # CONFIG_X86_MCE is not set # # Performance monitoring # # CONFIG_PERF_EVENTS_AMD_POWER is not set # end of Performance monitoring # CONFIG_X86_VSYSCALL_EMULATION is not set # CONFIG_I8K is not set # CONFIG_MICROCODE is not set # CONFIG_X86_MSR is not set # CONFIG_X86_CPUID is not set # CONFIG_X86_5LEVEL is not set CONFIG_X86_DIRECT_GBPAGES=y # CONFIG_X86_CPA_STATISTICS is not set # CONFIG_AMD_MEM_ENCRYPT is not set CONFIG_NUMA=y # CONFIG_NUMA_EMU is not set CONFIG_NODES_SHIFT=6 CONFIG_ARCH_SPARSEMEM_ENABLE=y CONFIG_ARCH_SPARSEMEM_DEFAULT=y CONFIG_ARCH_SELECT_MEMORY_MODEL=y CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000 # CONFIG_X86_CHECK_BIOS_CORRUPTION is not set CONFIG_X86_RESERVE_LOW=64 # CONFIG_MTRR is not set CONFIG_ARCH_RANDOM=y # CONFIG_X86_SMAP is not set # CONFIG_X86_INTEL_UMIP is not set # CONFIG_X86_INTEL_MPX is not set # CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS is not set CONFIG_X86_INTEL_TSX_MODE_OFF=y # CONFIG_X86_INTEL_TSX_MODE_ON is not set # CONFIG_X86_INTEL_TSX_MODE_AUTO is not set # CONFIG_EFI is not set # CONFIG_SECCOMP is not set # CONFIG_HZ_100 is not set CONFIG_HZ_250=y # CONFIG_HZ_300 is not set # CONFIG_HZ_1000 is not set CONFIG_HZ=250 CONFIG_SCHED_HRTICK=y # CONFIG_KEXEC is not set # CONFIG_CRASH_DUMP is not set CONFIG_PHYSICAL_START=0x1000000 # CONFIG_RELOCATABLE is not set CONFIG_PHYSICAL_ALIGN=0x200000 CONFIG_HOTPLUG_CPU=y # CONFIG_BOOTPARAM_HOTPLUG_CPU0 is not set # CONFIG_DEBUG_HOTPLUG_CPU0 is not set # CONFIG_LEGACY_VSYSCALL_EMULATE is not set # CONFIG_LEGACY_VSYSCALL_XONLY is not set CONFIG_LEGACY_VSYSCALL_NONE=y CONFIG_CMDLINE_BOOL=y CONFIG_CMDLINE="console=ttyS0 wg.success=ttyS1 panic_on_warn=1" # CONFIG_CMDLINE_OVERRIDE is not set # CONFIG_MODIFY_LDT_SYSCALL is not set CONFIG_HAVE_LIVEPATCH=y # end of Processor type and features CONFIG_ARCH_HAS_ADD_PAGES=y CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y CONFIG_USE_PERCPU_NUMA_NODE_ID=y CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y # # Power management and ACPI options # # CONFIG_SUSPEND is not set # CONFIG_PM is not set CONFIG_ARCH_SUPPORTS_ACPI=y CONFIG_ACPI=y CONFIG_ACPI_LEGACY_TABLES_LOOKUP=y CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC=y CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT=y # CONFIG_ACPI_DEBUGGER is not set # CONFIG_ACPI_SPCR_TABLE is not set CONFIG_ACPI_LPIT=y # CONFIG_ACPI_PROCFS_POWER is not set # CONFIG_ACPI_REV_OVERRIDE_POSSIBLE is not set # CONFIG_ACPI_EC_DEBUGFS is not set # CONFIG_ACPI_AC is not set # CONFIG_ACPI_BATTERY is not set # CONFIG_ACPI_DOCK is not set CONFIG_ACPI_PROCESSOR_CSTATE=y # CONFIG_ACPI_PROCESSOR is not set # CONFIG_ACPI_NUMA is not set CONFIG_ACPI_CUSTOM_DSDT_FILE="" CONFIG_ARCH_HAS_ACPI_TABLE_UPGRADE=y # CONFIG_ACPI_TABLE_UPGRADE is not set # CONFIG_ACPI_DEBUG is not set # CONFIG_ACPI_CONTAINER is not set # CONFIG_ACPI_SBS is not set # CONFIG_ACPI_HED is not set # CONFIG_ACPI_CUSTOM_METHOD is not set # CONFIG_ACPI_REDUCED_HARDWARE_ONLY is not set CONFIG_HAVE_ACPI_APEI=y CONFIG_HAVE_ACPI_APEI_NMI=y # CONFIG_ACPI_APEI is not set # CONFIG_DPTF_POWER is not set # CONFIG_PMIC_OPREGION is not set # CONFIG_ACPI_CONFIGFS is not set # CONFIG_X86_PM_TIMER is not set # CONFIG_SFI is not set # # CPU Frequency scaling # # CONFIG_CPU_FREQ is not set # end of CPU Frequency scaling # # CPU Idle # # CONFIG_CPU_IDLE is not set # end of CPU Idle # end of Power management and ACPI options # # Bus options (PCI etc.) # # CONFIG_ISA_BUS is not set # CONFIG_ISA_DMA_API is not set # CONFIG_X86_SYSFB is not set # end of Bus options (PCI etc.) # # Binary Emulations # # CONFIG_IA32_EMULATION is not set # CONFIG_X86_X32 is not set # end of Binary Emulations # # Firmware Drivers # # CONFIG_EDD is not set # CONFIG_FIRMWARE_MEMMAP is not set # CONFIG_FW_CFG_SYSFS is not set # CONFIG_GOOGLE_FIRMWARE is not set # # Tegra firmware driver # # end of Tegra firmware driver # end of Firmware Drivers CONFIG_HAVE_KVM=y CONFIG_VIRTUALIZATION=y # CONFIG_KVM is not set # CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set # # General architecture-dependent options # CONFIG_HOTPLUG_SMT=y CONFIG_HAVE_OPROFILE=y CONFIG_OPROFILE_NMI_TIMER=y CONFIG_JUMP_LABEL=y # CONFIG_STATIC_KEYS_SELFTEST is not set CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y CONFIG_ARCH_USE_BUILTIN_BSWAP=y CONFIG_HAVE_IOREMAP_PROT=y CONFIG_HAVE_KPROBES=y CONFIG_HAVE_KRETPROBES=y CONFIG_HAVE_OPTPROBES=y CONFIG_HAVE_KPROBES_ON_FTRACE=y CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y CONFIG_HAVE_NMI=y CONFIG_HAVE_ARCH_TRACEHOOK=y CONFIG_HAVE_DMA_CONTIGUOUS=y CONFIG_GENERIC_SMP_IDLE_THREAD=y CONFIG_ARCH_HAS_FORTIFY_SOURCE=y CONFIG_ARCH_HAS_SET_MEMORY=y CONFIG_ARCH_HAS_SET_DIRECT_MAP=y CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST=y CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT=y CONFIG_HAVE_ASM_MODVERSIONS=y CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y CONFIG_HAVE_RSEQ=y CONFIG_HAVE_FUNCTION_ARG_ACCESS_API=y CONFIG_HAVE_HW_BREAKPOINT=y CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y CONFIG_HAVE_USER_RETURN_NOTIFIER=y CONFIG_HAVE_PERF_EVENTS_NMI=y CONFIG_HAVE_HARDLOCKUP_DETECTOR_PERF=y CONFIG_HAVE_PERF_REGS=y CONFIG_HAVE_PERF_USER_STACK_DUMP=y CONFIG_HAVE_ARCH_JUMP_LABEL=y CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE=y CONFIG_HAVE_RCU_TABLE_FREE=y CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y CONFIG_HAVE_ALIGNED_STRUCT_PAGE=y CONFIG_HAVE_CMPXCHG_LOCAL=y CONFIG_HAVE_CMPXCHG_DOUBLE=y CONFIG_HAVE_ARCH_SECCOMP_FILTER=y CONFIG_HAVE_ARCH_STACKLEAK=y CONFIG_HAVE_STACKPROTECTOR=y CONFIG_CC_HAS_STACKPROTECTOR_NONE=y # CONFIG_STACKPROTECTOR is not set CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES=y CONFIG_HAVE_CONTEXT_TRACKING=y CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y CONFIG_HAVE_MOVE_PMD=y CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD=y CONFIG_HAVE_ARCH_HUGE_VMAP=y CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y CONFIG_HAVE_ARCH_SOFT_DIRTY=y CONFIG_HAVE_MOD_ARCH_SPECIFIC=y CONFIG_MODULES_USE_ELF_RELA=y CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y CONFIG_ARCH_HAS_ELF_RANDOMIZE=y CONFIG_HAVE_ARCH_MMAP_RND_BITS=y CONFIG_HAVE_EXIT_THREAD=y CONFIG_ARCH_MMAP_RND_BITS=28 CONFIG_HAVE_COPY_THREAD_TLS=y CONFIG_HAVE_STACK_VALIDATION=y CONFIG_HAVE_RELIABLE_STACKTRACE=y CONFIG_64BIT_TIME=y CONFIG_HAVE_ARCH_VMAP_STACK=y CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y CONFIG_STRICT_KERNEL_RWX=y CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y CONFIG_ARCH_HAS_REFCOUNT=y # CONFIG_REFCOUNT_FULL is not set CONFIG_HAVE_ARCH_PREL32_RELOCATIONS=y # CONFIG_LOCK_EVENT_COUNTS is not set CONFIG_ARCH_HAS_MEM_ENCRYPT=y # # GCOV-based kernel profiling # # CONFIG_GCOV_KERNEL is not set CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y # end of GCOV-based kernel profiling CONFIG_PLUGIN_HOSTCC="" CONFIG_HAVE_GCC_PLUGINS=y # end of General architecture-dependent options CONFIG_RT_MUTEXES=y CONFIG_BASE_SMALL=0 # CONFIG_MODULES is not set CONFIG_MODULES_TREE_LOOKUP=y # CONFIG_BLOCK is not set CONFIG_UNINLINE_SPIN_UNLOCK=y CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y CONFIG_MUTEX_SPIN_ON_OWNER=y CONFIG_RWSEM_SPIN_ON_OWNER=y CONFIG_LOCK_SPIN_ON_OWNER=y CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y CONFIG_QUEUED_SPINLOCKS=y CONFIG_ARCH_USE_QUEUED_RWLOCKS=y CONFIG_QUEUED_RWLOCKS=y CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y # # Executable file formats # CONFIG_BINFMT_ELF=y CONFIG_ELFCORE=y CONFIG_BINFMT_SCRIPT=y # CONFIG_BINFMT_MISC is not set # CONFIG_COREDUMP is not set # end of Executable file formats # # Memory Management options # CONFIG_SELECT_MEMORY_MODEL=y CONFIG_SPARSEMEM_MANUAL=y CONFIG_SPARSEMEM=y CONFIG_NEED_MULTIPLE_NODES=y CONFIG_HAVE_MEMORY_PRESENT=y CONFIG_SPARSEMEM_EXTREME=y CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y CONFIG_SPARSEMEM_VMEMMAP=y CONFIG_HAVE_MEMBLOCK_NODE_MAP=y CONFIG_HAVE_FAST_GUP=y # CONFIG_MEMORY_HOTPLUG is not set CONFIG_SPLIT_PTLOCK_CPUS=4 # CONFIG_COMPACTION is not set # CONFIG_MIGRATION is not set CONFIG_PHYS_ADDR_T_64BIT=y CONFIG_VIRT_TO_BUS=y # CONFIG_KSM is not set CONFIG_DEFAULT_MMAP_MIN_ADDR=4096 # CONFIG_TRANSPARENT_HUGEPAGE is not set CONFIG_ARCH_WANTS_THP_SWAP=y # CONFIG_CLEANCACHE is not set # CONFIG_CMA is not set # CONFIG_ZPOOL is not set # CONFIG_ZBUD is not set # CONFIG_ZSMALLOC is not set CONFIG_GENERIC_EARLY_IOREMAP=y # CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set # CONFIG_IDLE_PAGE_TRACKING is not set CONFIG_ARCH_HAS_PTE_DEVMAP=y # CONFIG_PERCPU_STATS is not set # CONFIG_GUP_BENCHMARK is not set CONFIG_ARCH_HAS_PTE_SPECIAL=y # end of Memory Management options CONFIG_NET=y # # Networking options # # CONFIG_PACKET is not set CONFIG_UNIX=y CONFIG_UNIX_SCM=y # CONFIG_UNIX_DIAG is not set # CONFIG_TLS is not set # CONFIG_XFRM_USER is not set # CONFIG_NET_KEY is not set CONFIG_INET=y CONFIG_WIREGUARD=y CONFIG_WIREGUARD_DEBUG=y # CONFIG_IP_MULTICAST is not set CONFIG_IP_ADVANCED_ROUTER=y # CONFIG_IP_FIB_TRIE_STATS is not set CONFIG_IP_MULTIPLE_TABLES=y # CONFIG_IP_ROUTE_MULTIPATH is not set # CONFIG_IP_ROUTE_VERBOSE is not set # CONFIG_IP_PNP is not set CONFIG_NET_IPIP=y # CONFIG_NET_IPGRE_DEMUX is not set CONFIG_NET_IP_TUNNEL=y # CONFIG_SYN_COOKIES is not set # CONFIG_NET_IPVTI is not set CONFIG_NET_UDP_TUNNEL=y # CONFIG_NET_FOU is not set # CONFIG_NET_FOU_IP_TUNNELS is not set # CONFIG_INET_AH is not set # CONFIG_INET_ESP is not set # CONFIG_INET_IPCOMP is not set CONFIG_INET_TUNNEL=y # CONFIG_INET_DIAG is not set # CONFIG_TCP_CONG_ADVANCED is not set CONFIG_TCP_CONG_CUBIC=y CONFIG_DEFAULT_TCP_CONG="cubic" # CONFIG_TCP_MD5SIG is not set CONFIG_IPV6=y # CONFIG_IPV6_ROUTER_PREF is not set # CONFIG_IPV6_OPTIMISTIC_DAD is not set # CONFIG_INET6_AH is not set # CONFIG_INET6_ESP is not set # CONFIG_INET6_IPCOMP is not set # CONFIG_IPV6_MIP6 is not set # CONFIG_IPV6_ILA is not set # CONFIG_IPV6_VTI is not set # CONFIG_IPV6_SIT is not set # CONFIG_IPV6_TUNNEL is not set CONFIG_IPV6_MULTIPLE_TABLES=y # CONFIG_IPV6_SUBTREES is not set # CONFIG_IPV6_MROUTE is not set # CONFIG_IPV6_SEG6_LWTUNNEL is not set # CONFIG_IPV6_SEG6_HMAC is not set # CONFIG_NETWORK_SECMARK is not set # CONFIG_NETWORK_PHY_TIMESTAMPING is not set CONFIG_NETFILTER=y CONFIG_NETFILTER_ADVANCED=y # # Core Netfilter Configuration # # CONFIG_NETFILTER_INGRESS is not set # CONFIG_NETFILTER_NETLINK_ACCT is not set # CONFIG_NETFILTER_NETLINK_QUEUE is not set # CONFIG_NETFILTER_NETLINK_LOG is not set # CONFIG_NETFILTER_NETLINK_OSF is not set CONFIG_NF_CONNTRACK=y # CONFIG_NF_LOG_NETDEV is not set # CONFIG_NF_CONNTRACK_MARK is not set # CONFIG_NF_CONNTRACK_ZONES is not set # CONFIG_NF_CONNTRACK_PROCFS is not set # CONFIG_NF_CONNTRACK_EVENTS is not set # CONFIG_NF_CONNTRACK_TIMEOUT is not set # CONFIG_NF_CONNTRACK_TIMESTAMP is not set # CONFIG_NF_CONNTRACK_LABELS is not set # CONFIG_NF_CT_PROTO_DCCP is not set # CONFIG_NF_CT_PROTO_SCTP is not set # CONFIG_NF_CT_PROTO_UDPLITE is not set # CONFIG_NF_CONNTRACK_AMANDA is not set # CONFIG_NF_CONNTRACK_FTP is not set # CONFIG_NF_CONNTRACK_H323 is not set # CONFIG_NF_CONNTRACK_IRC is not set # CONFIG_NF_CONNTRACK_NETBIOS_NS is not set # CONFIG_NF_CONNTRACK_SNMP is not set # CONFIG_NF_CONNTRACK_PPTP is not set # CONFIG_NF_CONNTRACK_SANE is not set # CONFIG_NF_CONNTRACK_SIP is not set # CONFIG_NF_CONNTRACK_TFTP is not set # CONFIG_NF_CT_NETLINK is not set CONFIG_NF_NAT=y # CONFIG_NF_TABLES is not set CONFIG_NETFILTER_XTABLES=y # # Xtables combined modules # CONFIG_NETFILTER_XT_MARK=y # CONFIG_NETFILTER_XT_CONNMARK is not set # # Xtables targets # # CONFIG_NETFILTER_XT_TARGET_CHECKSUM is not set # CONFIG_NETFILTER_XT_TARGET_CLASSIFY is not set # CONFIG_NETFILTER_XT_TARGET_CONNMARK is not set # CONFIG_NETFILTER_XT_TARGET_DSCP is not set # CONFIG_NETFILTER_XT_TARGET_HL is not set # CONFIG_NETFILTER_XT_TARGET_HMARK is not set # CONFIG_NETFILTER_XT_TARGET_IDLETIMER is not set # CONFIG_NETFILTER_XT_TARGET_LOG is not set # CONFIG_NETFILTER_XT_TARGET_MARK is not set CONFIG_NETFILTER_XT_NAT=y # CONFIG_NETFILTER_XT_TARGET_NETMAP is not set # CONFIG_NETFILTER_XT_TARGET_NFLOG is not set # CONFIG_NETFILTER_XT_TARGET_NFQUEUE is not set # CONFIG_NETFILTER_XT_TARGET_RATEEST is not set # CONFIG_NETFILTER_XT_TARGET_REDIRECT is not set # CONFIG_NETFILTER_XT_TARGET_MASQUERADE is not set # CONFIG_NETFILTER_XT_TARGET_TEE is not set # CONFIG_NETFILTER_XT_TARGET_TPROXY is not set # CONFIG_NETFILTER_XT_TARGET_TCPMSS is not set # CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP is not set # # Xtables matches # # CONFIG_NETFILTER_XT_MATCH_ADDRTYPE is not set # CONFIG_NETFILTER_XT_MATCH_BPF is not set # CONFIG_NETFILTER_XT_MATCH_CLUSTER is not set # CONFIG_NETFILTER_XT_MATCH_COMMENT is not set # CONFIG_NETFILTER_XT_MATCH_CONNBYTES is not set # CONFIG_NETFILTER_XT_MATCH_CONNLABEL is not set # CONFIG_NETFILTER_XT_MATCH_CONNLIMIT is not set # CONFIG_NETFILTER_XT_MATCH_CONNMARK is not set # CONFIG_NETFILTER_XT_MATCH_CONNTRACK is not set # CONFIG_NETFILTER_XT_MATCH_CPU is not set # CONFIG_NETFILTER_XT_MATCH_DCCP is not set # CONFIG_NETFILTER_XT_MATCH_DEVGROUP is not set # CONFIG_NETFILTER_XT_MATCH_DSCP is not set # CONFIG_NETFILTER_XT_MATCH_ECN is not set # CONFIG_NETFILTER_XT_MATCH_ESP is not set # CONFIG_NETFILTER_XT_MATCH_HASHLIMIT is not set # CONFIG_NETFILTER_XT_MATCH_HELPER is not set # CONFIG_NETFILTER_XT_MATCH_HL is not set # CONFIG_NETFILTER_XT_MATCH_IPCOMP is not set # CONFIG_NETFILTER_XT_MATCH_IPRANGE is not set # CONFIG_NETFILTER_XT_MATCH_L2TP is not set CONFIG_NETFILTER_XT_MATCH_LENGTH=y # CONFIG_NETFILTER_XT_MATCH_LIMIT is not set # CONFIG_NETFILTER_XT_MATCH_MAC is not set # CONFIG_NETFILTER_XT_MATCH_MARK is not set # CONFIG_NETFILTER_XT_MATCH_MULTIPORT is not set # CONFIG_NETFILTER_XT_MATCH_NFACCT is not set # CONFIG_NETFILTER_XT_MATCH_OSF is not set # CONFIG_NETFILTER_XT_MATCH_OWNER is not set # CONFIG_NETFILTER_XT_MATCH_PKTTYPE is not set # CONFIG_NETFILTER_XT_MATCH_QUOTA is not set # CONFIG_NETFILTER_XT_MATCH_RATEEST is not set # CONFIG_NETFILTER_XT_MATCH_REALM is not set # CONFIG_NETFILTER_XT_MATCH_RECENT is not set # CONFIG_NETFILTER_XT_MATCH_SCTP is not set # CONFIG_NETFILTER_XT_MATCH_SOCKET is not set # CONFIG_NETFILTER_XT_MATCH_STATE is not set # CONFIG_NETFILTER_XT_MATCH_STATISTIC is not set # CONFIG_NETFILTER_XT_MATCH_STRING is not set # CONFIG_NETFILTER_XT_MATCH_TCPMSS is not set # CONFIG_NETFILTER_XT_MATCH_TIME is not set # CONFIG_NETFILTER_XT_MATCH_U32 is not set # end of Core Netfilter Configuration # CONFIG_IP_SET is not set # CONFIG_IP_VS is not set # # IP: Netfilter Configuration # CONFIG_NF_DEFRAG_IPV4=y # CONFIG_NF_SOCKET_IPV4 is not set # CONFIG_NF_TPROXY_IPV4 is not set # CONFIG_NF_DUP_IPV4 is not set # CONFIG_NF_LOG_ARP is not set # CONFIG_NF_LOG_IPV4 is not set # CONFIG_NF_REJECT_IPV4 is not set CONFIG_IP_NF_IPTABLES=y # CONFIG_IP_NF_MATCH_AH is not set # CONFIG_IP_NF_MATCH_ECN is not set # CONFIG_IP_NF_MATCH_RPFILTER is not set # CONFIG_IP_NF_MATCH_TTL is not set CONFIG_IP_NF_FILTER=y # CONFIG_IP_NF_TARGET_REJECT is not set # CONFIG_IP_NF_TARGET_SYNPROXY is not set CONFIG_IP_NF_NAT=y # CONFIG_IP_NF_TARGET_MASQUERADE is not set # CONFIG_IP_NF_TARGET_NETMAP is not set # CONFIG_IP_NF_TARGET_REDIRECT is not set CONFIG_IP_NF_MANGLE=y # CONFIG_IP_NF_TARGET_CLUSTERIP is not set # CONFIG_IP_NF_TARGET_ECN is not set # CONFIG_IP_NF_TARGET_TTL is not set # CONFIG_IP_NF_RAW is not set # CONFIG_IP_NF_ARPTABLES is not set # end of IP: Netfilter Configuration # # IPv6: Netfilter Configuration # # CONFIG_NF_SOCKET_IPV6 is not set # CONFIG_NF_TPROXY_IPV6 is not set # CONFIG_NF_DUP_IPV6 is not set # CONFIG_NF_REJECT_IPV6 is not set # CONFIG_NF_LOG_IPV6 is not set # CONFIG_IP6_NF_IPTABLES is not set # end of IPv6: Netfilter Configuration CONFIG_NF_DEFRAG_IPV6=y # CONFIG_NF_CONNTRACK_BRIDGE is not set # CONFIG_BPFILTER is not set # CONFIG_IP_DCCP is not set # CONFIG_IP_SCTP is not set # CONFIG_RDS is not set # CONFIG_TIPC is not set # CONFIG_ATM is not set # CONFIG_L2TP is not set # CONFIG_BRIDGE is not set CONFIG_HAVE_NET_DSA=y # CONFIG_NET_DSA is not set # CONFIG_VLAN_8021Q is not set # CONFIG_DECNET is not set # CONFIG_LLC2 is not set # CONFIG_ATALK is not set # CONFIG_X25 is not set # CONFIG_LAPB is not set # CONFIG_PHONET is not set # CONFIG_6LOWPAN is not set # CONFIG_IEEE802154 is not set # CONFIG_NET_SCHED is not set # CONFIG_DCB is not set # CONFIG_BATMAN_ADV is not set # CONFIG_OPENVSWITCH is not set # CONFIG_VSOCKETS is not set # CONFIG_NETLINK_DIAG is not set # CONFIG_MPLS is not set # CONFIG_NET_NSH is not set # CONFIG_HSR is not set # CONFIG_NET_SWITCHDEV is not set # CONFIG_NET_L3_MASTER_DEV is not set # CONFIG_NET_NCSI is not set CONFIG_RPS=y CONFIG_RFS_ACCEL=y CONFIG_XPS=y CONFIG_NET_RX_BUSY_POLL=y CONFIG_BQL=y CONFIG_NET_FLOW_LIMIT=y # # Network testing # # CONFIG_NET_PKTGEN is not set # CONFIG_NET_DROP_MONITOR is not set # end of Network testing # end of Networking options # CONFIG_HAMRADIO is not set # CONFIG_CAN is not set # CONFIG_BT is not set # CONFIG_AF_RXRPC is not set # CONFIG_AF_KCM is not set CONFIG_FIB_RULES=y # CONFIG_WIRELESS is not set # CONFIG_WIMAX is not set # CONFIG_RFKILL is not set # CONFIG_NET_9P is not set # CONFIG_CAIF is not set # CONFIG_CEPH_LIB is not set # CONFIG_NFC is not set # CONFIG_PSAMPLE is not set # CONFIG_NET_IFE is not set # CONFIG_LWTUNNEL is not set CONFIG_DST_CACHE=y CONFIG_GRO_CELLS=y # CONFIG_FAILOVER is not set CONFIG_HAVE_EBPF_JIT=y # # Device Drivers # CONFIG_HAVE_EISA=y # CONFIG_EISA is not set CONFIG_HAVE_PCI=y # CONFIG_PCI is not set # CONFIG_PCCARD is not set # # Generic Driver Options # # CONFIG_UEVENT_HELPER is not set CONFIG_DEVTMPFS=y # CONFIG_DEVTMPFS_MOUNT is not set # CONFIG_STANDALONE is not set # CONFIG_PREVENT_FIRMWARE_BUILD is not set # # Firmware loader # # CONFIG_FW_LOADER is not set # end of Firmware loader # CONFIG_ALLOW_DEV_COREDUMP is not set # CONFIG_DEBUG_DRIVER is not set # CONFIG_DEBUG_DEVRES is not set # CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set CONFIG_GENERIC_CPU_AUTOPROBE=y CONFIG_GENERIC_CPU_VULNERABILITIES=y # end of Generic Driver Options # # Bus devices # # end of Bus devices # CONFIG_CONNECTOR is not set # CONFIG_GNSS is not set # CONFIG_MTD is not set # CONFIG_OF is not set CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y # CONFIG_PARPORT is not set CONFIG_PNP=y # CONFIG_PNP_DEBUG_MESSAGES is not set # # Protocols # CONFIG_PNPACPI=y # # NVME Support # # end of NVME Support # # Misc devices # # CONFIG_DUMMY_IRQ is not set # CONFIG_ENCLOSURE_SERVICES is not set # CONFIG_SRAM is not set # CONFIG_XILINX_SDFEC is not set # CONFIG_PVPANIC is not set # CONFIG_C2PORT is not set # # EEPROM support # # CONFIG_EEPROM_93CX6 is not set # end of EEPROM support # # Texas Instruments shared transport line discipline # # end of Texas Instruments shared transport line discipline # # Altera FPGA firmware download module (requires I2C) # # # Intel MIC & related support # # # Intel MIC Bus Driver # # # SCIF Bus Driver # # # VOP Bus Driver # # CONFIG_VOP_BUS is not set # # Intel MIC Host Driver # # # Intel MIC Card Driver # # # SCIF Driver # # # Intel MIC Coprocessor State Management (COSM) Drivers # # # VOP Driver # # end of Intel MIC & related support # CONFIG_ECHO is not set # end of Misc devices CONFIG_HAVE_IDE=y # # SCSI device support # CONFIG_SCSI_MOD=y # end of SCSI device support # CONFIG_MACINTOSH_DRIVERS is not set CONFIG_NETDEVICES=y CONFIG_NET_CORE=y # CONFIG_BONDING is not set CONFIG_DUMMY=y # CONFIG_EQUALIZER is not set # CONFIG_NET_TEAM is not set # CONFIG_MACVLAN is not set # CONFIG_IPVLAN is not set # CONFIG_VXLAN is not set # CONFIG_GENEVE is not set # CONFIG_GTP is not set # CONFIG_MACSEC is not set # CONFIG_NETCONSOLE is not set # CONFIG_TUN is not set # CONFIG_TUN_VNET_CROSS_LE is not set CONFIG_VETH=y # CONFIG_NLMON is not set # # CAIF transport drivers # # # Distributed Switch Architecture drivers # # end of Distributed Switch Architecture drivers # CONFIG_ETHERNET is not set # CONFIG_NET_SB1000 is not set # CONFIG_MDIO_DEVICE is not set # CONFIG_PHYLIB is not set # CONFIG_PPP is not set # CONFIG_SLIP is not set # # Host-side USB support is needed for USB Network Adapter support # # CONFIG_WLAN is not set # # Enable WiMAX (Networking options) to see the WiMAX drivers # # CONFIG_WAN is not set # CONFIG_FUJITSU_ES is not set # CONFIG_NETDEVSIM is not set # CONFIG_NET_FAILOVER is not set # CONFIG_ISDN is not set # # Input device support # # CONFIG_INPUT is not set # # Hardware I/O ports # # CONFIG_SERIO is not set CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y # CONFIG_GAMEPORT is not set # end of Hardware I/O ports # end of Input device support # # Character devices # CONFIG_TTY=y # CONFIG_VT is not set # CONFIG_UNIX98_PTYS is not set # CONFIG_LEGACY_PTYS is not set # CONFIG_SERIAL_NONSTANDARD is not set # CONFIG_N_GSM is not set # CONFIG_TRACE_SINK is not set # CONFIG_NULL_TTY is not set # CONFIG_LDISC_AUTOLOAD is not set # CONFIG_DEVMEM is not set # CONFIG_DEVKMEM is not set # # Serial drivers # CONFIG_SERIAL_EARLYCON=y CONFIG_SERIAL_8250=y # CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set # CONFIG_SERIAL_8250_PNP is not set # CONFIG_SERIAL_8250_FINTEK is not set CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_8250_NR_UARTS=4 CONFIG_SERIAL_8250_RUNTIME_UARTS=4 # CONFIG_SERIAL_8250_EXTENDED is not set # CONFIG_SERIAL_8250_DW is not set # CONFIG_SERIAL_8250_RT288X is not set # # Non-8250 serial port support # # CONFIG_SERIAL_UARTLITE is not set CONFIG_SERIAL_CORE=y CONFIG_SERIAL_CORE_CONSOLE=y # CONFIG_SERIAL_SCCNXP is not set # CONFIG_SERIAL_ALTERA_JTAGUART is not set # CONFIG_SERIAL_ALTERA_UART is not set # CONFIG_SERIAL_ARC is not set # CONFIG_SERIAL_FSL_LPUART is not set # CONFIG_SERIAL_FSL_LINFLEXUART is not set # end of Serial drivers # CONFIG_SERIAL_DEV_BUS is not set # CONFIG_TTY_PRINTK is not set # CONFIG_IPMI_HANDLER is not set # CONFIG_HW_RANDOM is not set # CONFIG_NVRAM is not set # CONFIG_MWAVE is not set # CONFIG_HPET is not set # CONFIG_HANGCHECK_TIMER is not set # CONFIG_TCG_TPM is not set # CONFIG_TELCLOCK is not set # end of Character devices # CONFIG_RANDOM_TRUST_CPU is not set # CONFIG_RANDOM_TRUST_BOOTLOADER is not set # # I2C support # # CONFIG_I2C is not set # end of I2C support # CONFIG_I3C is not set # CONFIG_SPI is not set # CONFIG_SPMI is not set # CONFIG_HSI is not set # CONFIG_PPS is not set # # PTP clock support # # CONFIG_PTP_1588_CLOCK is not set # # Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks. # # end of PTP clock support # CONFIG_PINCTRL is not set # CONFIG_GPIOLIB is not set # CONFIG_W1 is not set # CONFIG_POWER_AVS is not set # CONFIG_POWER_RESET is not set # CONFIG_POWER_SUPPLY is not set # CONFIG_HWMON is not set # CONFIG_THERMAL is not set # CONFIG_WATCHDOG is not set CONFIG_SSB_POSSIBLE=y # CONFIG_SSB is not set CONFIG_BCMA_POSSIBLE=y # CONFIG_BCMA is not set # # Multifunction device drivers # # CONFIG_MFD_MADERA is not set # CONFIG_HTC_PASIC3 is not set # CONFIG_MFD_INTEL_LPSS_ACPI is not set # CONFIG_MFD_KEMPLD is not set # CONFIG_MFD_MT6397 is not set # CONFIG_MFD_SM501 is not set # CONFIG_ABX500_CORE is not set # CONFIG_MFD_SYSCON is not set # CONFIG_MFD_TI_AM335X_TSCADC is not set # CONFIG_MFD_TQMX86 is not set # end of Multifunction device drivers # CONFIG_REGULATOR is not set # CONFIG_MEDIA_SUPPORT is not set # # Graphics support # # CONFIG_DRM is not set # CONFIG_DRM_DP_CEC is not set # # ARM devices # # end of ARM devices # # ACP (Audio CoProcessor) Configuration # # end of ACP (Audio CoProcessor) Configuration # # Frame buffer Devices # # CONFIG_FB is not set # end of Frame buffer Devices # # Backlight & LCD device support # # CONFIG_LCD_CLASS_DEVICE is not set # CONFIG_BACKLIGHT_CLASS_DEVICE is not set # end of Backlight & LCD device support # end of Graphics support # CONFIG_SOUND is not set CONFIG_USB_OHCI_LITTLE_ENDIAN=y # CONFIG_USB_SUPPORT is not set # CONFIG_MMC is not set # CONFIG_MEMSTICK is not set # CONFIG_NEW_LEDS is not set # CONFIG_ACCESSIBILITY is not set # CONFIG_INFINIBAND is not set CONFIG_EDAC_ATOMIC_SCRUB=y CONFIG_EDAC_SUPPORT=y CONFIG_RTC_LIB=y CONFIG_RTC_MC146818_LIB=y # CONFIG_RTC_CLASS is not set # CONFIG_DMADEVICES is not set # # DMABUF options # # CONFIG_SYNC_FILE is not set # end of DMABUF options # CONFIG_AUXDISPLAY is not set # CONFIG_UIO is not set # CONFIG_VFIO is not set # CONFIG_VIRT_DRIVERS is not set # CONFIG_VIRTIO_MENU is not set # # Microsoft Hyper-V guest support # # CONFIG_HYPERV is not set # end of Microsoft Hyper-V guest support # CONFIG_GREYBUS is not set # CONFIG_STAGING is not set # CONFIG_X86_PLATFORM_DEVICES is not set # CONFIG_MFD_CROS_EC is not set # CONFIG_CHROME_PLATFORMS is not set # CONFIG_MELLANOX_PLATFORM is not set # CONFIG_HWSPINLOCK is not set # # Clock Source drivers # CONFIG_CLKEVT_I8253=y CONFIG_CLKBLD_I8253=y # end of Clock Source drivers # CONFIG_MAILBOX is not set # CONFIG_IOMMU_SUPPORT is not set # # Remoteproc drivers # # CONFIG_REMOTEPROC is not set # end of Remoteproc drivers # # Rpmsg drivers # # CONFIG_RPMSG_VIRTIO is not set # end of Rpmsg drivers # CONFIG_SOUNDWIRE is not set # # SOC (System On Chip) specific Drivers # # # Amlogic SoC drivers # # end of Amlogic SoC drivers # # Aspeed SoC drivers # # end of Aspeed SoC drivers # # Broadcom SoC drivers # # end of Broadcom SoC drivers # # NXP/Freescale QorIQ SoC drivers # # end of NXP/Freescale QorIQ SoC drivers # # i.MX SoC drivers # # end of i.MX SoC drivers # # Qualcomm SoC drivers # # end of Qualcomm SoC drivers # CONFIG_SOC_TI is not set # # Xilinx SoC drivers # # CONFIG_XILINX_VCU is not set # end of Xilinx SoC drivers # end of SOC (System On Chip) specific Drivers # CONFIG_PM_DEVFREQ is not set # CONFIG_EXTCON is not set # CONFIG_MEMORY is not set # CONFIG_IIO is not set # CONFIG_PWM is not set # # IRQ chip support # # end of IRQ chip support # CONFIG_IPACK_BUS is not set # CONFIG_RESET_CONTROLLER is not set # # PHY Subsystem # # CONFIG_GENERIC_PHY is not set # CONFIG_BCM_KONA_USB2_PHY is not set # CONFIG_PHY_PXA_28NM_HSIC is not set # CONFIG_PHY_PXA_28NM_USB2 is not set # end of PHY Subsystem # CONFIG_POWERCAP is not set # CONFIG_MCB is not set # # Performance monitor support # # end of Performance monitor support # CONFIG_RAS is not set # # Android # # CONFIG_ANDROID is not set # end of Android # CONFIG_DAX is not set # CONFIG_NVMEM is not set # # HW tracing support # # CONFIG_STM is not set # CONFIG_INTEL_TH is not set # end of HW tracing support # CONFIG_FPGA is not set # CONFIG_UNISYS_VISORBUS is not set # CONFIG_SIOX is not set # CONFIG_SLIMBUS is not set # CONFIG_INTERCONNECT is not set # CONFIG_COUNTER is not set # end of Device Drivers # # File systems # CONFIG_DCACHE_WORD_ACCESS=y # CONFIG_VALIDATE_FS_PARSER is not set # CONFIG_EXPORTFS_BLOCK_OPS is not set CONFIG_FILE_LOCKING=y # CONFIG_MANDATORY_FILE_LOCKING is not set # CONFIG_FS_ENCRYPTION is not set # CONFIG_FS_VERITY is not set # CONFIG_DNOTIFY is not set # CONFIG_INOTIFY_USER is not set # CONFIG_FANOTIFY is not set # CONFIG_QUOTA is not set # CONFIG_AUTOFS4_FS is not set # CONFIG_AUTOFS_FS is not set # CONFIG_FUSE_FS is not set # CONFIG_OVERLAY_FS is not set # # Caches # # CONFIG_FSCACHE is not set # end of Caches # # Pseudo filesystems # CONFIG_PROC_FS=y # CONFIG_PROC_KCORE is not set CONFIG_PROC_SYSCTL=y # CONFIG_PROC_PAGE_MONITOR is not set # CONFIG_PROC_CHILDREN is not set CONFIG_PROC_PID_ARCH_STATUS=y CONFIG_KERNFS=y CONFIG_SYSFS=y CONFIG_TMPFS=y # CONFIG_TMPFS_POSIX_ACL is not set # CONFIG_TMPFS_XATTR is not set # CONFIG_HUGETLBFS is not set CONFIG_MEMFD_CREATE=y CONFIG_ARCH_HAS_GIGANTIC_PAGE=y # CONFIG_CONFIGFS_FS is not set # end of Pseudo filesystems # CONFIG_MISC_FILESYSTEMS is not set # CONFIG_NETWORK_FILESYSTEMS is not set CONFIG_NLS=y CONFIG_NLS_DEFAULT="iso8859-1" # CONFIG_NLS_CODEPAGE_437 is not set # CONFIG_NLS_CODEPAGE_737 is not set # CONFIG_NLS_CODEPAGE_775 is not set # CONFIG_NLS_CODEPAGE_850 is not set # CONFIG_NLS_CODEPAGE_852 is not set # CONFIG_NLS_CODEPAGE_855 is not set # CONFIG_NLS_CODEPAGE_857 is not set # CONFIG_NLS_CODEPAGE_860 is not set # CONFIG_NLS_CODEPAGE_861 is not set # CONFIG_NLS_CODEPAGE_862 is not set # CONFIG_NLS_CODEPAGE_863 is not set # CONFIG_NLS_CODEPAGE_864 is not set # CONFIG_NLS_CODEPAGE_865 is not set # CONFIG_NLS_CODEPAGE_866 is not set # CONFIG_NLS_CODEPAGE_869 is not set # CONFIG_NLS_CODEPAGE_936 is not set # CONFIG_NLS_CODEPAGE_950 is not set # CONFIG_NLS_CODEPAGE_932 is not set # CONFIG_NLS_CODEPAGE_949 is not set # CONFIG_NLS_CODEPAGE_874 is not set # CONFIG_NLS_ISO8859_8 is not set # CONFIG_NLS_CODEPAGE_1250 is not set # CONFIG_NLS_CODEPAGE_1251 is not set # CONFIG_NLS_ASCII is not set # CONFIG_NLS_ISO8859_1 is not set # CONFIG_NLS_ISO8859_2 is not set # CONFIG_NLS_ISO8859_3 is not set # CONFIG_NLS_ISO8859_4 is not set # CONFIG_NLS_ISO8859_5 is not set # CONFIG_NLS_ISO8859_6 is not set # CONFIG_NLS_ISO8859_7 is not set # CONFIG_NLS_ISO8859_9 is not set # CONFIG_NLS_ISO8859_13 is not set # CONFIG_NLS_ISO8859_14 is not set # CONFIG_NLS_ISO8859_15 is not set # CONFIG_NLS_KOI8_R is not set # CONFIG_NLS_KOI8_U is not set # CONFIG_NLS_MAC_ROMAN is not set # CONFIG_NLS_MAC_CELTIC is not set # CONFIG_NLS_MAC_CENTEURO is not set # CONFIG_NLS_MAC_CROATIAN is not set # CONFIG_NLS_MAC_CYRILLIC is not set # CONFIG_NLS_MAC_GAELIC is not set # CONFIG_NLS_MAC_GREEK is not set # CONFIG_NLS_MAC_ICELAND is not set # CONFIG_NLS_MAC_INUIT is not set # CONFIG_NLS_MAC_ROMANIAN is not set # CONFIG_NLS_MAC_TURKISH is not set # CONFIG_NLS_UTF8 is not set # CONFIG_UNICODE is not set # end of File systems # # Security options # # CONFIG_KEYS is not set # CONFIG_SECURITY_DMESG_RESTRICT is not set # CONFIG_SECURITY is not set # CONFIG_SECURITYFS is not set # CONFIG_PAGE_TABLE_ISOLATION is not set CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y # CONFIG_HARDENED_USERCOPY is not set # CONFIG_FORTIFY_SOURCE is not set # CONFIG_STATIC_USERMODEHELPER is not set CONFIG_DEFAULT_SECURITY_DAC=y CONFIG_LSM="lockdown,yama,loadpin,safesetid,integrity" # # Kernel hardening options # # # Memory initialization # CONFIG_INIT_STACK_NONE=y # CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set # CONFIG_INIT_ON_FREE_DEFAULT_ON is not set # end of Memory initialization # end of Kernel hardening options # end of Security options CONFIG_CRYPTO=y # # Crypto core or helper # CONFIG_CRYPTO_ALGAPI=y CONFIG_CRYPTO_ALGAPI2=y # CONFIG_CRYPTO_MANAGER is not set # CONFIG_CRYPTO_USER is not set # CONFIG_CRYPTO_NULL is not set # CONFIG_CRYPTO_PCRYPT is not set # CONFIG_CRYPTO_CRYPTD is not set # CONFIG_CRYPTO_AUTHENC is not set # # Public-key cryptography # # CONFIG_CRYPTO_RSA is not set # CONFIG_CRYPTO_DH is not set # CONFIG_CRYPTO_ECDH is not set # CONFIG_CRYPTO_ECRDSA is not set # # Authenticated Encryption with Associated Data # # CONFIG_CRYPTO_CCM is not set # CONFIG_CRYPTO_GCM is not set # CONFIG_CRYPTO_CHACHA20POLY1305 is not set # CONFIG_CRYPTO_AEGIS128 is not set # CONFIG_CRYPTO_AEGIS128_AESNI_SSE2 is not set # CONFIG_CRYPTO_SEQIV is not set # CONFIG_CRYPTO_ECHAINIV is not set # # Block modes # # CONFIG_CRYPTO_CBC is not set # CONFIG_CRYPTO_CFB is not set # CONFIG_CRYPTO_CTR is not set # CONFIG_CRYPTO_CTS is not set # CONFIG_CRYPTO_ECB is not set # CONFIG_CRYPTO_LRW is not set # CONFIG_CRYPTO_OFB is not set # CONFIG_CRYPTO_PCBC is not set # CONFIG_CRYPTO_XTS is not set # CONFIG_CRYPTO_KEYWRAP is not set # CONFIG_CRYPTO_NHPOLY1305_SSE2 is not set # CONFIG_CRYPTO_NHPOLY1305_AVX2 is not set # CONFIG_CRYPTO_ADIANTUM is not set # CONFIG_CRYPTO_ESSIV is not set # # Hash modes # # CONFIG_CRYPTO_CMAC is not set # CONFIG_CRYPTO_HMAC is not set # CONFIG_CRYPTO_XCBC is not set # CONFIG_CRYPTO_VMAC is not set # # Digest # # CONFIG_CRYPTO_CRC32C is not set # CONFIG_CRYPTO_CRC32C_INTEL is not set # CONFIG_CRYPTO_CRC32 is not set # CONFIG_CRYPTO_CRC32_PCLMUL is not set # CONFIG_CRYPTO_XXHASH is not set # CONFIG_CRYPTO_CRCT10DIF is not set # CONFIG_CRYPTO_GHASH is not set # CONFIG_CRYPTO_POLY1305 is not set # CONFIG_CRYPTO_POLY1305_X86_64 is not set # CONFIG_CRYPTO_MD4 is not set # CONFIG_CRYPTO_MD5 is not set # CONFIG_CRYPTO_MICHAEL_MIC is not set # CONFIG_CRYPTO_RMD128 is not set # CONFIG_CRYPTO_RMD160 is not set # CONFIG_CRYPTO_RMD256 is not set # CONFIG_CRYPTO_RMD320 is not set # CONFIG_CRYPTO_SHA1 is not set # CONFIG_CRYPTO_SHA1_SSSE3 is not set # CONFIG_CRYPTO_SHA256_SSSE3 is not set # CONFIG_CRYPTO_SHA512_SSSE3 is not set # CONFIG_CRYPTO_SHA256 is not set # CONFIG_CRYPTO_SHA512 is not set # CONFIG_CRYPTO_SHA3 is not set # CONFIG_CRYPTO_SM3 is not set # CONFIG_CRYPTO_STREEBOG is not set # CONFIG_CRYPTO_TGR192 is not set # CONFIG_CRYPTO_WP512 is not set # CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL is not set # # Ciphers # # CONFIG_CRYPTO_AES is not set # CONFIG_CRYPTO_AES_TI is not set # CONFIG_CRYPTO_AES_NI_INTEL is not set # CONFIG_CRYPTO_ANUBIS is not set # CONFIG_CRYPTO_ARC4 is not set # CONFIG_CRYPTO_BLOWFISH is not set # CONFIG_CRYPTO_BLOWFISH_X86_64 is not set # CONFIG_CRYPTO_CAMELLIA is not set # CONFIG_CRYPTO_CAMELLIA_X86_64 is not set # CONFIG_CRYPTO_CAMELLIA_AESNI_AVX_X86_64 is not set # CONFIG_CRYPTO_CAMELLIA_AESNI_AVX2_X86_64 is not set # CONFIG_CRYPTO_CAST5 is not set # CONFIG_CRYPTO_CAST5_AVX_X86_64 is not set # CONFIG_CRYPTO_CAST6 is not set # CONFIG_CRYPTO_CAST6_AVX_X86_64 is not set # CONFIG_CRYPTO_DES is not set # CONFIG_CRYPTO_DES3_EDE_X86_64 is not set # CONFIG_CRYPTO_FCRYPT is not set # CONFIG_CRYPTO_KHAZAD is not set # CONFIG_CRYPTO_SALSA20 is not set # CONFIG_CRYPTO_CHACHA20 is not set # CONFIG_CRYPTO_CHACHA20_X86_64 is not set # CONFIG_CRYPTO_SEED is not set # CONFIG_CRYPTO_SERPENT is not set # CONFIG_CRYPTO_SERPENT_SSE2_X86_64 is not set # CONFIG_CRYPTO_SERPENT_AVX_X86_64 is not set # CONFIG_CRYPTO_SERPENT_AVX2_X86_64 is not set # CONFIG_CRYPTO_SM4 is not set # CONFIG_CRYPTO_TEA is not set # CONFIG_CRYPTO_TWOFISH is not set # CONFIG_CRYPTO_TWOFISH_X86_64 is not set # CONFIG_CRYPTO_TWOFISH_X86_64_3WAY is not set # CONFIG_CRYPTO_TWOFISH_AVX_X86_64 is not set # # Compression # # CONFIG_CRYPTO_DEFLATE is not set # CONFIG_CRYPTO_LZO is not set # CONFIG_CRYPTO_842 is not set # CONFIG_CRYPTO_LZ4 is not set # CONFIG_CRYPTO_LZ4HC is not set # CONFIG_CRYPTO_ZSTD is not set # # Random Number Generation # # CONFIG_CRYPTO_ANSI_CPRNG is not set # CONFIG_CRYPTO_DRBG_MENU is not set # CONFIG_CRYPTO_JITTERENTROPY is not set # CONFIG_CRYPTO_USER_API_HASH is not set # CONFIG_CRYPTO_USER_API_SKCIPHER is not set # CONFIG_CRYPTO_USER_API_RNG is not set # CONFIG_CRYPTO_USER_API_AEAD is not set # CONFIG_CRYPTO_HW is not set # # Certificates for signature checking # # end of Certificates for signature checking CONFIG_BINARY_PRINTF=y # # Library routines # # CONFIG_PACKING is not set CONFIG_BITREVERSE=y CONFIG_GENERIC_STRNCPY_FROM_USER=y CONFIG_GENERIC_STRNLEN_USER=y CONFIG_GENERIC_NET_UTILS=y CONFIG_GENERIC_FIND_FIRST_BIT=y # CONFIG_CORDIC is not set CONFIG_GENERIC_PCI_IOMAP=y CONFIG_GENERIC_IOMAP=y CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y CONFIG_ARCH_HAS_FAST_MULTIPLIER=y # CONFIG_CRC_CCITT is not set # CONFIG_CRC16 is not set # CONFIG_CRC_T10DIF is not set # CONFIG_CRC_ITU_T is not set CONFIG_CRC32=y # CONFIG_CRC32_SELFTEST is not set CONFIG_CRC32_SLICEBY8=y # CONFIG_CRC32_SLICEBY4 is not set # CONFIG_CRC32_SARWATE is not set # CONFIG_CRC32_BIT is not set # CONFIG_CRC64 is not set # CONFIG_CRC4 is not set # CONFIG_CRC7 is not set # CONFIG_LIBCRC32C is not set # CONFIG_CRC8 is not set # CONFIG_RANDOM32_SELFTEST is not set # CONFIG_XZ_DEC is not set CONFIG_HAS_IOMEM=y CONFIG_HAS_IOPORT_MAP=y CONFIG_HAS_DMA=y CONFIG_NEED_SG_DMA_LENGTH=y CONFIG_NEED_DMA_MAP_STATE=y CONFIG_ARCH_DMA_ADDR_T_64BIT=y CONFIG_SWIOTLB=y # CONFIG_DMA_API_DEBUG is not set CONFIG_CPU_RMAP=y CONFIG_DQL=y CONFIG_GLOB=y # CONFIG_GLOB_SELFTEST is not set CONFIG_NLATTR=y # CONFIG_IRQ_POLL is not set CONFIG_HAVE_GENERIC_VDSO=y CONFIG_GENERIC_GETTIMEOFDAY=y CONFIG_ARCH_HAS_PMEM_API=y CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y CONFIG_ARCH_STACKWALK=y CONFIG_STACKDEPOT=y # CONFIG_STRING_SELFTEST is not set # end of Library routines # # Kernel hacking # # # printk and dmesg options # CONFIG_PRINTK_TIME=y # CONFIG_PRINTK_CALLER is not set CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15 CONFIG_CONSOLE_LOGLEVEL_QUIET=4 CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4 # CONFIG_BOOT_PRINTK_DELAY is not set # CONFIG_DYNAMIC_DEBUG is not set # end of printk and dmesg options # # Compile-time checks and compiler options # CONFIG_DEBUG_INFO=y # CONFIG_DEBUG_INFO_REDUCED is not set # CONFIG_DEBUG_INFO_SPLIT is not set CONFIG_DEBUG_INFO_DWARF4=y # CONFIG_DEBUG_INFO_BTF is not set # CONFIG_GDB_SCRIPTS is not set CONFIG_ENABLE_MUST_CHECK=y CONFIG_FRAME_WARN=1280 # CONFIG_STRIP_ASM_SYMS is not set # CONFIG_READABLE_ASM is not set CONFIG_DEBUG_FS=y # CONFIG_HEADERS_INSTALL is not set CONFIG_OPTIMIZE_INLINING=y CONFIG_DEBUG_SECTION_MISMATCH=y # CONFIG_SECTION_MISMATCH_WARN_ONLY is not set CONFIG_STACK_VALIDATION=y # CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set # end of Compile-time checks and compiler options # CONFIG_MAGIC_SYSRQ is not set CONFIG_DEBUG_KERNEL=y # CONFIG_DEBUG_MISC is not set # # Memory Debugging # CONFIG_PAGE_EXTENSION=y CONFIG_DEBUG_PAGEALLOC=y CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT=y # CONFIG_PAGE_OWNER is not set CONFIG_PAGE_POISONING=y # CONFIG_PAGE_POISONING_NO_SANITY is not set # CONFIG_PAGE_POISONING_ZERO is not set # CONFIG_DEBUG_PAGE_REF is not set # CONFIG_DEBUG_RODATA_TEST is not set CONFIG_DEBUG_OBJECTS=y # CONFIG_DEBUG_OBJECTS_SELFTEST is not set CONFIG_DEBUG_OBJECTS_FREE=y CONFIG_DEBUG_OBJECTS_TIMERS=y CONFIG_DEBUG_OBJECTS_WORK=y CONFIG_DEBUG_OBJECTS_RCU_HEAD=y CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER=y CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1 CONFIG_SLUB_DEBUG_ON=y # CONFIG_SLUB_STATS is not set CONFIG_HAVE_DEBUG_KMEMLEAK=y CONFIG_DEBUG_KMEMLEAK=y CONFIG_DEBUG_KMEMLEAK_MEM_POOL_SIZE=16000 # CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF is not set # CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN is not set CONFIG_DEBUG_STACK_USAGE=y CONFIG_DEBUG_VM=y # CONFIG_DEBUG_VM_VMACACHE is not set # CONFIG_DEBUG_VM_RB is not set # CONFIG_DEBUG_VM_PGFLAGS is not set CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y # CONFIG_DEBUG_VIRTUAL is not set CONFIG_DEBUG_MEMORY_INIT=y # CONFIG_DEBUG_PER_CPU_MAPS is not set CONFIG_HAVE_ARCH_KASAN=y CONFIG_CC_HAS_KASAN_GENERIC=y CONFIG_KASAN=y CONFIG_KASAN_GENERIC=y # CONFIG_KASAN_OUTLINE is not set CONFIG_KASAN_INLINE=y CONFIG_KASAN_STACK=1 # end of Memory Debugging CONFIG_ARCH_HAS_KCOV=y CONFIG_CC_HAS_SANCOV_TRACE_PC=y # CONFIG_KCOV is not set CONFIG_DEBUG_SHIRQ=y # # Debug Lockups and Hangs # CONFIG_LOCKUP_DETECTOR=y CONFIG_SOFTLOCKUP_DETECTOR=y CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC=y CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=1 CONFIG_HARDLOCKUP_DETECTOR_PERF=y CONFIG_HARDLOCKUP_CHECK_TIMESTAMP=y CONFIG_HARDLOCKUP_DETECTOR=y CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y CONFIG_BOOTPARAM_HARDLOCKUP_PANIC_VALUE=1 CONFIG_DETECT_HUNG_TASK=y CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120 CONFIG_BOOTPARAM_HUNG_TASK_PANIC=y CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=1 CONFIG_WQ_WATCHDOG=y # end of Debug Lockups and Hangs CONFIG_PANIC_ON_OOPS=y CONFIG_PANIC_ON_OOPS_VALUE=1 CONFIG_PANIC_TIMEOUT=-1 CONFIG_SCHED_DEBUG=y CONFIG_SCHED_INFO=y CONFIG_SCHEDSTATS=y CONFIG_SCHED_STACK_END_CHECK=y CONFIG_DEBUG_TIMEKEEPING=y CONFIG_DEBUG_PREEMPT=y # # Lock Debugging (spinlocks, mutexes, etc...) # CONFIG_LOCK_DEBUGGING_SUPPORT=y CONFIG_PROVE_LOCKING=y # CONFIG_LOCK_STAT is not set CONFIG_DEBUG_RT_MUTEXES=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y CONFIG_DEBUG_RWSEMS=y CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_LOCKDEP=y # CONFIG_DEBUG_LOCKDEP is not set CONFIG_DEBUG_ATOMIC_SLEEP=y # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set # CONFIG_LOCK_TORTURE_TEST is not set # CONFIG_WW_MUTEX_SELFTEST is not set # end of Lock Debugging (spinlocks, mutexes, etc...) CONFIG_TRACE_IRQFLAGS=y CONFIG_STACKTRACE=y # CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set # CONFIG_DEBUG_KOBJECT is not set # CONFIG_DEBUG_KOBJECT_RELEASE is not set CONFIG_DEBUG_BUGVERBOSE=y CONFIG_DEBUG_LIST=y # CONFIG_DEBUG_PLIST is not set CONFIG_DEBUG_SG=y CONFIG_DEBUG_NOTIFIERS=y # CONFIG_DEBUG_CREDENTIALS is not set # # RCU Debugging # CONFIG_PROVE_RCU=y # CONFIG_RCU_PERF_TEST is not set # CONFIG_RCU_TORTURE_TEST is not set CONFIG_RCU_CPU_STALL_TIMEOUT=21 CONFIG_RCU_TRACE=y CONFIG_RCU_EQS_DEBUG=y # end of RCU Debugging # CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set # CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set # CONFIG_NOTIFIER_ERROR_INJECTION is not set # CONFIG_FAULT_INJECTION is not set # CONFIG_LATENCYTOP is not set CONFIG_USER_STACKTRACE_SUPPORT=y CONFIG_NOP_TRACER=y CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_FENTRY=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_PREEMPTIRQ_TRACEPOINTS=y CONFIG_TRACING=y CONFIG_TRACING_SUPPORT=y # CONFIG_FTRACE is not set # CONFIG_RUNTIME_TESTING_MENU is not set # CONFIG_MEMTEST is not set CONFIG_BUG_ON_DATA_CORRUPTION=y # CONFIG_SAMPLES is not set CONFIG_HAVE_ARCH_KGDB=y # CONFIG_KGDB is not set CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y CONFIG_UBSAN=y CONFIG_UBSAN_SANITIZE_ALL=y CONFIG_UBSAN_NO_ALIGNMENT=y CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y CONFIG_TRACE_IRQFLAGS_SUPPORT=y # CONFIG_X86_VERBOSE_BOOTUP is not set CONFIG_EARLY_PRINTK=y # CONFIG_X86_PTDUMP is not set # CONFIG_DEBUG_WX is not set CONFIG_DOUBLEFAULT=y # CONFIG_DEBUG_TLBFLUSH is not set CONFIG_HAVE_MMIOTRACE_SUPPORT=y # CONFIG_X86_DECODER_SELFTEST is not set CONFIG_IO_DELAY_0X80=y # CONFIG_IO_DELAY_0XED is not set # CONFIG_IO_DELAY_UDELAY is not set # CONFIG_IO_DELAY_NONE is not set # CONFIG_DEBUG_BOOT_PARAMS is not set # CONFIG_CPA_DEBUG is not set # CONFIG_DEBUG_ENTRY is not set # CONFIG_DEBUG_NMI_SELFTEST is not set CONFIG_X86_DEBUG_FPU=y CONFIG_UNWINDER_ORC=y # CONFIG_UNWINDER_FRAME_POINTER is not set # end of Kernel hacking

2 years, 8 months

3
4
0 0

FAILED: patch "[PATCH] KVM: x86/mmu: Move shadow-present check out of" failed to apply to 5.17-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.17-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 54eb3ef56f36827aad90915df33387d4c2b5df5a Mon Sep 17 00:00:00 2001 From: Sean Christopherson <seanjc(a)google.com> Date: Sat, 23 Apr 2022 03:47:42 +0000 Subject: [PATCH] KVM: x86/mmu: Move shadow-present check out of spte_has_volatile_bits() Move the is_shadow_present_pte() check out of spte_has_volatile_bits() and into its callers. Well, caller, since only one of its two callers doesn't already do the shadow-present check. Opportunistically move the helper to spte.c/h so that it can be used by the TDP MMU, which is also the primary motivation for the shadow-present change. Unlike the legacy MMU, the TDP MMU uses a single path for clear leaf and non-leaf SPTEs, and to avoid unnecessary atomic updates, the TDP MMU will need to check is_last_spte() prior to calling spte_has_volatile_bits(), and calling is_last_spte() without first calling is_shadow_present_spte() is at best odd, and at worst a violation of KVM's loosely defines SPTE rules. Note, mmu_spte_clear_track_bits() could likely skip the write entirely for SPTEs that are not shadow-present. Leave that cleanup for a future patch to avoid introducing a functional change, and because the shadow-present check can likely be moved further up the stack, e.g. drop_large_spte() appears to be the only path that doesn't already explicitly check for a shadow-present SPTE. No functional change intended. Cc: stable(a)vger.kernel.org Signed-off-by: Sean Christopherson <seanjc(a)google.com> Message-Id: <20220423034752.1161007-3-seanjc(a)google.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 48dcb6a782f4..311e4e1d7870 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -473,32 +473,6 @@ static u64 __get_spte_lockless(u64 *sptep) } #endif -static bool spte_has_volatile_bits(u64 spte) -{ - if (!is_shadow_present_pte(spte)) - return false; - - /* - * Always atomically update spte if it can be updated - * out of mmu-lock, it can ensure dirty bit is not lost, - * also, it can help us to get a stable is_writable_pte() - * to ensure tlb flush is not missed. - */ - if (!is_writable_pte(spte) && is_mmu_writable_spte(spte)) - return true; - - if (is_access_track_spte(spte)) - return true; - - if (spte_ad_enabled(spte)) { - if (!(spte & shadow_accessed_mask) || - (is_writable_pte(spte) && !(spte & shadow_dirty_mask))) - return true; - } - - return false; -} - /* Rules for using mmu_spte_set: * Set the sptep from nonpresent to present. * Note: the sptep being assigned *must* be either not present @@ -593,7 +567,8 @@ static int mmu_spte_clear_track_bits(struct kvm *kvm, u64 *sptep) u64 old_spte = *sptep; int level = sptep_to_sp(sptep)->role.level; - if (!spte_has_volatile_bits(old_spte)) + if (!is_shadow_present_pte(old_spte) || + !spte_has_volatile_bits(old_spte)) __update_clear_spte_fast(sptep, 0ull); else old_spte = __update_clear_spte_slow(sptep, 0ull); diff --git a/arch/x86/kvm/mmu/spte.c b/arch/x86/kvm/mmu/spte.c index 4739b53c9734..e5c0b6db6f2c 100644 --- a/arch/x86/kvm/mmu/spte.c +++ b/arch/x86/kvm/mmu/spte.c @@ -90,6 +90,34 @@ static bool kvm_is_mmio_pfn(kvm_pfn_t pfn) E820_TYPE_RAM); } +/* + * Returns true if the SPTE has bits that may be set without holding mmu_lock. + * The caller is responsible for checking if the SPTE is shadow-present, and + * for determining whether or not the caller cares about non-leaf SPTEs. + */ +bool spte_has_volatile_bits(u64 spte) +{ + /* + * Always atomically update spte if it can be updated + * out of mmu-lock, it can ensure dirty bit is not lost, + * also, it can help us to get a stable is_writable_pte() + * to ensure tlb flush is not missed. + */ + if (!is_writable_pte(spte) && is_mmu_writable_spte(spte)) + return true; + + if (is_access_track_spte(spte)) + return true; + + if (spte_ad_enabled(spte)) { + if (!(spte & shadow_accessed_mask) || + (is_writable_pte(spte) && !(spte & shadow_dirty_mask))) + return true; + } + + return false; +} + bool make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, const struct kvm_memory_slot *slot, unsigned int pte_access, gfn_t gfn, kvm_pfn_t pfn, diff --git a/arch/x86/kvm/mmu/spte.h b/arch/x86/kvm/mmu/spte.h index c571784cb567..80ab0f5cff01 100644 --- a/arch/x86/kvm/mmu/spte.h +++ b/arch/x86/kvm/mmu/spte.h @@ -404,6 +404,8 @@ static inline u64 get_mmio_spte_generation(u64 spte) return gen; } +bool spte_has_volatile_bits(u64 spte); + bool make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, const struct kvm_memory_slot *slot, unsigned int pte_access, gfn_t gfn, kvm_pfn_t pfn,

2 years, 8 months

1
0
0 0

FAILED: patch "[PATCH] KVM: x86/mmu: Don't treat fully writable SPTEs as volatile" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 706c9c55e5a32800605eb6a864ef6e1ca0c6c179 Mon Sep 17 00:00:00 2001 From: Sean Christopherson <seanjc(a)google.com> Date: Sat, 23 Apr 2022 03:47:41 +0000 Subject: [PATCH] KVM: x86/mmu: Don't treat fully writable SPTEs as volatile (modulo A/D) Don't treat SPTEs that are truly writable, i.e. writable in hardware, as being volatile (unless they're volatile for other reasons, e.g. A/D bits). KVM _sets_ the WRITABLE bit out of mmu_lock, but never _clears_ the bit out of mmu_lock, so if the WRITABLE bit is set, it cannot magically get cleared just because the SPTE is MMU-writable. Rename the wrapper of MMU-writable to be more literal, the previous name of spte_can_locklessly_be_made_writable() is wrong and misleading. Fixes: c7ba5b48cc8d ("KVM: MMU: fast path of handling guest page fault") Cc: stable(a)vger.kernel.org Signed-off-by: Sean Christopherson <seanjc(a)google.com> Message-Id: <20220423034752.1161007-2-seanjc(a)google.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 64a2a7e2be90..48dcb6a782f4 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -484,13 +484,15 @@ static bool spte_has_volatile_bits(u64 spte) * also, it can help us to get a stable is_writable_pte() * to ensure tlb flush is not missed. */ - if (spte_can_locklessly_be_made_writable(spte) || - is_access_track_spte(spte)) + if (!is_writable_pte(spte) && is_mmu_writable_spte(spte)) + return true; + + if (is_access_track_spte(spte)) return true; if (spte_ad_enabled(spte)) { - if ((spte & shadow_accessed_mask) == 0 || - (is_writable_pte(spte) && (spte & shadow_dirty_mask) == 0)) + if (!(spte & shadow_accessed_mask) || + (is_writable_pte(spte) && !(spte & shadow_dirty_mask))) return true; } @@ -557,7 +559,7 @@ static bool mmu_spte_update(u64 *sptep, u64 new_spte) * we always atomically update it, see the comments in * spte_has_volatile_bits(). */ - if (spte_can_locklessly_be_made_writable(old_spte) && + if (is_mmu_writable_spte(old_spte) && !is_writable_pte(new_spte)) flush = true; @@ -1187,7 +1189,7 @@ static bool spte_write_protect(u64 *sptep, bool pt_protect) u64 spte = *sptep; if (!is_writable_pte(spte) && - !(pt_protect && spte_can_locklessly_be_made_writable(spte))) + !(pt_protect && is_mmu_writable_spte(spte))) return false; rmap_printk("spte %p %llx\n", sptep, *sptep); @@ -3196,8 +3198,7 @@ static int fast_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault) * be removed in the fast path only if the SPTE was * write-protected for dirty-logging or access tracking. */ - if (fault->write && - spte_can_locklessly_be_made_writable(spte)) { + if (fault->write && is_mmu_writable_spte(spte)) { new_spte |= PT_WRITABLE_MASK; /* diff --git a/arch/x86/kvm/mmu/spte.h b/arch/x86/kvm/mmu/spte.h index e4abeb5df1b1..c571784cb567 100644 --- a/arch/x86/kvm/mmu/spte.h +++ b/arch/x86/kvm/mmu/spte.h @@ -390,7 +390,7 @@ static inline void check_spte_writable_invariants(u64 spte) "kvm: Writable SPTE is not MMU-writable: %llx", spte); } -static inline bool spte_can_locklessly_be_made_writable(u64 spte) +static inline bool is_mmu_writable_spte(u64 spte) { return spte & shadow_mmu_writable_mask; }

2 years, 8 months

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FAILED: patch "[PATCH] KVM: x86/mmu: Don't treat fully writable SPTEs as volatile" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 706c9c55e5a32800605eb6a864ef6e1ca0c6c179 Mon Sep 17 00:00:00 2001 From: Sean Christopherson <seanjc(a)google.com> Date: Sat, 23 Apr 2022 03:47:41 +0000 Subject: [PATCH] KVM: x86/mmu: Don't treat fully writable SPTEs as volatile (modulo A/D) Don't treat SPTEs that are truly writable, i.e. writable in hardware, as being volatile (unless they're volatile for other reasons, e.g. A/D bits). KVM _sets_ the WRITABLE bit out of mmu_lock, but never _clears_ the bit out of mmu_lock, so if the WRITABLE bit is set, it cannot magically get cleared just because the SPTE is MMU-writable. Rename the wrapper of MMU-writable to be more literal, the previous name of spte_can_locklessly_be_made_writable() is wrong and misleading. Fixes: c7ba5b48cc8d ("KVM: MMU: fast path of handling guest page fault") Cc: stable(a)vger.kernel.org Signed-off-by: Sean Christopherson <seanjc(a)google.com> Message-Id: <20220423034752.1161007-2-seanjc(a)google.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 64a2a7e2be90..48dcb6a782f4 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -484,13 +484,15 @@ static bool spte_has_volatile_bits(u64 spte) * also, it can help us to get a stable is_writable_pte() * to ensure tlb flush is not missed. */ - if (spte_can_locklessly_be_made_writable(spte) || - is_access_track_spte(spte)) + if (!is_writable_pte(spte) && is_mmu_writable_spte(spte)) + return true; + + if (is_access_track_spte(spte)) return true; if (spte_ad_enabled(spte)) { - if ((spte & shadow_accessed_mask) == 0 || - (is_writable_pte(spte) && (spte & shadow_dirty_mask) == 0)) + if (!(spte & shadow_accessed_mask) || + (is_writable_pte(spte) && !(spte & shadow_dirty_mask))) return true; } @@ -557,7 +559,7 @@ static bool mmu_spte_update(u64 *sptep, u64 new_spte) * we always atomically update it, see the comments in * spte_has_volatile_bits(). */ - if (spte_can_locklessly_be_made_writable(old_spte) && + if (is_mmu_writable_spte(old_spte) && !is_writable_pte(new_spte)) flush = true; @@ -1187,7 +1189,7 @@ static bool spte_write_protect(u64 *sptep, bool pt_protect) u64 spte = *sptep; if (!is_writable_pte(spte) && - !(pt_protect && spte_can_locklessly_be_made_writable(spte))) + !(pt_protect && is_mmu_writable_spte(spte))) return false; rmap_printk("spte %p %llx\n", sptep, *sptep); @@ -3196,8 +3198,7 @@ static int fast_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault) * be removed in the fast path only if the SPTE was * write-protected for dirty-logging or access tracking. */ - if (fault->write && - spte_can_locklessly_be_made_writable(spte)) { + if (fault->write && is_mmu_writable_spte(spte)) { new_spte |= PT_WRITABLE_MASK; /* diff --git a/arch/x86/kvm/mmu/spte.h b/arch/x86/kvm/mmu/spte.h index e4abeb5df1b1..c571784cb567 100644 --- a/arch/x86/kvm/mmu/spte.h +++ b/arch/x86/kvm/mmu/spte.h @@ -390,7 +390,7 @@ static inline void check_spte_writable_invariants(u64 spte) "kvm: Writable SPTE is not MMU-writable: %llx", spte); } -static inline bool spte_can_locklessly_be_made_writable(u64 spte) +static inline bool is_mmu_writable_spte(u64 spte) { return spte & shadow_mmu_writable_mask; }

2 years, 8 months

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FAILED: patch "[PATCH] KVM: x86/mmu: Don't treat fully writable SPTEs as volatile" failed to apply to 5.17-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.17-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 706c9c55e5a32800605eb6a864ef6e1ca0c6c179 Mon Sep 17 00:00:00 2001 From: Sean Christopherson <seanjc(a)google.com> Date: Sat, 23 Apr 2022 03:47:41 +0000 Subject: [PATCH] KVM: x86/mmu: Don't treat fully writable SPTEs as volatile (modulo A/D) Don't treat SPTEs that are truly writable, i.e. writable in hardware, as being volatile (unless they're volatile for other reasons, e.g. A/D bits). KVM _sets_ the WRITABLE bit out of mmu_lock, but never _clears_ the bit out of mmu_lock, so if the WRITABLE bit is set, it cannot magically get cleared just because the SPTE is MMU-writable. Rename the wrapper of MMU-writable to be more literal, the previous name of spte_can_locklessly_be_made_writable() is wrong and misleading. Fixes: c7ba5b48cc8d ("KVM: MMU: fast path of handling guest page fault") Cc: stable(a)vger.kernel.org Signed-off-by: Sean Christopherson <seanjc(a)google.com> Message-Id: <20220423034752.1161007-2-seanjc(a)google.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 64a2a7e2be90..48dcb6a782f4 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -484,13 +484,15 @@ static bool spte_has_volatile_bits(u64 spte) * also, it can help us to get a stable is_writable_pte() * to ensure tlb flush is not missed. */ - if (spte_can_locklessly_be_made_writable(spte) || - is_access_track_spte(spte)) + if (!is_writable_pte(spte) && is_mmu_writable_spte(spte)) + return true; + + if (is_access_track_spte(spte)) return true; if (spte_ad_enabled(spte)) { - if ((spte & shadow_accessed_mask) == 0 || - (is_writable_pte(spte) && (spte & shadow_dirty_mask) == 0)) + if (!(spte & shadow_accessed_mask) || + (is_writable_pte(spte) && !(spte & shadow_dirty_mask))) return true; } @@ -557,7 +559,7 @@ static bool mmu_spte_update(u64 *sptep, u64 new_spte) * we always atomically update it, see the comments in * spte_has_volatile_bits(). */ - if (spte_can_locklessly_be_made_writable(old_spte) && + if (is_mmu_writable_spte(old_spte) && !is_writable_pte(new_spte)) flush = true; @@ -1187,7 +1189,7 @@ static bool spte_write_protect(u64 *sptep, bool pt_protect) u64 spte = *sptep; if (!is_writable_pte(spte) && - !(pt_protect && spte_can_locklessly_be_made_writable(spte))) + !(pt_protect && is_mmu_writable_spte(spte))) return false; rmap_printk("spte %p %llx\n", sptep, *sptep); @@ -3196,8 +3198,7 @@ static int fast_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault) * be removed in the fast path only if the SPTE was * write-protected for dirty-logging or access tracking. */ - if (fault->write && - spte_can_locklessly_be_made_writable(spte)) { + if (fault->write && is_mmu_writable_spte(spte)) { new_spte |= PT_WRITABLE_MASK; /* diff --git a/arch/x86/kvm/mmu/spte.h b/arch/x86/kvm/mmu/spte.h index e4abeb5df1b1..c571784cb567 100644 --- a/arch/x86/kvm/mmu/spte.h +++ b/arch/x86/kvm/mmu/spte.h @@ -390,7 +390,7 @@ static inline void check_spte_writable_invariants(u64 spte) "kvm: Writable SPTE is not MMU-writable: %llx", spte); } -static inline bool spte_can_locklessly_be_made_writable(u64 spte) +static inline bool is_mmu_writable_spte(u64 spte) { return spte & shadow_mmu_writable_mask; }

2 years, 8 months

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FAILED: patch "[PATCH] x86/fpu: Prevent FPU state corruption" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 59f5ede3bc0f00eb856425f636dab0c10feb06d8 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner <tglx(a)linutronix.de> Date: Sun, 1 May 2022 21:31:43 +0200 Subject: [PATCH] x86/fpu: Prevent FPU state corruption The FPU usage related to task FPU management is either protected by disabling interrupts (switch_to, return to user) or via fpregs_lock() which is a wrapper around local_bh_disable(). When kernel code wants to use the FPU then it has to check whether it is possible by calling irq_fpu_usable(). But the condition in irq_fpu_usable() is wrong. It allows FPU to be used when: !in_interrupt() || interrupted_user_mode() || interrupted_kernel_fpu_idle() The latter is checking whether some other context already uses FPU in the kernel, but if that's not the case then it allows FPU to be used unconditionally even if the calling context interrupted a fpregs_lock() critical region. If that happens then the FPU state of the interrupted context becomes corrupted. Allow in kernel FPU usage only when no other context has in kernel FPU usage and either the calling context is not hard interrupt context or the hard interrupt did not interrupt a local bottomhalf disabled region. It's hard to find a proper Fixes tag as the condition was broken in one way or the other for a very long time and the eager/lazy FPU changes caused a lot of churn. Picked something remotely connected from the history. This survived undetected for quite some time as FPU usage in interrupt context is rare, but the recent changes to the random code unearthed it at least on a kernel which had FPU debugging enabled. There is probably a higher rate of silent corruption as not all issues can be detected by the FPU debugging code. This will be addressed in a subsequent change. Fixes: 5d2bd7009f30 ("x86, fpu: decouple non-lazy/eager fpu restore from xsave") Reported-by: Filipe Manana <fdmanana(a)suse.com> Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Tested-by: Filipe Manana <fdmanana(a)suse.com> Reviewed-by: Borislav Petkov <bp(a)suse.de> Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/20220501193102.588689270@linutronix.de diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index c049561f373a..e28ab0ecc537 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -41,17 +41,7 @@ struct fpu_state_config fpu_user_cfg __ro_after_init; */ struct fpstate init_fpstate __ro_after_init; -/* - * Track whether the kernel is using the FPU state - * currently. - * - * This flag is used: - * - * - by IRQ context code to potentially use the FPU - * if it's unused. - * - * - to debug kernel_fpu_begin()/end() correctness - */ +/* Track in-kernel FPU usage */ static DEFINE_PER_CPU(bool, in_kernel_fpu); /* @@ -59,42 +49,37 @@ static DEFINE_PER_CPU(bool, in_kernel_fpu); */ DEFINE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx); -static bool kernel_fpu_disabled(void) -{ - return this_cpu_read(in_kernel_fpu); -} - -static bool interrupted_kernel_fpu_idle(void) -{ - return !kernel_fpu_disabled(); -} - -/* - * Were we in user mode (or vm86 mode) when we were - * interrupted? - * - * Doing kernel_fpu_begin/end() is ok if we are running - * in an interrupt context from user mode - we'll just - * save the FPU state as required. - */ -static bool interrupted_user_mode(void) -{ - struct pt_regs *regs = get_irq_regs(); - return regs && user_mode(regs); -} - /* * Can we use the FPU in kernel mode with the * whole "kernel_fpu_begin/end()" sequence? - * - * It's always ok in process context (ie "not interrupt") - * but it is sometimes ok even from an irq. */ bool irq_fpu_usable(void) { - return !in_interrupt() || - interrupted_user_mode() || - interrupted_kernel_fpu_idle(); + if (WARN_ON_ONCE(in_nmi())) + return false; + + /* In kernel FPU usage already active? */ + if (this_cpu_read(in_kernel_fpu)) + return false; + + /* + * When not in NMI or hard interrupt context, FPU can be used in: + * + * - Task context except from within fpregs_lock()'ed critical + * regions. + * + * - Soft interrupt processing context which cannot happen + * while in a fpregs_lock()'ed critical region. + */ + if (!in_hardirq()) + return true; + + /* + * In hard interrupt context it's safe when soft interrupts + * are enabled, which means the interrupt did not hit in + * a fpregs_lock()'ed critical region. + */ + return !softirq_count(); } EXPORT_SYMBOL(irq_fpu_usable);

2 years, 8 months

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FAILED: patch "[PATCH] x86/fpu: Prevent FPU state corruption" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 59f5ede3bc0f00eb856425f636dab0c10feb06d8 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner <tglx(a)linutronix.de> Date: Sun, 1 May 2022 21:31:43 +0200 Subject: [PATCH] x86/fpu: Prevent FPU state corruption The FPU usage related to task FPU management is either protected by disabling interrupts (switch_to, return to user) or via fpregs_lock() which is a wrapper around local_bh_disable(). When kernel code wants to use the FPU then it has to check whether it is possible by calling irq_fpu_usable(). But the condition in irq_fpu_usable() is wrong. It allows FPU to be used when: !in_interrupt() || interrupted_user_mode() || interrupted_kernel_fpu_idle() The latter is checking whether some other context already uses FPU in the kernel, but if that's not the case then it allows FPU to be used unconditionally even if the calling context interrupted a fpregs_lock() critical region. If that happens then the FPU state of the interrupted context becomes corrupted. Allow in kernel FPU usage only when no other context has in kernel FPU usage and either the calling context is not hard interrupt context or the hard interrupt did not interrupt a local bottomhalf disabled region. It's hard to find a proper Fixes tag as the condition was broken in one way or the other for a very long time and the eager/lazy FPU changes caused a lot of churn. Picked something remotely connected from the history. This survived undetected for quite some time as FPU usage in interrupt context is rare, but the recent changes to the random code unearthed it at least on a kernel which had FPU debugging enabled. There is probably a higher rate of silent corruption as not all issues can be detected by the FPU debugging code. This will be addressed in a subsequent change. Fixes: 5d2bd7009f30 ("x86, fpu: decouple non-lazy/eager fpu restore from xsave") Reported-by: Filipe Manana <fdmanana(a)suse.com> Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Tested-by: Filipe Manana <fdmanana(a)suse.com> Reviewed-by: Borislav Petkov <bp(a)suse.de> Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/20220501193102.588689270@linutronix.de diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index c049561f373a..e28ab0ecc537 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -41,17 +41,7 @@ struct fpu_state_config fpu_user_cfg __ro_after_init; */ struct fpstate init_fpstate __ro_after_init; -/* - * Track whether the kernel is using the FPU state - * currently. - * - * This flag is used: - * - * - by IRQ context code to potentially use the FPU - * if it's unused. - * - * - to debug kernel_fpu_begin()/end() correctness - */ +/* Track in-kernel FPU usage */ static DEFINE_PER_CPU(bool, in_kernel_fpu); /* @@ -59,42 +49,37 @@ static DEFINE_PER_CPU(bool, in_kernel_fpu); */ DEFINE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx); -static bool kernel_fpu_disabled(void) -{ - return this_cpu_read(in_kernel_fpu); -} - -static bool interrupted_kernel_fpu_idle(void) -{ - return !kernel_fpu_disabled(); -} - -/* - * Were we in user mode (or vm86 mode) when we were - * interrupted? - * - * Doing kernel_fpu_begin/end() is ok if we are running - * in an interrupt context from user mode - we'll just - * save the FPU state as required. - */ -static bool interrupted_user_mode(void) -{ - struct pt_regs *regs = get_irq_regs(); - return regs && user_mode(regs); -} - /* * Can we use the FPU in kernel mode with the * whole "kernel_fpu_begin/end()" sequence? - * - * It's always ok in process context (ie "not interrupt") - * but it is sometimes ok even from an irq. */ bool irq_fpu_usable(void) { - return !in_interrupt() || - interrupted_user_mode() || - interrupted_kernel_fpu_idle(); + if (WARN_ON_ONCE(in_nmi())) + return false; + + /* In kernel FPU usage already active? */ + if (this_cpu_read(in_kernel_fpu)) + return false; + + /* + * When not in NMI or hard interrupt context, FPU can be used in: + * + * - Task context except from within fpregs_lock()'ed critical + * regions. + * + * - Soft interrupt processing context which cannot happen + * while in a fpregs_lock()'ed critical region. + */ + if (!in_hardirq()) + return true; + + /* + * In hard interrupt context it's safe when soft interrupts + * are enabled, which means the interrupt did not hit in + * a fpregs_lock()'ed critical region. + */ + return !softirq_count(); } EXPORT_SYMBOL(irq_fpu_usable);

2 years, 8 months

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FAILED: patch "[PATCH] x86/fpu: Prevent FPU state corruption" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 59f5ede3bc0f00eb856425f636dab0c10feb06d8 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner <tglx(a)linutronix.de> Date: Sun, 1 May 2022 21:31:43 +0200 Subject: [PATCH] x86/fpu: Prevent FPU state corruption The FPU usage related to task FPU management is either protected by disabling interrupts (switch_to, return to user) or via fpregs_lock() which is a wrapper around local_bh_disable(). When kernel code wants to use the FPU then it has to check whether it is possible by calling irq_fpu_usable(). But the condition in irq_fpu_usable() is wrong. It allows FPU to be used when: !in_interrupt() || interrupted_user_mode() || interrupted_kernel_fpu_idle() The latter is checking whether some other context already uses FPU in the kernel, but if that's not the case then it allows FPU to be used unconditionally even if the calling context interrupted a fpregs_lock() critical region. If that happens then the FPU state of the interrupted context becomes corrupted. Allow in kernel FPU usage only when no other context has in kernel FPU usage and either the calling context is not hard interrupt context or the hard interrupt did not interrupt a local bottomhalf disabled region. It's hard to find a proper Fixes tag as the condition was broken in one way or the other for a very long time and the eager/lazy FPU changes caused a lot of churn. Picked something remotely connected from the history. This survived undetected for quite some time as FPU usage in interrupt context is rare, but the recent changes to the random code unearthed it at least on a kernel which had FPU debugging enabled. There is probably a higher rate of silent corruption as not all issues can be detected by the FPU debugging code. This will be addressed in a subsequent change. Fixes: 5d2bd7009f30 ("x86, fpu: decouple non-lazy/eager fpu restore from xsave") Reported-by: Filipe Manana <fdmanana(a)suse.com> Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Tested-by: Filipe Manana <fdmanana(a)suse.com> Reviewed-by: Borislav Petkov <bp(a)suse.de> Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/20220501193102.588689270@linutronix.de diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index c049561f373a..e28ab0ecc537 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -41,17 +41,7 @@ struct fpu_state_config fpu_user_cfg __ro_after_init; */ struct fpstate init_fpstate __ro_after_init; -/* - * Track whether the kernel is using the FPU state - * currently. - * - * This flag is used: - * - * - by IRQ context code to potentially use the FPU - * if it's unused. - * - * - to debug kernel_fpu_begin()/end() correctness - */ +/* Track in-kernel FPU usage */ static DEFINE_PER_CPU(bool, in_kernel_fpu); /* @@ -59,42 +49,37 @@ static DEFINE_PER_CPU(bool, in_kernel_fpu); */ DEFINE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx); -static bool kernel_fpu_disabled(void) -{ - return this_cpu_read(in_kernel_fpu); -} - -static bool interrupted_kernel_fpu_idle(void) -{ - return !kernel_fpu_disabled(); -} - -/* - * Were we in user mode (or vm86 mode) when we were - * interrupted? - * - * Doing kernel_fpu_begin/end() is ok if we are running - * in an interrupt context from user mode - we'll just - * save the FPU state as required. - */ -static bool interrupted_user_mode(void) -{ - struct pt_regs *regs = get_irq_regs(); - return regs && user_mode(regs); -} - /* * Can we use the FPU in kernel mode with the * whole "kernel_fpu_begin/end()" sequence? - * - * It's always ok in process context (ie "not interrupt") - * but it is sometimes ok even from an irq. */ bool irq_fpu_usable(void) { - return !in_interrupt() || - interrupted_user_mode() || - interrupted_kernel_fpu_idle(); + if (WARN_ON_ONCE(in_nmi())) + return false; + + /* In kernel FPU usage already active? */ + if (this_cpu_read(in_kernel_fpu)) + return false; + + /* + * When not in NMI or hard interrupt context, FPU can be used in: + * + * - Task context except from within fpregs_lock()'ed critical + * regions. + * + * - Soft interrupt processing context which cannot happen + * while in a fpregs_lock()'ed critical region. + */ + if (!in_hardirq()) + return true; + + /* + * In hard interrupt context it's safe when soft interrupts + * are enabled, which means the interrupt did not hit in + * a fpregs_lock()'ed critical region. + */ + return !softirq_count(); } EXPORT_SYMBOL(irq_fpu_usable);

2 years, 8 months

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FAILED: patch "[PATCH] x86/fpu: Prevent FPU state corruption" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 59f5ede3bc0f00eb856425f636dab0c10feb06d8 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner <tglx(a)linutronix.de> Date: Sun, 1 May 2022 21:31:43 +0200 Subject: [PATCH] x86/fpu: Prevent FPU state corruption The FPU usage related to task FPU management is either protected by disabling interrupts (switch_to, return to user) or via fpregs_lock() which is a wrapper around local_bh_disable(). When kernel code wants to use the FPU then it has to check whether it is possible by calling irq_fpu_usable(). But the condition in irq_fpu_usable() is wrong. It allows FPU to be used when: !in_interrupt() || interrupted_user_mode() || interrupted_kernel_fpu_idle() The latter is checking whether some other context already uses FPU in the kernel, but if that's not the case then it allows FPU to be used unconditionally even if the calling context interrupted a fpregs_lock() critical region. If that happens then the FPU state of the interrupted context becomes corrupted. Allow in kernel FPU usage only when no other context has in kernel FPU usage and either the calling context is not hard interrupt context or the hard interrupt did not interrupt a local bottomhalf disabled region. It's hard to find a proper Fixes tag as the condition was broken in one way or the other for a very long time and the eager/lazy FPU changes caused a lot of churn. Picked something remotely connected from the history. This survived undetected for quite some time as FPU usage in interrupt context is rare, but the recent changes to the random code unearthed it at least on a kernel which had FPU debugging enabled. There is probably a higher rate of silent corruption as not all issues can be detected by the FPU debugging code. This will be addressed in a subsequent change. Fixes: 5d2bd7009f30 ("x86, fpu: decouple non-lazy/eager fpu restore from xsave") Reported-by: Filipe Manana <fdmanana(a)suse.com> Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Tested-by: Filipe Manana <fdmanana(a)suse.com> Reviewed-by: Borislav Petkov <bp(a)suse.de> Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/20220501193102.588689270@linutronix.de diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index c049561f373a..e28ab0ecc537 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -41,17 +41,7 @@ struct fpu_state_config fpu_user_cfg __ro_after_init; */ struct fpstate init_fpstate __ro_after_init; -/* - * Track whether the kernel is using the FPU state - * currently. - * - * This flag is used: - * - * - by IRQ context code to potentially use the FPU - * if it's unused. - * - * - to debug kernel_fpu_begin()/end() correctness - */ +/* Track in-kernel FPU usage */ static DEFINE_PER_CPU(bool, in_kernel_fpu); /* @@ -59,42 +49,37 @@ static DEFINE_PER_CPU(bool, in_kernel_fpu); */ DEFINE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx); -static bool kernel_fpu_disabled(void) -{ - return this_cpu_read(in_kernel_fpu); -} - -static bool interrupted_kernel_fpu_idle(void) -{ - return !kernel_fpu_disabled(); -} - -/* - * Were we in user mode (or vm86 mode) when we were - * interrupted? - * - * Doing kernel_fpu_begin/end() is ok if we are running - * in an interrupt context from user mode - we'll just - * save the FPU state as required. - */ -static bool interrupted_user_mode(void) -{ - struct pt_regs *regs = get_irq_regs(); - return regs && user_mode(regs); -} - /* * Can we use the FPU in kernel mode with the * whole "kernel_fpu_begin/end()" sequence? - * - * It's always ok in process context (ie "not interrupt") - * but it is sometimes ok even from an irq. */ bool irq_fpu_usable(void) { - return !in_interrupt() || - interrupted_user_mode() || - interrupted_kernel_fpu_idle(); + if (WARN_ON_ONCE(in_nmi())) + return false; + + /* In kernel FPU usage already active? */ + if (this_cpu_read(in_kernel_fpu)) + return false; + + /* + * When not in NMI or hard interrupt context, FPU can be used in: + * + * - Task context except from within fpregs_lock()'ed critical + * regions. + * + * - Soft interrupt processing context which cannot happen + * while in a fpregs_lock()'ed critical region. + */ + if (!in_hardirq()) + return true; + + /* + * In hard interrupt context it's safe when soft interrupts + * are enabled, which means the interrupt did not hit in + * a fpregs_lock()'ed critical region. + */ + return !softirq_count(); } EXPORT_SYMBOL(irq_fpu_usable);

2 years, 8 months

1
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0 0

FAILED: patch "[PATCH] x86/fpu: Prevent FPU state corruption" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 59f5ede3bc0f00eb856425f636dab0c10feb06d8 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner <tglx(a)linutronix.de> Date: Sun, 1 May 2022 21:31:43 +0200 Subject: [PATCH] x86/fpu: Prevent FPU state corruption The FPU usage related to task FPU management is either protected by disabling interrupts (switch_to, return to user) or via fpregs_lock() which is a wrapper around local_bh_disable(). When kernel code wants to use the FPU then it has to check whether it is possible by calling irq_fpu_usable(). But the condition in irq_fpu_usable() is wrong. It allows FPU to be used when: !in_interrupt() || interrupted_user_mode() || interrupted_kernel_fpu_idle() The latter is checking whether some other context already uses FPU in the kernel, but if that's not the case then it allows FPU to be used unconditionally even if the calling context interrupted a fpregs_lock() critical region. If that happens then the FPU state of the interrupted context becomes corrupted. Allow in kernel FPU usage only when no other context has in kernel FPU usage and either the calling context is not hard interrupt context or the hard interrupt did not interrupt a local bottomhalf disabled region. It's hard to find a proper Fixes tag as the condition was broken in one way or the other for a very long time and the eager/lazy FPU changes caused a lot of churn. Picked something remotely connected from the history. This survived undetected for quite some time as FPU usage in interrupt context is rare, but the recent changes to the random code unearthed it at least on a kernel which had FPU debugging enabled. There is probably a higher rate of silent corruption as not all issues can be detected by the FPU debugging code. This will be addressed in a subsequent change. Fixes: 5d2bd7009f30 ("x86, fpu: decouple non-lazy/eager fpu restore from xsave") Reported-by: Filipe Manana <fdmanana(a)suse.com> Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Tested-by: Filipe Manana <fdmanana(a)suse.com> Reviewed-by: Borislav Petkov <bp(a)suse.de> Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/20220501193102.588689270@linutronix.de diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index c049561f373a..e28ab0ecc537 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -41,17 +41,7 @@ struct fpu_state_config fpu_user_cfg __ro_after_init; */ struct fpstate init_fpstate __ro_after_init; -/* - * Track whether the kernel is using the FPU state - * currently. - * - * This flag is used: - * - * - by IRQ context code to potentially use the FPU - * if it's unused. - * - * - to debug kernel_fpu_begin()/end() correctness - */ +/* Track in-kernel FPU usage */ static DEFINE_PER_CPU(bool, in_kernel_fpu); /* @@ -59,42 +49,37 @@ static DEFINE_PER_CPU(bool, in_kernel_fpu); */ DEFINE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx); -static bool kernel_fpu_disabled(void) -{ - return this_cpu_read(in_kernel_fpu); -} - -static bool interrupted_kernel_fpu_idle(void) -{ - return !kernel_fpu_disabled(); -} - -/* - * Were we in user mode (or vm86 mode) when we were - * interrupted? - * - * Doing kernel_fpu_begin/end() is ok if we are running - * in an interrupt context from user mode - we'll just - * save the FPU state as required. - */ -static bool interrupted_user_mode(void) -{ - struct pt_regs *regs = get_irq_regs(); - return regs && user_mode(regs); -} - /* * Can we use the FPU in kernel mode with the * whole "kernel_fpu_begin/end()" sequence? - * - * It's always ok in process context (ie "not interrupt") - * but it is sometimes ok even from an irq. */ bool irq_fpu_usable(void) { - return !in_interrupt() || - interrupted_user_mode() || - interrupted_kernel_fpu_idle(); + if (WARN_ON_ONCE(in_nmi())) + return false; + + /* In kernel FPU usage already active? */ + if (this_cpu_read(in_kernel_fpu)) + return false; + + /* + * When not in NMI or hard interrupt context, FPU can be used in: + * + * - Task context except from within fpregs_lock()'ed critical + * regions. + * + * - Soft interrupt processing context which cannot happen + * while in a fpregs_lock()'ed critical region. + */ + if (!in_hardirq()) + return true; + + /* + * In hard interrupt context it's safe when soft interrupts + * are enabled, which means the interrupt did not hit in + * a fpregs_lock()'ed critical region. + */ + return !softirq_count(); } EXPORT_SYMBOL(irq_fpu_usable);

2 years, 8 months

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