February 2023 - Linux-stable-mirror

[PATCH 2/2] riscv: asid: Fixup stale TLB entry cause application crash

by Sergey Matyukevich

From: Guo Ren <guoren(a)linux.alibaba.com> After use_asid_allocator is enabled, the userspace application will crash by stale TLB entries. Because only using cpumask_clear_cpu without local_flush_tlb_all couldn't guarantee CPU's TLB entries were fresh. Then set_mm_asid would cause the user space application to get a stale value by stale TLB entry, but set_mm_noasid is okay. Here is the symptom of the bug: unhandled signal 11 code 0x1 (coredump) 0x0000003fd6d22524 <+4>: auipc s0,0x70 0x0000003fd6d22528 <+8>: ld s0,-148(s0) # 0x3fd6d92490 => 0x0000003fd6d2252c <+12>: ld a5,0(s0) (gdb) i r s0 s0 0x8082ed1cc3198b21 0x8082ed1cc3198b21 (gdb) x /2x 0x3fd6d92490 0x3fd6d92490: 0xd80ac8a8 0x0000003f The core dump file shows that register s0 is wrong, but the value in memory is correct. Because 'ld s0, -148(s0)' used a stale mapping entry in TLB and got a wrong result from an incorrect physical address. When the task ran on CPU0, which loaded/speculative-loaded the value of address(0x3fd6d92490), then the first version of the mapping entry was PTWed into CPU0's TLB. When the task switched from CPU0 to CPU1 (No local_tlb_flush_all here by asid), it happened to write a value on the address (0x3fd6d92490). It caused do_page_fault -> wp_page_copy -> ptep_clear_flush -> ptep_get_and_clear & flush_tlb_page. The flush_tlb_page used mm_cpumask(mm) to determine which CPUs need TLB flush, but CPU0 had cleared the CPU0's mm_cpumask in the previous switch_mm. So we only flushed the CPU1 TLB and set the second version mapping of the PTE. When the task switched from CPU1 to CPU0 again, CPU0 still used a stale TLB mapping entry which contained a wrong target physical address. It raised a bug when the task happened to read that value. CPU0 CPU1 - switch 'task' in - read addr (Fill stale mapping entry into TLB) - switch 'task' out (no tlb_flush) - switch 'task' in (no tlb_flush) - write addr cause pagefault do_page_fault() (change to new addr mapping) wp_page_copy() ptep_clear_flush() ptep_get_and_clear() & flush_tlb_page() write new value into addr - switch 'task' out (no tlb_flush) - switch 'task' in (no tlb_flush) - read addr again (Use stale mapping entry in TLB) get wrong value from old phyical addr, BUG! The solution is to keep all CPUs' footmarks of cpumask(mm) in switch_mm, which could guarantee to invalidate all stale TLB entries during TLB flush. Fixes: 65d4b9c53017 ("RISC-V: Implement ASID allocator") Signed-off-by: Guo Ren <guoren(a)linux.alibaba.com> Signed-off-by: Guo Ren <guoren(a)kernel.org> Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj(a)bp.renesas.com> Tested-by: Zong Li <zong.li(a)sifive.com> Tested-by: Sergey Matyukevich <sergey.matyukevich(a)syntacore.com> Cc: Anup Patel <apatel(a)ventanamicro.com> Cc: Palmer Dabbelt <palmer(a)rivosinc.com> Cc: stable(a)vger.kernel.org --- arch/riscv/mm/context.c | 30 ++++++++++++++++++++---------- 1 file changed, 20 insertions(+), 10 deletions(-) diff --git a/arch/riscv/mm/context.c b/arch/riscv/mm/context.c index 7acbfbd14557..0f784e3d307b 100644 --- a/arch/riscv/mm/context.c +++ b/arch/riscv/mm/context.c @@ -205,12 +205,24 @@ static void set_mm_noasid(struct mm_struct *mm) local_flush_tlb_all(); } -static inline void set_mm(struct mm_struct *mm, unsigned int cpu) +static inline void set_mm(struct mm_struct *prev, + struct mm_struct *next, unsigned int cpu) { - if (static_branch_unlikely(&use_asid_allocator)) - set_mm_asid(mm, cpu); - else - set_mm_noasid(mm); + /* + * The mm_cpumask indicates which harts' TLBs contain the virtual + * address mapping of the mm. Compared to noasid, using asid + * can't guarantee that stale TLB entries are invalidated because + * the asid mechanism wouldn't flush TLB for every switch_mm for + * performance. So when using asid, keep all CPUs footmarks in + * cpumask() until mm reset. + */ + cpumask_set_cpu(cpu, mm_cpumask(next)); + if (static_branch_unlikely(&use_asid_allocator)) { + set_mm_asid(next, cpu); + } else { + cpumask_clear_cpu(cpu, mm_cpumask(prev)); + set_mm_noasid(next); + } } static int __init asids_init(void) @@ -264,7 +276,8 @@ static int __init asids_init(void) } early_initcall(asids_init); #else -static inline void set_mm(struct mm_struct *mm, unsigned int cpu) +static inline void set_mm(struct mm_struct *prev, + struct mm_struct *next, unsigned int cpu) { /* Nothing to do here when there is no MMU */ } @@ -317,10 +330,7 @@ void switch_mm(struct mm_struct *prev, struct mm_struct *next, */ cpu = smp_processor_id(); - cpumask_clear_cpu(cpu, mm_cpumask(prev)); - cpumask_set_cpu(cpu, mm_cpumask(next)); - - set_mm(next, cpu); + set_mm(prev, next, cpu); flush_icache_deferred(next, cpu); } -- 2.39.2

2 years, 4 months

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[PATCH v4] panic: Fixes the panic_print NMI backtrace setting

by Guilherme G. Piccoli

Commit 8d470a45d1a6 ("panic: add option to dump all CPUs backtraces in panic_print") introduced a setting for the "panic_print" kernel parameter to allow users to request a NMI backtrace on panic. Problem is that the panic_print handling happens after the secondary CPUs are already disabled, hence this option ended-up being kind of a no-op - kernel skips the NMI trace in idling CPUs, which is the case of offline CPUs. Fix it by checking the NMI backtrace bit in the panic_print prior to the CPU disabling function. Fixes: 8d470a45d1a6 ("panic: add option to dump all CPUs backtraces in panic_print") Cc: stable(a)vger.kernel.org Signed-off-by: Guilherme G. Piccoli <gpiccoli(a)igalia.com> --- V4: - Sent as standalone patch, rebased against v6.2-rc7. V2 / V3: - New patch, there was no V1 of this one. Link for V3: https://lore.kernel.org/lkml/20220819221731.480795-12-gpiccoli@igalia.com/ Hi folks, thanks in advance for reviews/comments. Notice that while at it, I got rid of the "crash_kexec_post_notifiers" local copy in panic(). This was introduced by commit b26e27ddfd2a ("kexec: use core_param for crash_kexec_post_notifiers boot option"), but it is not clear from comments or commit message why this local copy is required. My understanding is that it's a mechanism to prevent some concurrency, in case some other CPU modify this variable while panic() is running. I find it very unlikely, hence I removed it - but if people consider this copy needed, I can respin this patch and keep it, even providing a comment about that, in order to be explict about its need. Let me know your thoughts! Cheers, Guilherme kernel/panic.c | 47 +++++++++++++++++++++++++++-------------------- 1 file changed, 27 insertions(+), 20 deletions(-) diff --git a/kernel/panic.c b/kernel/panic.c index 463c9295bc28..f45ee88be8a2 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -211,9 +211,6 @@ static void panic_print_sys_info(bool console_flush) return; } - if (panic_print & PANIC_PRINT_ALL_CPU_BT) - trigger_all_cpu_backtrace(); - if (panic_print & PANIC_PRINT_TASK_INFO) show_state(); @@ -243,6 +240,30 @@ void check_panic_on_warn(const char *origin) origin, limit); } +/* + * Helper that triggers the NMI backtrace (if set in panic_print) + * and then performs the secondary CPUs shutdown - we cannot have + * the NMI backtrace after the CPUs are off! + */ +static void panic_other_cpus_shutdown(void) +{ + if (panic_print & PANIC_PRINT_ALL_CPU_BT) + trigger_all_cpu_backtrace(); + + /* + * Note that smp_send_stop() is the usual SMP shutdown function, + * which unfortunately may not be hardened to work in a panic + * situation. If we want to do crash dump after notifier calls + * and kmsg_dump, we will need architecture dependent extra + * bits in addition to stopping other CPUs, hence we rely on + * crash_smp_send_stop() for that. + */ + if (!crash_kexec_post_notifiers) + smp_send_stop(); + else + crash_smp_send_stop(); +} + /** * panic - halt the system * @fmt: The text string to print @@ -258,7 +279,6 @@ void panic(const char *fmt, ...) long i, i_next = 0, len; int state = 0; int old_cpu, this_cpu; - bool _crash_kexec_post_notifiers = crash_kexec_post_notifiers; if (panic_on_warn) { /* @@ -333,23 +353,10 @@ void panic(const char *fmt, ...) * * Bypass the panic_cpu check and call __crash_kexec directly. */ - if (!_crash_kexec_post_notifiers) { + if (!crash_kexec_post_notifiers) __crash_kexec(NULL); - /* - * Note smp_send_stop is the usual smp shutdown function, which - * unfortunately means it may not be hardened to work in a - * panic situation. - */ - smp_send_stop(); - } else { - /* - * If we want to do crash dump after notifier calls and - * kmsg_dump, we will need architecture dependent extra - * works in addition to stopping other CPUs. - */ - crash_smp_send_stop(); - } + panic_other_cpus_shutdown(); /* * Run any panic handlers, including those that might need to @@ -370,7 +377,7 @@ void panic(const char *fmt, ...) * * Bypass the panic_cpu check and call __crash_kexec directly. */ - if (_crash_kexec_post_notifiers) + if (crash_kexec_post_notifiers) __crash_kexec(NULL); console_unblank(); -- 2.39.1

2 years, 4 months

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[PATCH v5] panic: Fixes the panic_print NMI backtrace setting

by Guilherme G. Piccoli

Commit 8d470a45d1a6 ("panic: add option to dump all CPUs backtraces in panic_print") introduced a setting for the "panic_print" kernel parameter to allow users to request a NMI backtrace on panic. Problem is that the panic_print handling happens after the secondary CPUs are already disabled, hence this option ended-up being kind of a no-op - kernel skips the NMI trace in idling CPUs, which is the case of offline CPUs. Fix it by checking the NMI backtrace bit in the panic_print prior to the CPU disabling function. Fixes: 8d470a45d1a6 ("panic: add option to dump all CPUs backtraces in panic_print") Cc: stable(a)vger.kernel.org Signed-off-by: Guilherme G. Piccoli <gpiccoli(a)igalia.com> --- V5: - Kept the local version of "crash_kexec_post_notifiers", since this is standalone fix that should be backported to stable. Hence, it's not a good idea to mess with it in this patch (thanks Andrew!). V4: - Sent as standalone patch, rebased against v6.2-rc7. - Link: https://lore.kernel.org/lkml/20230210203510.1734835-1-gpiccoli@igalia.com/ kernel/panic.c | 44 ++++++++++++++++++++++++++------------------ 1 file changed, 26 insertions(+), 18 deletions(-) diff --git a/kernel/panic.c b/kernel/panic.c index 463c9295bc28..e026191a0a07 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -211,9 +211,6 @@ static void panic_print_sys_info(bool console_flush) return; } - if (panic_print & PANIC_PRINT_ALL_CPU_BT) - trigger_all_cpu_backtrace(); - if (panic_print & PANIC_PRINT_TASK_INFO) show_state(); @@ -243,6 +240,30 @@ void check_panic_on_warn(const char *origin) origin, limit); } +/* + * Helper that triggers the NMI backtrace (if set in panic_print) + * and then performs the secondary CPUs shutdown - we cannot have + * the NMI backtrace after the CPUs are off! + */ +static void panic_other_cpus_shutdown(bool crash_kexec) +{ + if (panic_print & PANIC_PRINT_ALL_CPU_BT) + trigger_all_cpu_backtrace(); + + /* + * Note that smp_send_stop() is the usual SMP shutdown function, + * which unfortunately may not be hardened to work in a panic + * situation. If we want to do crash dump after notifier calls + * and kmsg_dump, we will need architecture dependent extra + * bits in addition to stopping other CPUs, hence we rely on + * crash_smp_send_stop() for that. + */ + if (!crash_kexec) + smp_send_stop(); + else + crash_smp_send_stop(); +} + /** * panic - halt the system * @fmt: The text string to print @@ -333,23 +354,10 @@ void panic(const char *fmt, ...) * * Bypass the panic_cpu check and call __crash_kexec directly. */ - if (!_crash_kexec_post_notifiers) { + if (!_crash_kexec_post_notifiers) __crash_kexec(NULL); - /* - * Note smp_send_stop is the usual smp shutdown function, which - * unfortunately means it may not be hardened to work in a - * panic situation. - */ - smp_send_stop(); - } else { - /* - * If we want to do crash dump after notifier calls and - * kmsg_dump, we will need architecture dependent extra - * works in addition to stopping other CPUs. - */ - crash_smp_send_stop(); - } + panic_other_cpus_shutdown(_crash_kexec_post_notifiers); /* * Run any panic handlers, including those that might need to -- 2.39.1

2 years, 4 months

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Investment proposition

by Franklin C. James QC

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2 years, 4 months

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[PATCH AUTOSEL 4.14 01/11] wifi: brcmfmac: Fix potential stack-out-of-bounds in brcmf_c_preinit_dcmds()

by Sasha Levin

From: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> [ Upstream commit 0a06cadcc2a0044e4a117cc0e61436fc3a0dad69 ] This patch fixes a stack-out-of-bounds read in brcmfmac that occurs when 'buf' that is not null-terminated is passed as an argument of strsep() in brcmf_c_preinit_dcmds(). This buffer is filled with a firmware version string by memcpy() in brcmf_fil_iovar_data_get(). The patch ensures buf is null-terminated. Found by a modified version of syzkaller. [ 47.569679][ T1897] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43236b for chip BCM43236/3 [ 47.582839][ T1897] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available [ 47.601565][ T1897] ================================================================== [ 47.602574][ T1897] BUG: KASAN: stack-out-of-bounds in strsep+0x1b2/0x1f0 [ 47.603447][ T1897] Read of size 1 at addr ffffc90001f6f000 by task kworker/0:2/1897 [ 47.604336][ T1897] [ 47.604621][ T1897] CPU: 0 PID: 1897 Comm: kworker/0:2 Tainted: G O 5.14.0+ #131 [ 47.605617][ T1897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 47.606907][ T1897] Workqueue: usb_hub_wq hub_event [ 47.607453][ T1897] Call Trace: [ 47.607801][ T1897] dump_stack_lvl+0x8e/0xd1 [ 47.608295][ T1897] print_address_description.constprop.0.cold+0xf/0x334 [ 47.609009][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609434][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609863][ T1897] kasan_report.cold+0x83/0xdf [ 47.610366][ T1897] ? strsep+0x1b2/0x1f0 [ 47.610882][ T1897] strsep+0x1b2/0x1f0 [ 47.611300][ T1897] ? brcmf_fil_iovar_data_get+0x3a/0xf0 [ 47.611883][ T1897] brcmf_c_preinit_dcmds+0x995/0xc40 [ 47.612434][ T1897] ? brcmf_c_set_joinpref_default+0x100/0x100 [ 47.613078][ T1897] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 47.613662][ T1897] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 47.614208][ T1897] ? lock_acquire+0x19d/0x4e0 [ 47.614704][ T1897] ? find_held_lock+0x2d/0x110 [ 47.615236][ T1897] ? brcmf_usb_deq+0x1a7/0x260 [ 47.615741][ T1897] ? brcmf_usb_rx_fill_all+0x5a/0xf0 [ 47.616288][ T1897] brcmf_attach+0x246/0xd40 [ 47.616758][ T1897] ? wiphy_new_nm+0x1703/0x1dd0 [ 47.617280][ T1897] ? kmemdup+0x43/0x50 [ 47.617720][ T1897] brcmf_usb_probe+0x12de/0x1690 [ 47.618244][ T1897] ? brcmf_usbdev_qinit.constprop.0+0x470/0x470 [ 47.618901][ T1897] usb_probe_interface+0x2aa/0x760 [ 47.619429][ T1897] ? usb_probe_device+0x250/0x250 [ 47.619950][ T1897] really_probe+0x205/0xb70 [ 47.620435][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.621048][ T1897] __driver_probe_device+0x311/0x4b0 [ 47.621595][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.622209][ T1897] driver_probe_device+0x4e/0x150 [ 47.622739][ T1897] __device_attach_driver+0x1cc/0x2a0 [ 47.623287][ T1897] bus_for_each_drv+0x156/0x1d0 [ 47.623796][ T1897] ? bus_rescan_devices+0x30/0x30 [ 47.624309][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.624907][ T1897] ? trace_hardirqs_on+0x46/0x160 [ 47.625437][ T1897] __device_attach+0x23f/0x3a0 [ 47.625924][ T1897] ? device_bind_driver+0xd0/0xd0 [ 47.626433][ T1897] ? kobject_uevent_env+0x287/0x14b0 [ 47.627057][ T1897] bus_probe_device+0x1da/0x290 [ 47.627557][ T1897] device_add+0xb7b/0x1eb0 [ 47.628027][ T1897] ? wait_for_completion+0x290/0x290 [ 47.628593][ T1897] ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0 [ 47.629249][ T1897] usb_set_configuration+0xf59/0x16f0 [ 47.629829][ T1897] usb_generic_driver_probe+0x82/0xa0 [ 47.630385][ T1897] usb_probe_device+0xbb/0x250 [ 47.630927][ T1897] ? usb_suspend+0x590/0x590 [ 47.631397][ T1897] really_probe+0x205/0xb70 [ 47.631855][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.632469][ T1897] __driver_probe_device+0x311/0x4b0 [ 47.633002][ T1897] ? usb_generic_driver_match+0x75/0x90 [ 47.633573][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.634170][ T1897] driver_probe_device+0x4e/0x150 [ 47.634703][ T1897] __device_attach_driver+0x1cc/0x2a0 [ 47.635248][ T1897] bus_for_each_drv+0x156/0x1d0 [ 47.635748][ T1897] ? bus_rescan_devices+0x30/0x30 [ 47.636271][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.636881][ T1897] ? trace_hardirqs_on+0x46/0x160 [ 47.637396][ T1897] __device_attach+0x23f/0x3a0 [ 47.637904][ T1897] ? device_bind_driver+0xd0/0xd0 [ 47.638426][ T1897] ? kobject_uevent_env+0x287/0x14b0 [ 47.638985][ T1897] bus_probe_device+0x1da/0x290 [ 47.639512][ T1897] device_add+0xb7b/0x1eb0 [ 47.639977][ T1897] ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0 [ 47.640612][ T1897] ? kfree+0x14a/0x6b0 [ 47.641055][ T1897] ? __usb_get_extra_descriptor+0x116/0x160 [ 47.641679][ T1897] usb_new_device.cold+0x49c/0x1029 [ 47.642245][ T1897] ? hub_disconnect+0x450/0x450 [ 47.642756][ T1897] ? rwlock_bug.part.0+0x90/0x90 [ 47.643273][ T1897] ? _raw_spin_unlock_irq+0x24/0x30 [ 47.643822][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.644445][ T1897] hub_event+0x1c98/0x3950 [ 47.644939][ T1897] ? hub_port_debounce+0x2e0/0x2e0 [ 47.645467][ T1897] ? check_irq_usage+0x861/0xf20 [ 47.645975][ T1897] ? drain_workqueue+0x280/0x360 [ 47.646506][ T1897] ? lock_release+0x640/0x640 [ 47.646994][ T1897] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 47.647572][ T1897] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 47.648111][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.648735][ T1897] process_one_work+0x92b/0x1460 [ 47.649262][ T1897] ? pwq_dec_nr_in_flight+0x330/0x330 [ 47.649816][ T1897] ? rwlock_bug.part.0+0x90/0x90 [ 47.650336][ T1897] worker_thread+0x95/0xe00 [ 47.650830][ T1897] ? __kthread_parkme+0x115/0x1e0 [ 47.651361][ T1897] ? process_one_work+0x1460/0x1460 [ 47.651904][ T1897] kthread+0x3a1/0x480 [ 47.652329][ T1897] ? set_kthread_struct+0x120/0x120 [ 47.652878][ T1897] ret_from_fork+0x1f/0x30 [ 47.653370][ T1897] [ 47.653608][ T1897] [ 47.653848][ T1897] addr ffffc90001f6f000 is located in stack of task kworker/0:2/1897 at offset 512 in frame: [ 47.654891][ T1897] brcmf_c_preinit_dcmds+0x0/0xc40 [ 47.655442][ T1897] [ 47.655690][ T1897] this frame has 4 objects: [ 47.656151][ T1897] [48, 56) 'ptr' [ 47.656159][ T1897] [80, 148) 'revinfo' [ 47.656534][ T1897] [192, 210) 'eventmask' [ 47.656953][ T1897] [256, 512) 'buf' [ 47.657410][ T1897] [ 47.658035][ T1897] Memory state around the buggy address: [ 47.658743][ T1897] ffffc90001f6ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.659577][ T1897] ffffc90001f6ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.660394][ T1897] >ffffc90001f6f000: f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 [ 47.661199][ T1897] ^ [ 47.661625][ T1897] ffffc90001f6f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.662455][ T1897] ffffc90001f6f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 [ 47.663318][ T1897] ================================================================== [ 47.664147][ T1897] Disabling lock debugging due to kernel taint Reported-by: Dokyung Song <dokyungs(a)yonsei.ac.kr> Reported-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Reported-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Signed-off-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Signed-off-by: Kalle Valo <kvalo(a)kernel.org> Link: https://lore.kernel.org/r/20221115043458.37562-1-jisoo.jang@yonsei.ac.kr Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c index 7a2b49587b4d3..b2f46685391c2 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c @@ -157,6 +157,7 @@ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) err); goto done; } + buf[sizeof(buf) - 1] = '\0'; ptr = (char *)buf; strsep(&ptr, "\n"); -- 2.39.0

2 years, 4 months

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[PATCH AUTOSEL 4.19 01/13] wifi: brcmfmac: Fix potential stack-out-of-bounds in brcmf_c_preinit_dcmds()

by Sasha Levin

From: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> [ Upstream commit 0a06cadcc2a0044e4a117cc0e61436fc3a0dad69 ] This patch fixes a stack-out-of-bounds read in brcmfmac that occurs when 'buf' that is not null-terminated is passed as an argument of strsep() in brcmf_c_preinit_dcmds(). This buffer is filled with a firmware version string by memcpy() in brcmf_fil_iovar_data_get(). The patch ensures buf is null-terminated. Found by a modified version of syzkaller. [ 47.569679][ T1897] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43236b for chip BCM43236/3 [ 47.582839][ T1897] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available [ 47.601565][ T1897] ================================================================== [ 47.602574][ T1897] BUG: KASAN: stack-out-of-bounds in strsep+0x1b2/0x1f0 [ 47.603447][ T1897] Read of size 1 at addr ffffc90001f6f000 by task kworker/0:2/1897 [ 47.604336][ T1897] [ 47.604621][ T1897] CPU: 0 PID: 1897 Comm: kworker/0:2 Tainted: G O 5.14.0+ #131 [ 47.605617][ T1897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 47.606907][ T1897] Workqueue: usb_hub_wq hub_event [ 47.607453][ T1897] Call Trace: [ 47.607801][ T1897] dump_stack_lvl+0x8e/0xd1 [ 47.608295][ T1897] print_address_description.constprop.0.cold+0xf/0x334 [ 47.609009][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609434][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609863][ T1897] kasan_report.cold+0x83/0xdf [ 47.610366][ T1897] ? strsep+0x1b2/0x1f0 [ 47.610882][ T1897] strsep+0x1b2/0x1f0 [ 47.611300][ T1897] ? brcmf_fil_iovar_data_get+0x3a/0xf0 [ 47.611883][ T1897] brcmf_c_preinit_dcmds+0x995/0xc40 [ 47.612434][ T1897] ? brcmf_c_set_joinpref_default+0x100/0x100 [ 47.613078][ T1897] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 47.613662][ T1897] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 47.614208][ T1897] ? lock_acquire+0x19d/0x4e0 [ 47.614704][ T1897] ? find_held_lock+0x2d/0x110 [ 47.615236][ T1897] ? brcmf_usb_deq+0x1a7/0x260 [ 47.615741][ T1897] ? brcmf_usb_rx_fill_all+0x5a/0xf0 [ 47.616288][ T1897] brcmf_attach+0x246/0xd40 [ 47.616758][ T1897] ? wiphy_new_nm+0x1703/0x1dd0 [ 47.617280][ T1897] ? kmemdup+0x43/0x50 [ 47.617720][ T1897] brcmf_usb_probe+0x12de/0x1690 [ 47.618244][ T1897] ? brcmf_usbdev_qinit.constprop.0+0x470/0x470 [ 47.618901][ T1897] usb_probe_interface+0x2aa/0x760 [ 47.619429][ T1897] ? usb_probe_device+0x250/0x250 [ 47.619950][ T1897] really_probe+0x205/0xb70 [ 47.620435][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.621048][ T1897] __driver_probe_device+0x311/0x4b0 [ 47.621595][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.622209][ T1897] driver_probe_device+0x4e/0x150 [ 47.622739][ T1897] __device_attach_driver+0x1cc/0x2a0 [ 47.623287][ T1897] bus_for_each_drv+0x156/0x1d0 [ 47.623796][ T1897] ? bus_rescan_devices+0x30/0x30 [ 47.624309][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.624907][ T1897] ? trace_hardirqs_on+0x46/0x160 [ 47.625437][ T1897] __device_attach+0x23f/0x3a0 [ 47.625924][ T1897] ? device_bind_driver+0xd0/0xd0 [ 47.626433][ T1897] ? kobject_uevent_env+0x287/0x14b0 [ 47.627057][ T1897] bus_probe_device+0x1da/0x290 [ 47.627557][ T1897] device_add+0xb7b/0x1eb0 [ 47.628027][ T1897] ? wait_for_completion+0x290/0x290 [ 47.628593][ T1897] ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0 [ 47.629249][ T1897] usb_set_configuration+0xf59/0x16f0 [ 47.629829][ T1897] usb_generic_driver_probe+0x82/0xa0 [ 47.630385][ T1897] usb_probe_device+0xbb/0x250 [ 47.630927][ T1897] ? usb_suspend+0x590/0x590 [ 47.631397][ T1897] really_probe+0x205/0xb70 [ 47.631855][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.632469][ T1897] __driver_probe_device+0x311/0x4b0 [ 47.633002][ T1897] ? usb_generic_driver_match+0x75/0x90 [ 47.633573][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.634170][ T1897] driver_probe_device+0x4e/0x150 [ 47.634703][ T1897] __device_attach_driver+0x1cc/0x2a0 [ 47.635248][ T1897] bus_for_each_drv+0x156/0x1d0 [ 47.635748][ T1897] ? bus_rescan_devices+0x30/0x30 [ 47.636271][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.636881][ T1897] ? trace_hardirqs_on+0x46/0x160 [ 47.637396][ T1897] __device_attach+0x23f/0x3a0 [ 47.637904][ T1897] ? device_bind_driver+0xd0/0xd0 [ 47.638426][ T1897] ? kobject_uevent_env+0x287/0x14b0 [ 47.638985][ T1897] bus_probe_device+0x1da/0x290 [ 47.639512][ T1897] device_add+0xb7b/0x1eb0 [ 47.639977][ T1897] ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0 [ 47.640612][ T1897] ? kfree+0x14a/0x6b0 [ 47.641055][ T1897] ? __usb_get_extra_descriptor+0x116/0x160 [ 47.641679][ T1897] usb_new_device.cold+0x49c/0x1029 [ 47.642245][ T1897] ? hub_disconnect+0x450/0x450 [ 47.642756][ T1897] ? rwlock_bug.part.0+0x90/0x90 [ 47.643273][ T1897] ? _raw_spin_unlock_irq+0x24/0x30 [ 47.643822][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.644445][ T1897] hub_event+0x1c98/0x3950 [ 47.644939][ T1897] ? hub_port_debounce+0x2e0/0x2e0 [ 47.645467][ T1897] ? check_irq_usage+0x861/0xf20 [ 47.645975][ T1897] ? drain_workqueue+0x280/0x360 [ 47.646506][ T1897] ? lock_release+0x640/0x640 [ 47.646994][ T1897] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 47.647572][ T1897] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 47.648111][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.648735][ T1897] process_one_work+0x92b/0x1460 [ 47.649262][ T1897] ? pwq_dec_nr_in_flight+0x330/0x330 [ 47.649816][ T1897] ? rwlock_bug.part.0+0x90/0x90 [ 47.650336][ T1897] worker_thread+0x95/0xe00 [ 47.650830][ T1897] ? __kthread_parkme+0x115/0x1e0 [ 47.651361][ T1897] ? process_one_work+0x1460/0x1460 [ 47.651904][ T1897] kthread+0x3a1/0x480 [ 47.652329][ T1897] ? set_kthread_struct+0x120/0x120 [ 47.652878][ T1897] ret_from_fork+0x1f/0x30 [ 47.653370][ T1897] [ 47.653608][ T1897] [ 47.653848][ T1897] addr ffffc90001f6f000 is located in stack of task kworker/0:2/1897 at offset 512 in frame: [ 47.654891][ T1897] brcmf_c_preinit_dcmds+0x0/0xc40 [ 47.655442][ T1897] [ 47.655690][ T1897] this frame has 4 objects: [ 47.656151][ T1897] [48, 56) 'ptr' [ 47.656159][ T1897] [80, 148) 'revinfo' [ 47.656534][ T1897] [192, 210) 'eventmask' [ 47.656953][ T1897] [256, 512) 'buf' [ 47.657410][ T1897] [ 47.658035][ T1897] Memory state around the buggy address: [ 47.658743][ T1897] ffffc90001f6ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.659577][ T1897] ffffc90001f6ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.660394][ T1897] >ffffc90001f6f000: f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 [ 47.661199][ T1897] ^ [ 47.661625][ T1897] ffffc90001f6f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.662455][ T1897] ffffc90001f6f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 [ 47.663318][ T1897] ================================================================== [ 47.664147][ T1897] Disabling lock debugging due to kernel taint Reported-by: Dokyung Song <dokyungs(a)yonsei.ac.kr> Reported-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Reported-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Signed-off-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Signed-off-by: Kalle Valo <kvalo(a)kernel.org> Link: https://lore.kernel.org/r/20221115043458.37562-1-jisoo.jang@yonsei.ac.kr Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c index 8510d207ee87d..b4e8957840020 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c @@ -273,6 +273,7 @@ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) err); goto done; } + buf[sizeof(buf) - 1] = '\0'; ptr = (char *)buf; strsep(&ptr, "\n"); -- 2.39.0

2 years, 4 months

1
12
0 0

[PATCH AUTOSEL 5.4 01/19] wifi: brcmfmac: Fix potential stack-out-of-bounds in brcmf_c_preinit_dcmds()

by Sasha Levin

From: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> [ Upstream commit 0a06cadcc2a0044e4a117cc0e61436fc3a0dad69 ] This patch fixes a stack-out-of-bounds read in brcmfmac that occurs when 'buf' that is not null-terminated is passed as an argument of strsep() in brcmf_c_preinit_dcmds(). This buffer is filled with a firmware version string by memcpy() in brcmf_fil_iovar_data_get(). The patch ensures buf is null-terminated. Found by a modified version of syzkaller. [ 47.569679][ T1897] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43236b for chip BCM43236/3 [ 47.582839][ T1897] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available [ 47.601565][ T1897] ================================================================== [ 47.602574][ T1897] BUG: KASAN: stack-out-of-bounds in strsep+0x1b2/0x1f0 [ 47.603447][ T1897] Read of size 1 at addr ffffc90001f6f000 by task kworker/0:2/1897 [ 47.604336][ T1897] [ 47.604621][ T1897] CPU: 0 PID: 1897 Comm: kworker/0:2 Tainted: G O 5.14.0+ #131 [ 47.605617][ T1897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 47.606907][ T1897] Workqueue: usb_hub_wq hub_event [ 47.607453][ T1897] Call Trace: [ 47.607801][ T1897] dump_stack_lvl+0x8e/0xd1 [ 47.608295][ T1897] print_address_description.constprop.0.cold+0xf/0x334 [ 47.609009][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609434][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609863][ T1897] kasan_report.cold+0x83/0xdf [ 47.610366][ T1897] ? strsep+0x1b2/0x1f0 [ 47.610882][ T1897] strsep+0x1b2/0x1f0 [ 47.611300][ T1897] ? brcmf_fil_iovar_data_get+0x3a/0xf0 [ 47.611883][ T1897] brcmf_c_preinit_dcmds+0x995/0xc40 [ 47.612434][ T1897] ? brcmf_c_set_joinpref_default+0x100/0x100 [ 47.613078][ T1897] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 47.613662][ T1897] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 47.614208][ T1897] ? lock_acquire+0x19d/0x4e0 [ 47.614704][ T1897] ? find_held_lock+0x2d/0x110 [ 47.615236][ T1897] ? brcmf_usb_deq+0x1a7/0x260 [ 47.615741][ T1897] ? brcmf_usb_rx_fill_all+0x5a/0xf0 [ 47.616288][ T1897] brcmf_attach+0x246/0xd40 [ 47.616758][ T1897] ? wiphy_new_nm+0x1703/0x1dd0 [ 47.617280][ T1897] ? kmemdup+0x43/0x50 [ 47.617720][ T1897] brcmf_usb_probe+0x12de/0x1690 [ 47.618244][ T1897] ? brcmf_usbdev_qinit.constprop.0+0x470/0x470 [ 47.618901][ T1897] usb_probe_interface+0x2aa/0x760 [ 47.619429][ T1897] ? usb_probe_device+0x250/0x250 [ 47.619950][ T1897] really_probe+0x205/0xb70 [ 47.620435][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.621048][ T1897] __driver_probe_device+0x311/0x4b0 [ 47.621595][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.622209][ T1897] driver_probe_device+0x4e/0x150 [ 47.622739][ T1897] __device_attach_driver+0x1cc/0x2a0 [ 47.623287][ T1897] bus_for_each_drv+0x156/0x1d0 [ 47.623796][ T1897] ? bus_rescan_devices+0x30/0x30 [ 47.624309][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.624907][ T1897] ? trace_hardirqs_on+0x46/0x160 [ 47.625437][ T1897] __device_attach+0x23f/0x3a0 [ 47.625924][ T1897] ? device_bind_driver+0xd0/0xd0 [ 47.626433][ T1897] ? kobject_uevent_env+0x287/0x14b0 [ 47.627057][ T1897] bus_probe_device+0x1da/0x290 [ 47.627557][ T1897] device_add+0xb7b/0x1eb0 [ 47.628027][ T1897] ? wait_for_completion+0x290/0x290 [ 47.628593][ T1897] ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0 [ 47.629249][ T1897] usb_set_configuration+0xf59/0x16f0 [ 47.629829][ T1897] usb_generic_driver_probe+0x82/0xa0 [ 47.630385][ T1897] usb_probe_device+0xbb/0x250 [ 47.630927][ T1897] ? usb_suspend+0x590/0x590 [ 47.631397][ T1897] really_probe+0x205/0xb70 [ 47.631855][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.632469][ T1897] __driver_probe_device+0x311/0x4b0 [ 47.633002][ T1897] ? usb_generic_driver_match+0x75/0x90 [ 47.633573][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.634170][ T1897] driver_probe_device+0x4e/0x150 [ 47.634703][ T1897] __device_attach_driver+0x1cc/0x2a0 [ 47.635248][ T1897] bus_for_each_drv+0x156/0x1d0 [ 47.635748][ T1897] ? bus_rescan_devices+0x30/0x30 [ 47.636271][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.636881][ T1897] ? trace_hardirqs_on+0x46/0x160 [ 47.637396][ T1897] __device_attach+0x23f/0x3a0 [ 47.637904][ T1897] ? device_bind_driver+0xd0/0xd0 [ 47.638426][ T1897] ? kobject_uevent_env+0x287/0x14b0 [ 47.638985][ T1897] bus_probe_device+0x1da/0x290 [ 47.639512][ T1897] device_add+0xb7b/0x1eb0 [ 47.639977][ T1897] ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0 [ 47.640612][ T1897] ? kfree+0x14a/0x6b0 [ 47.641055][ T1897] ? __usb_get_extra_descriptor+0x116/0x160 [ 47.641679][ T1897] usb_new_device.cold+0x49c/0x1029 [ 47.642245][ T1897] ? hub_disconnect+0x450/0x450 [ 47.642756][ T1897] ? rwlock_bug.part.0+0x90/0x90 [ 47.643273][ T1897] ? _raw_spin_unlock_irq+0x24/0x30 [ 47.643822][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.644445][ T1897] hub_event+0x1c98/0x3950 [ 47.644939][ T1897] ? hub_port_debounce+0x2e0/0x2e0 [ 47.645467][ T1897] ? check_irq_usage+0x861/0xf20 [ 47.645975][ T1897] ? drain_workqueue+0x280/0x360 [ 47.646506][ T1897] ? lock_release+0x640/0x640 [ 47.646994][ T1897] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 47.647572][ T1897] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 47.648111][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.648735][ T1897] process_one_work+0x92b/0x1460 [ 47.649262][ T1897] ? pwq_dec_nr_in_flight+0x330/0x330 [ 47.649816][ T1897] ? rwlock_bug.part.0+0x90/0x90 [ 47.650336][ T1897] worker_thread+0x95/0xe00 [ 47.650830][ T1897] ? __kthread_parkme+0x115/0x1e0 [ 47.651361][ T1897] ? process_one_work+0x1460/0x1460 [ 47.651904][ T1897] kthread+0x3a1/0x480 [ 47.652329][ T1897] ? set_kthread_struct+0x120/0x120 [ 47.652878][ T1897] ret_from_fork+0x1f/0x30 [ 47.653370][ T1897] [ 47.653608][ T1897] [ 47.653848][ T1897] addr ffffc90001f6f000 is located in stack of task kworker/0:2/1897 at offset 512 in frame: [ 47.654891][ T1897] brcmf_c_preinit_dcmds+0x0/0xc40 [ 47.655442][ T1897] [ 47.655690][ T1897] this frame has 4 objects: [ 47.656151][ T1897] [48, 56) 'ptr' [ 47.656159][ T1897] [80, 148) 'revinfo' [ 47.656534][ T1897] [192, 210) 'eventmask' [ 47.656953][ T1897] [256, 512) 'buf' [ 47.657410][ T1897] [ 47.658035][ T1897] Memory state around the buggy address: [ 47.658743][ T1897] ffffc90001f6ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.659577][ T1897] ffffc90001f6ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.660394][ T1897] >ffffc90001f6f000: f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 [ 47.661199][ T1897] ^ [ 47.661625][ T1897] ffffc90001f6f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.662455][ T1897] ffffc90001f6f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 [ 47.663318][ T1897] ================================================================== [ 47.664147][ T1897] Disabling lock debugging due to kernel taint Reported-by: Dokyung Song <dokyungs(a)yonsei.ac.kr> Reported-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Reported-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Signed-off-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Signed-off-by: Kalle Valo <kvalo(a)kernel.org> Link: https://lore.kernel.org/r/20221115043458.37562-1-jisoo.jang@yonsei.ac.kr Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c index dec25e4156199..0c967b45f76f7 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c @@ -264,6 +264,7 @@ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) err); goto done; } + buf[sizeof(buf) - 1] = '\0'; ptr = (char *)buf; strsep(&ptr, "\n"); -- 2.39.0

2 years, 4 months

1
18
0 0

[PATCH AUTOSEL 5.10 01/27] wifi: ath9k: Fix use-after-free in ath9k_hif_usb_disconnect()

by Sasha Levin

From: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> [ Upstream commit f099c5c9e2ba08a379bd354a82e05ef839ae29ac ] This patch fixes a use-after-free in ath9k that occurs in ath9k_hif_usb_disconnect() when ath9k_destroy_wmi() is trying to access 'drv_priv' that has already been freed by ieee80211_free_hw(), called by ath9k_htc_hw_deinit(). The patch moves ath9k_destroy_wmi() before ieee80211_free_hw(). Note that urbs from the driver should be killed before freeing 'wmi' with ath9k_destroy_wmi() as their callbacks will access 'wmi'. Found by a modified version of syzkaller. ================================================================== BUG: KASAN: use-after-free in ath9k_destroy_wmi+0x38/0x40 Read of size 8 at addr ffff8881069132a0 by task kworker/0:1/7 CPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G O 5.14.0+ #131 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 Workqueue: usb_hub_wq hub_event Call Trace: dump_stack_lvl+0x8e/0xd1 print_address_description.constprop.0.cold+0x93/0x334 ? ath9k_destroy_wmi+0x38/0x40 ? ath9k_destroy_wmi+0x38/0x40 kasan_report.cold+0x83/0xdf ? ath9k_destroy_wmi+0x38/0x40 ath9k_destroy_wmi+0x38/0x40 ath9k_hif_usb_disconnect+0x329/0x3f0 ? ath9k_hif_usb_suspend+0x120/0x120 ? usb_disable_interface+0xfc/0x180 usb_unbind_interface+0x19b/0x7e0 ? usb_autoresume_device+0x50/0x50 device_release_driver_internal+0x44d/0x520 bus_remove_device+0x2e5/0x5a0 device_del+0x5b2/0xe30 ? __device_link_del+0x370/0x370 ? usb_remove_ep_devs+0x43/0x80 ? remove_intf_ep_devs+0x112/0x1a0 usb_disable_device+0x1e3/0x5a0 usb_disconnect+0x267/0x870 hub_event+0x168d/0x3950 ? rcu_read_lock_sched_held+0xa1/0xd0 ? hub_port_debounce+0x2e0/0x2e0 ? check_irq_usage+0x860/0xf20 ? drain_workqueue+0x281/0x360 ? lock_release+0x640/0x640 ? rcu_read_lock_sched_held+0xa1/0xd0 ? rcu_read_lock_bh_held+0xb0/0xb0 ? lockdep_hardirqs_on_prepare+0x273/0x3e0 process_one_work+0x92b/0x1460 ? pwq_dec_nr_in_flight+0x330/0x330 ? rwlock_bug.part.0+0x90/0x90 worker_thread+0x95/0xe00 ? __kthread_parkme+0x115/0x1e0 ? process_one_work+0x1460/0x1460 kthread+0x3a1/0x480 ? set_kthread_struct+0x120/0x120 ret_from_fork+0x1f/0x30 The buggy address belongs to the page: page:ffffea00041a44c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106913 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 3, migratetype Unmovable, gfp_mask 0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), pid 7, ts 38347963444, free_ts 41399957635 prep_new_page+0x1aa/0x240 get_page_from_freelist+0x159a/0x27c0 __alloc_pages+0x2da/0x6a0 alloc_pages+0xec/0x1e0 kmalloc_order+0x39/0xf0 kmalloc_order_trace+0x19/0x120 __kmalloc+0x308/0x390 wiphy_new_nm+0x6f5/0x1dd0 ieee80211_alloc_hw_nm+0x36d/0x2230 ath9k_htc_probe_device+0x9d/0x1e10 ath9k_htc_hw_init+0x34/0x50 ath9k_hif_usb_firmware_cb+0x25f/0x4e0 request_firmware_work_func+0x131/0x240 process_one_work+0x92b/0x1460 worker_thread+0x95/0xe00 kthread+0x3a1/0x480 page last free stack trace: free_pcp_prepare+0x3d3/0x7f0 free_unref_page+0x1e/0x3d0 device_release+0xa4/0x240 kobject_put+0x186/0x4c0 put_device+0x20/0x30 ath9k_htc_disconnect_device+0x1cf/0x2c0 ath9k_htc_hw_deinit+0x26/0x30 ath9k_hif_usb_disconnect+0x2d9/0x3f0 usb_unbind_interface+0x19b/0x7e0 device_release_driver_internal+0x44d/0x520 bus_remove_device+0x2e5/0x5a0 device_del+0x5b2/0xe30 usb_disable_device+0x1e3/0x5a0 usb_disconnect+0x267/0x870 hub_event+0x168d/0x3950 process_one_work+0x92b/0x1460 Memory state around the buggy address: ffff888106913180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888106913200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888106913280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888106913300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888106913380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Reported-by: Dokyung Song <dokyungs(a)yonsei.ac.kr> Reported-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Reported-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Signed-off-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Acked-by: Toke Høiland-Jørgensen <toke(a)toke.dk> Signed-off-by: Kalle Valo <quic_kvalo(a)quicinc.com> Link: https://lore.kernel.org/r/20221205014308.1617597-1-linuxlovemin@yonsei.ac.kr Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/wireless/ath/ath9k/hif_usb.c | 2 -- drivers/net/wireless/ath/ath9k/htc_drv_init.c | 2 ++ 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index f938ac1a4abd4..4d63f0021713f 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -1412,8 +1412,6 @@ static void ath9k_hif_usb_disconnect(struct usb_interface *interface) if (hif_dev->flags & HIF_USB_READY) { ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); - ath9k_hif_usb_dev_deinit(hif_dev); - ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv); ath9k_htc_hw_free(hif_dev->htc_handle); } diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c index 07ac88fb1c577..96a3185a96d75 100644 --- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c +++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c @@ -988,6 +988,8 @@ void ath9k_htc_disconnect_device(struct htc_target *htc_handle, bool hotunplug) ath9k_deinit_device(htc_handle->drv_priv); ath9k_stop_wmi(htc_handle->drv_priv); + ath9k_hif_usb_dealloc_urbs((struct hif_device_usb *)htc_handle->hif_dev); + ath9k_destroy_wmi(htc_handle->drv_priv); ieee80211_free_hw(htc_handle->drv_priv->hw); } } -- 2.39.0

2 years, 4 months

1
26
0 0

[PATCH AUTOSEL 5.15 01/36] wifi: ath9k: Fix use-after-free in ath9k_hif_usb_disconnect()

by Sasha Levin

From: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> [ Upstream commit f099c5c9e2ba08a379bd354a82e05ef839ae29ac ] This patch fixes a use-after-free in ath9k that occurs in ath9k_hif_usb_disconnect() when ath9k_destroy_wmi() is trying to access 'drv_priv' that has already been freed by ieee80211_free_hw(), called by ath9k_htc_hw_deinit(). The patch moves ath9k_destroy_wmi() before ieee80211_free_hw(). Note that urbs from the driver should be killed before freeing 'wmi' with ath9k_destroy_wmi() as their callbacks will access 'wmi'. Found by a modified version of syzkaller. ================================================================== BUG: KASAN: use-after-free in ath9k_destroy_wmi+0x38/0x40 Read of size 8 at addr ffff8881069132a0 by task kworker/0:1/7 CPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G O 5.14.0+ #131 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 Workqueue: usb_hub_wq hub_event Call Trace: dump_stack_lvl+0x8e/0xd1 print_address_description.constprop.0.cold+0x93/0x334 ? ath9k_destroy_wmi+0x38/0x40 ? ath9k_destroy_wmi+0x38/0x40 kasan_report.cold+0x83/0xdf ? ath9k_destroy_wmi+0x38/0x40 ath9k_destroy_wmi+0x38/0x40 ath9k_hif_usb_disconnect+0x329/0x3f0 ? ath9k_hif_usb_suspend+0x120/0x120 ? usb_disable_interface+0xfc/0x180 usb_unbind_interface+0x19b/0x7e0 ? usb_autoresume_device+0x50/0x50 device_release_driver_internal+0x44d/0x520 bus_remove_device+0x2e5/0x5a0 device_del+0x5b2/0xe30 ? __device_link_del+0x370/0x370 ? usb_remove_ep_devs+0x43/0x80 ? remove_intf_ep_devs+0x112/0x1a0 usb_disable_device+0x1e3/0x5a0 usb_disconnect+0x267/0x870 hub_event+0x168d/0x3950 ? rcu_read_lock_sched_held+0xa1/0xd0 ? hub_port_debounce+0x2e0/0x2e0 ? check_irq_usage+0x860/0xf20 ? drain_workqueue+0x281/0x360 ? lock_release+0x640/0x640 ? rcu_read_lock_sched_held+0xa1/0xd0 ? rcu_read_lock_bh_held+0xb0/0xb0 ? lockdep_hardirqs_on_prepare+0x273/0x3e0 process_one_work+0x92b/0x1460 ? pwq_dec_nr_in_flight+0x330/0x330 ? rwlock_bug.part.0+0x90/0x90 worker_thread+0x95/0xe00 ? __kthread_parkme+0x115/0x1e0 ? process_one_work+0x1460/0x1460 kthread+0x3a1/0x480 ? set_kthread_struct+0x120/0x120 ret_from_fork+0x1f/0x30 The buggy address belongs to the page: page:ffffea00041a44c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106913 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 3, migratetype Unmovable, gfp_mask 0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), pid 7, ts 38347963444, free_ts 41399957635 prep_new_page+0x1aa/0x240 get_page_from_freelist+0x159a/0x27c0 __alloc_pages+0x2da/0x6a0 alloc_pages+0xec/0x1e0 kmalloc_order+0x39/0xf0 kmalloc_order_trace+0x19/0x120 __kmalloc+0x308/0x390 wiphy_new_nm+0x6f5/0x1dd0 ieee80211_alloc_hw_nm+0x36d/0x2230 ath9k_htc_probe_device+0x9d/0x1e10 ath9k_htc_hw_init+0x34/0x50 ath9k_hif_usb_firmware_cb+0x25f/0x4e0 request_firmware_work_func+0x131/0x240 process_one_work+0x92b/0x1460 worker_thread+0x95/0xe00 kthread+0x3a1/0x480 page last free stack trace: free_pcp_prepare+0x3d3/0x7f0 free_unref_page+0x1e/0x3d0 device_release+0xa4/0x240 kobject_put+0x186/0x4c0 put_device+0x20/0x30 ath9k_htc_disconnect_device+0x1cf/0x2c0 ath9k_htc_hw_deinit+0x26/0x30 ath9k_hif_usb_disconnect+0x2d9/0x3f0 usb_unbind_interface+0x19b/0x7e0 device_release_driver_internal+0x44d/0x520 bus_remove_device+0x2e5/0x5a0 device_del+0x5b2/0xe30 usb_disable_device+0x1e3/0x5a0 usb_disconnect+0x267/0x870 hub_event+0x168d/0x3950 process_one_work+0x92b/0x1460 Memory state around the buggy address: ffff888106913180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888106913200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888106913280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888106913300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888106913380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Reported-by: Dokyung Song <dokyungs(a)yonsei.ac.kr> Reported-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Reported-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Signed-off-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Acked-by: Toke Høiland-Jørgensen <toke(a)toke.dk> Signed-off-by: Kalle Valo <quic_kvalo(a)quicinc.com> Link: https://lore.kernel.org/r/20221205014308.1617597-1-linuxlovemin@yonsei.ac.kr Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/wireless/ath/ath9k/hif_usb.c | 2 -- drivers/net/wireless/ath/ath9k/htc_drv_init.c | 2 ++ 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index f938ac1a4abd4..4d63f0021713f 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -1412,8 +1412,6 @@ static void ath9k_hif_usb_disconnect(struct usb_interface *interface) if (hif_dev->flags & HIF_USB_READY) { ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); - ath9k_hif_usb_dev_deinit(hif_dev); - ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv); ath9k_htc_hw_free(hif_dev->htc_handle); } diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c index 07ac88fb1c577..96a3185a96d75 100644 --- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c +++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c @@ -988,6 +988,8 @@ void ath9k_htc_disconnect_device(struct htc_target *htc_handle, bool hotunplug) ath9k_deinit_device(htc_handle->drv_priv); ath9k_stop_wmi(htc_handle->drv_priv); + ath9k_hif_usb_dealloc_urbs((struct hif_device_usb *)htc_handle->hif_dev); + ath9k_destroy_wmi(htc_handle->drv_priv); ieee80211_free_hw(htc_handle->drv_priv->hw); } } -- 2.39.0

2 years, 4 months

1
35
0 0

[PATCH AUTOSEL 6.1 01/49] wifi: ath9k: Fix use-after-free in ath9k_hif_usb_disconnect()

by Sasha Levin

From: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> [ Upstream commit f099c5c9e2ba08a379bd354a82e05ef839ae29ac ] This patch fixes a use-after-free in ath9k that occurs in ath9k_hif_usb_disconnect() when ath9k_destroy_wmi() is trying to access 'drv_priv' that has already been freed by ieee80211_free_hw(), called by ath9k_htc_hw_deinit(). The patch moves ath9k_destroy_wmi() before ieee80211_free_hw(). Note that urbs from the driver should be killed before freeing 'wmi' with ath9k_destroy_wmi() as their callbacks will access 'wmi'. Found by a modified version of syzkaller. ================================================================== BUG: KASAN: use-after-free in ath9k_destroy_wmi+0x38/0x40 Read of size 8 at addr ffff8881069132a0 by task kworker/0:1/7 CPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G O 5.14.0+ #131 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 Workqueue: usb_hub_wq hub_event Call Trace: dump_stack_lvl+0x8e/0xd1 print_address_description.constprop.0.cold+0x93/0x334 ? ath9k_destroy_wmi+0x38/0x40 ? ath9k_destroy_wmi+0x38/0x40 kasan_report.cold+0x83/0xdf ? ath9k_destroy_wmi+0x38/0x40 ath9k_destroy_wmi+0x38/0x40 ath9k_hif_usb_disconnect+0x329/0x3f0 ? ath9k_hif_usb_suspend+0x120/0x120 ? usb_disable_interface+0xfc/0x180 usb_unbind_interface+0x19b/0x7e0 ? usb_autoresume_device+0x50/0x50 device_release_driver_internal+0x44d/0x520 bus_remove_device+0x2e5/0x5a0 device_del+0x5b2/0xe30 ? __device_link_del+0x370/0x370 ? usb_remove_ep_devs+0x43/0x80 ? remove_intf_ep_devs+0x112/0x1a0 usb_disable_device+0x1e3/0x5a0 usb_disconnect+0x267/0x870 hub_event+0x168d/0x3950 ? rcu_read_lock_sched_held+0xa1/0xd0 ? hub_port_debounce+0x2e0/0x2e0 ? check_irq_usage+0x860/0xf20 ? drain_workqueue+0x281/0x360 ? lock_release+0x640/0x640 ? rcu_read_lock_sched_held+0xa1/0xd0 ? rcu_read_lock_bh_held+0xb0/0xb0 ? lockdep_hardirqs_on_prepare+0x273/0x3e0 process_one_work+0x92b/0x1460 ? pwq_dec_nr_in_flight+0x330/0x330 ? rwlock_bug.part.0+0x90/0x90 worker_thread+0x95/0xe00 ? __kthread_parkme+0x115/0x1e0 ? process_one_work+0x1460/0x1460 kthread+0x3a1/0x480 ? set_kthread_struct+0x120/0x120 ret_from_fork+0x1f/0x30 The buggy address belongs to the page: page:ffffea00041a44c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106913 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 3, migratetype Unmovable, gfp_mask 0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), pid 7, ts 38347963444, free_ts 41399957635 prep_new_page+0x1aa/0x240 get_page_from_freelist+0x159a/0x27c0 __alloc_pages+0x2da/0x6a0 alloc_pages+0xec/0x1e0 kmalloc_order+0x39/0xf0 kmalloc_order_trace+0x19/0x120 __kmalloc+0x308/0x390 wiphy_new_nm+0x6f5/0x1dd0 ieee80211_alloc_hw_nm+0x36d/0x2230 ath9k_htc_probe_device+0x9d/0x1e10 ath9k_htc_hw_init+0x34/0x50 ath9k_hif_usb_firmware_cb+0x25f/0x4e0 request_firmware_work_func+0x131/0x240 process_one_work+0x92b/0x1460 worker_thread+0x95/0xe00 kthread+0x3a1/0x480 page last free stack trace: free_pcp_prepare+0x3d3/0x7f0 free_unref_page+0x1e/0x3d0 device_release+0xa4/0x240 kobject_put+0x186/0x4c0 put_device+0x20/0x30 ath9k_htc_disconnect_device+0x1cf/0x2c0 ath9k_htc_hw_deinit+0x26/0x30 ath9k_hif_usb_disconnect+0x2d9/0x3f0 usb_unbind_interface+0x19b/0x7e0 device_release_driver_internal+0x44d/0x520 bus_remove_device+0x2e5/0x5a0 device_del+0x5b2/0xe30 usb_disable_device+0x1e3/0x5a0 usb_disconnect+0x267/0x870 hub_event+0x168d/0x3950 process_one_work+0x92b/0x1460 Memory state around the buggy address: ffff888106913180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888106913200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888106913280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888106913300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888106913380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Reported-by: Dokyung Song <dokyungs(a)yonsei.ac.kr> Reported-by: Jisoo Jang <jisoo.jang(a)yonsei.ac.kr> Reported-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Signed-off-by: Minsuk Kang <linuxlovemin(a)yonsei.ac.kr> Acked-by: Toke Høiland-Jørgensen <toke(a)toke.dk> Signed-off-by: Kalle Valo <quic_kvalo(a)quicinc.com> Link: https://lore.kernel.org/r/20221205014308.1617597-1-linuxlovemin@yonsei.ac.kr Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/wireless/ath/ath9k/hif_usb.c | 2 -- drivers/net/wireless/ath/ath9k/htc_drv_init.c | 2 ++ 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index 1a2e0c7eeb023..86ede591dafaf 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -1411,8 +1411,6 @@ static void ath9k_hif_usb_disconnect(struct usb_interface *interface) if (hif_dev->flags & HIF_USB_READY) { ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); - ath9k_hif_usb_dev_deinit(hif_dev); - ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv); ath9k_htc_hw_free(hif_dev->htc_handle); } diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c index 07ac88fb1c577..96a3185a96d75 100644 --- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c +++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c @@ -988,6 +988,8 @@ void ath9k_htc_disconnect_device(struct htc_target *htc_handle, bool hotunplug) ath9k_deinit_device(htc_handle->drv_priv); ath9k_stop_wmi(htc_handle->drv_priv); + ath9k_hif_usb_dealloc_urbs((struct hif_device_usb *)htc_handle->hif_dev); + ath9k_destroy_wmi(htc_handle->drv_priv); ieee80211_free_hw(htc_handle->drv_priv->hw); } } -- 2.39.0

2 years, 4 months

1
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0 0

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