From: Oliver O'Halloran oohall@gmail.com
[ Upstream commit f6bac19cf65c5be21d14a0c9684c8f560f2096dd ]
When building with W=1 we get the following warning:
arch/powerpc/platforms/powernv/smp.c: In function ‘pnv_smp_cpu_kill_self’: arch/powerpc/platforms/powernv/smp.c:276:16: error: suggest braces around empty body in an ‘if’ statement [-Werror=empty-body] 276 | cpu, srr1); | ^ cc1: all warnings being treated as errors
The full context is this block:
if (srr1 && !generic_check_cpu_restart(cpu)) DBG("CPU%d Unexpected exit while offline srr1=%lx!\n", cpu, srr1);
When building with DEBUG undefined DBG() expands to nothing and GCC emits the warning due to the lack of braces around an empty statement.
Signed-off-by: Oliver O'Halloran oohall@gmail.com Reviewed-by: Joel Stanley joel@jms.id.au Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20200804005410.146094-2-oohall@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/platforms/powernv/smp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c index ad7b1a3dbed09..c605c78a80896 100644 --- a/arch/powerpc/platforms/powernv/smp.c +++ b/arch/powerpc/platforms/powernv/smp.c @@ -41,7 +41,7 @@ #include <asm/udbg.h> #define DBG(fmt...) udbg_printf(fmt) #else -#define DBG(fmt...) +#define DBG(fmt...) do { } while (0) #endif
static void pnv_smp_setup_cpu(int cpu)
From: Nicholas Piggin npiggin@gmail.com
[ Upstream commit bafb056ce27940c9994ea905336aa8f27b4f7275 ]
The de facto (and apparently uncommented) standard for using an mm had, thanks to this code in sparc if nothing else, been that you must have a reference on mm_users *and that reference must have been obtained with mmget()*, i.e., from a thread with a reference to mm_users that had used the mm.
The introduction of mmget_not_zero() in commit d2005e3f41d4 ("userfaultfd: don't pin the user memory in userfaultfd_file_create()") allowed mm_count holders to aoperate on user mappings asynchronously from the actual threads using the mm, but they were not to load those mappings into their TLB (i.e., walking vmas and page tables is okay, kthread_use_mm() is not).
io_uring 2b188cc1bb857 ("Add io_uring IO interface") added code which does a kthread_use_mm() from a mmget_not_zero() refcount.
The problem with this is code which previously assumed mm == current->mm and mm->mm_users == 1 implies the mm will remain single-threaded at least until this thread creates another mm_users reference, has now broken.
arch/sparc/kernel/smp_64.c:
if (atomic_read(&mm->mm_users) == 1) { cpumask_copy(mm_cpumask(mm), cpumask_of(cpu)); goto local_flush_and_out; }
vs fs/io_uring.c
if (unlikely(!(ctx->flags & IORING_SETUP_SQPOLL) || !mmget_not_zero(ctx->sqo_mm))) return -EFAULT; kthread_use_mm(ctx->sqo_mm);
mmget_not_zero() could come in right after the mm_users == 1 test, then kthread_use_mm() which sets its CPU in the mm_cpumask. That update could be lost if cpumask_copy() occurs afterward.
I propose we fix this by allowing mmget_not_zero() to be a first-class reference, and not have this obscure undocumented and unchecked restriction.
The basic fix for sparc64 is to remove its mm_cpumask clearing code. The optimisation could be effectively restored by sending IPIs to mm_cpumask members and having them remove themselves from mm_cpumask. This is more tricky so I leave it as an exercise for someone with a sparc64 SMP. powerpc has a (currently similarly broken) example.
Signed-off-by: Nicholas Piggin npiggin@gmail.com Acked-by: David S. Miller davem@davemloft.net Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20200914045219.3736466-4-npiggin@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/sparc/kernel/smp_64.c | 65 ++++++++------------------------------ 1 file changed, 14 insertions(+), 51 deletions(-)
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c index 46866b2097e81..bd27e86ce36db 100644 --- a/arch/sparc/kernel/smp_64.c +++ b/arch/sparc/kernel/smp_64.c @@ -1030,38 +1030,9 @@ void smp_fetch_global_pmu(void) * are flush_tlb_*() routines, and these run after flush_cache_*() * which performs the flushw. * - * The SMP TLB coherency scheme we use works as follows: - * - * 1) mm->cpu_vm_mask is a bit mask of which cpus an address - * space has (potentially) executed on, this is the heuristic - * we use to avoid doing cross calls. - * - * Also, for flushing from kswapd and also for clones, we - * use cpu_vm_mask as the list of cpus to make run the TLB. - * - * 2) TLB context numbers are shared globally across all processors - * in the system, this allows us to play several games to avoid - * cross calls. - * - * One invariant is that when a cpu switches to a process, and - * that processes tsk->active_mm->cpu_vm_mask does not have the - * current cpu's bit set, that tlb context is flushed locally. - * - * If the address space is non-shared (ie. mm->count == 1) we avoid - * cross calls when we want to flush the currently running process's - * tlb state. This is done by clearing all cpu bits except the current - * processor's in current->mm->cpu_vm_mask and performing the - * flush locally only. This will force any subsequent cpus which run - * this task to flush the context from the local tlb if the process - * migrates to another cpu (again). - * - * 3) For shared address spaces (threads) and swapping we bite the - * bullet for most cases and perform the cross call (but only to - * the cpus listed in cpu_vm_mask). - * - * The performance gain from "optimizing" away the cross call for threads is - * questionable (in theory the big win for threads is the massive sharing of - * address space state across processors). + * mm->cpu_vm_mask is a bit mask of which cpus an address + * space has (potentially) executed on, this is the heuristic + * we use to limit cross calls. */
/* This currently is only used by the hugetlb arch pre-fault @@ -1071,18 +1042,13 @@ void smp_fetch_global_pmu(void) void smp_flush_tlb_mm(struct mm_struct *mm) { u32 ctx = CTX_HWBITS(mm->context); - int cpu = get_cpu();
- if (atomic_read(&mm->mm_users) == 1) { - cpumask_copy(mm_cpumask(mm), cpumask_of(cpu)); - goto local_flush_and_out; - } + get_cpu();
smp_cross_call_masked(&xcall_flush_tlb_mm, ctx, 0, 0, mm_cpumask(mm));
-local_flush_and_out: __flush_tlb_mm(ctx, SECONDARY_CONTEXT);
put_cpu(); @@ -1105,17 +1071,15 @@ void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long { u32 ctx = CTX_HWBITS(mm->context); struct tlb_pending_info info; - int cpu = get_cpu(); + + get_cpu();
info.ctx = ctx; info.nr = nr; info.vaddrs = vaddrs;
- if (mm == current->mm && atomic_read(&mm->mm_users) == 1) - cpumask_copy(mm_cpumask(mm), cpumask_of(cpu)); - else - smp_call_function_many(mm_cpumask(mm), tlb_pending_func, - &info, 1); + smp_call_function_many(mm_cpumask(mm), tlb_pending_func, + &info, 1);
__flush_tlb_pending(ctx, nr, vaddrs);
@@ -1125,14 +1089,13 @@ void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long void smp_flush_tlb_page(struct mm_struct *mm, unsigned long vaddr) { unsigned long context = CTX_HWBITS(mm->context); - int cpu = get_cpu();
- if (mm == current->mm && atomic_read(&mm->mm_users) == 1) - cpumask_copy(mm_cpumask(mm), cpumask_of(cpu)); - else - smp_cross_call_masked(&xcall_flush_tlb_page, - context, vaddr, 0, - mm_cpumask(mm)); + get_cpu(); + + smp_cross_call_masked(&xcall_flush_tlb_page, + context, vaddr, 0, + mm_cpumask(mm)); + __flush_tlb_page(context, vaddr);
put_cpu();
From: Chao Yu yuchao0@huawei.com
[ Upstream commit 6a257471fa42c8c9c04a875cd3a2a22db148e0f0 ]
As syzbot reported:
kernel BUG at fs/f2fs/segment.h:657! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 16220 Comm: syz-executor.0 Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:f2fs_ra_meta_pages+0xa51/0xdc0 fs/f2fs/segment.h:657 Call Trace: build_sit_entries fs/f2fs/segment.c:4195 [inline] f2fs_build_segment_manager+0x4b8a/0xa3c0 fs/f2fs/segment.c:4779 f2fs_fill_super+0x377d/0x6b80 fs/f2fs/super.c:3633 mount_bdev+0x32e/0x3f0 fs/super.c:1417 legacy_get_tree+0x105/0x220 fs/fs_context.c:592 vfs_get_tree+0x89/0x2f0 fs/super.c:1547 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x1387/0x2070 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount fs/namespace.c:3390 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3390 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9
@blkno in f2fs_ra_meta_pages could exceed max segment count, causing panic in following sanity check in current_sit_addr(), add check condition to avoid this issue.
Reported-by: syzbot+3698081bcf0bb2d12174@syzkaller.appspotmail.com Signed-off-by: Chao Yu yuchao0@huawei.com Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/checkpoint.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 4b2f609f376d3..047da0f105278 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -188,6 +188,8 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, blkno * NAT_ENTRY_PER_BLOCK); break; case META_SIT: + if (unlikely(blkno >= TOTAL_SEGS(sbi))) + goto out; /* get sit block addr */ fio.blk_addr = current_sit_addr(sbi, blkno * SIT_ENTRY_PER_BLOCK);
From: Johannes Berg johannes.berg@intel.com
[ Upstream commit f2d05059e15af3f70502074f4e3a504530af504a ]
Lockdep complains at boot:
============================= [ BUG: Invalid wait context ] 5.7.0-05093-g46d91ecd597b #98 Not tainted ----------------------------- swapper/1 is trying to lock: 0000000060931b98 (&desc[i].request_mutex){+.+.}-{3:3}, at: __setup_irq+0x11d/0x623 other info that might help us debug this: context-{4:4} 1 lock held by swapper/1: #0: 000000006074fed8 (sigio_spinlock){+.+.}-{2:2}, at: sigio_lock+0x1a/0x1c stack backtrace: CPU: 0 PID: 1 Comm: swapper Not tainted 5.7.0-05093-g46d91ecd597b #98 Stack: 7fa4fab0 6028dfd1 0000002a 6008bea5 7fa50700 7fa50040 7fa4fac0 6028e016 7fa4fb50 6007f6da 60959c18 00000000 Call Trace: [<60023a0e>] show_stack+0x13b/0x155 [<6028e016>] dump_stack+0x2a/0x2c [<6007f6da>] __lock_acquire+0x515/0x15f2 [<6007eb50>] lock_acquire+0x245/0x273 [<6050d9f1>] __mutex_lock+0xbd/0x325 [<6050dc76>] mutex_lock_nested+0x1d/0x1f [<6008e27e>] __setup_irq+0x11d/0x623 [<6008e8ed>] request_threaded_irq+0x169/0x1a6 [<60021eb0>] um_request_irq+0x1ee/0x24b [<600234ee>] write_sigio_irq+0x3b/0x76 [<600383ca>] sigio_broken+0x146/0x2e4 [<60020bd8>] do_one_initcall+0xde/0x281
Because we hold sigio_spinlock and then get into requesting an interrupt with a mutex.
Change the spinlock to a mutex to avoid that.
Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Richard Weinberger richard@nod.at Signed-off-by: Sasha Levin sashal@kernel.org --- arch/um/kernel/sigio.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/um/kernel/sigio.c b/arch/um/kernel/sigio.c index b5e0cbb343828..476ded92affac 100644 --- a/arch/um/kernel/sigio.c +++ b/arch/um/kernel/sigio.c @@ -36,14 +36,14 @@ int write_sigio_irq(int fd) }
/* These are called from os-Linux/sigio.c to protect its pollfds arrays. */ -static DEFINE_SPINLOCK(sigio_spinlock); +static DEFINE_MUTEX(sigio_mutex);
void sigio_lock(void) { - spin_lock(&sigio_spinlock); + mutex_lock(&sigio_mutex); }
void sigio_unlock(void) { - spin_unlock(&sigio_spinlock); + mutex_unlock(&sigio_mutex); }
From: "Darrick J. Wong" darrick.wong@oracle.com
[ Upstream commit f4c32e87de7d66074d5612567c5eac7325024428 ]
The realtime bitmap and summary files are regular files that are hidden away from the directory tree. Since they're regular files, inode inactivation will try to purge what it thinks are speculative preallocations beyond the incore size of the file. Unfortunately, xfs_growfs_rt forgets to update the incore size when it resizes the inodes, with the result that inactivating the rt inodes at unmount time will cause their contents to be truncated.
Fix this by updating the incore size when we change the ondisk size as part of updating the superblock. Note that we don't do this when we're allocating blocks to the rt inodes because we actually want those blocks to get purged if the growfs fails.
This fixes corruption complaints from the online rtsummary checker when running xfs/233. Since that test requires rmap, one can also trigger this by growing an rt volume, cycling the mount, and creating rt files.
Signed-off-by: Darrick J. Wong darrick.wong@oracle.com Reviewed-by: Chandan Babu R chandanrlinux@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/xfs/xfs_rtalloc.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index 919b6544b61a3..eb7a0e69dd0bd 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -1006,10 +1006,13 @@ xfs_growfs_rt( xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL); xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); /* - * Update the bitmap inode's size. + * Update the bitmap inode's size ondisk and incore. We need + * to update the incore size so that inode inactivation won't + * punch what it thinks are "posteof" blocks. */ mp->m_rbmip->i_d.di_size = nsbp->sb_rbmblocks * nsbp->sb_blocksize; + i_size_write(VFS_I(mp->m_rbmip), mp->m_rbmip->i_d.di_size); xfs_trans_log_inode(tp, mp->m_rbmip, XFS_ILOG_CORE); /* * Get the summary inode into the transaction. @@ -1017,9 +1020,12 @@ xfs_growfs_rt( xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL); xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL); /* - * Update the summary inode's size. + * Update the summary inode's size. We need to update the + * incore size so that inode inactivation won't punch what it + * thinks are "posteof" blocks. */ mp->m_rsumip->i_d.di_size = nmp->m_rsumsize; + i_size_write(VFS_I(mp->m_rsumip), mp->m_rsumip->i_d.di_size); xfs_trans_log_inode(tp, mp->m_rsumip, XFS_ILOG_CORE); /* * Copy summary data from old to new sizes.
From: Tom Rix trix@redhat.com
[ Upstream commit 8e1ba47c60bcd325fdd097cd76054639155e5d2e ]
clang static analysis reports this repesentative error
pvr2fb.c:1049:2: warning: 1st function call argument is an uninitialized value [core.CallAndMessage] if (*cable_arg) ^~~~~~~~~~~~~~~
Problem is that cable_arg depends on the input loop to set the cable_arg[0]. If it does not, then some random value from the stack is used.
A similar problem exists for output_arg.
So initialize cable_arg and output_arg.
Signed-off-by: Tom Rix trix@redhat.com Acked-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Sam Ravnborg sam@ravnborg.org Link: https://patchwork.freedesktop.org/patch/msgid/20200720191845.20115-1-trix@re... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/video/fbdev/pvr2fb.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c index 750a384bf1915..1a015a6b682e7 100644 --- a/drivers/video/fbdev/pvr2fb.c +++ b/drivers/video/fbdev/pvr2fb.c @@ -1029,6 +1029,8 @@ static int __init pvr2fb_setup(char *options) if (!options || !*options) return 0;
+ cable_arg[0] = output_arg[0] = 0; + while ((this_opt = strsep(&options, ","))) { if (!*this_opt) continue;
From: Sathishkumar Muruganandam murugana@codeaurora.org
[ Upstream commit 99f41b8e43b8b4b31262adb8ac3e69088fff1289 ]
When STBC is enabled, NSTS_SU value need to be accounted for VHT NSS calculation for SU case.
Without this fix, 1SS + STBC enabled case was reported wrongly as 2SS in radiotap header on monitor mode capture.
Tested-on: QCA9984 10.4-3.10-00047
Signed-off-by: Sathishkumar Muruganandam murugana@codeaurora.org Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/1597392971-3897-1-git-send-email-murugana@codeauro... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/ath/ath10k/htt_rx.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c index a65b5d7f59f44..47ac9aa986dcd 100644 --- a/drivers/net/wireless/ath/ath10k/htt_rx.c +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c @@ -657,6 +657,7 @@ static void ath10k_htt_rx_h_rates(struct ath10k *ar, u8 preamble = 0; u8 group_id; u32 info1, info2, info3; + u32 stbc, nsts_su;
info1 = __le32_to_cpu(rxd->ppdu_start.info1); info2 = __le32_to_cpu(rxd->ppdu_start.info2); @@ -700,11 +701,16 @@ static void ath10k_htt_rx_h_rates(struct ath10k *ar, TODO check this */ bw = info2 & 3; sgi = info3 & 1; + stbc = (info2 >> 3) & 1; group_id = (info2 >> 4) & 0x3F;
if (GROUP_ID_IS_SU_MIMO(group_id)) { mcs = (info3 >> 4) & 0x0F; - nss = ((info2 >> 10) & 0x07) + 1; + nsts_su = ((info2 >> 10) & 0x07); + if (stbc) + nss = (nsts_su >> 2) + 1; + else + nss = (nsts_su + 1); } else { /* Hardware doesn't decode VHT-SIG-B into Rx descriptor * so it's impossible to decode MCS. Also since
From: Madhuparna Bhowmik madhuparnabhowmik10@gmail.com
[ Upstream commit 87d7ad089b318b4f319bf57f1daa64eb6d1d10ad ]
via_save_pcictrlreg() should be called with host->lock held as it writes to pm_pcictrl_reg, otherwise there can be a race condition between via_sd_suspend() and via_sdc_card_detect(). The same pattern is used in the function via_reset_pcictrl() as well, where via_save_pcictrlreg() is called with host->lock held.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Madhuparna Bhowmik madhuparnabhowmik10@gmail.com Link: https://lore.kernel.org/r/20200822061528.7035-1-madhuparnabhowmik10@gmail.co... Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mmc/host/via-sdmmc.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c index 63fac78b3d46a..b455e9cf95afc 100644 --- a/drivers/mmc/host/via-sdmmc.c +++ b/drivers/mmc/host/via-sdmmc.c @@ -1269,11 +1269,14 @@ static void via_init_sdc_pm(struct via_crdr_mmc_host *host) static int via_sd_suspend(struct pci_dev *pcidev, pm_message_t state) { struct via_crdr_mmc_host *host; + unsigned long flags;
host = pci_get_drvdata(pcidev);
+ spin_lock_irqsave(&host->lock, flags); via_save_pcictrlreg(host); via_save_sdcreg(host); + spin_unlock_irqrestore(&host->lock, flags);
pci_save_state(pcidev); pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
From: John Ogness john.ogness@linutronix.de
[ Upstream commit 550c10d28d21bd82a8bb48debbb27e6ed53262f6 ]
The .bss section for the h8300 is relatively small. A value of CONFIG_LOG_BUF_SHIFT that is larger than 19 will create a static printk ringbuffer that is too large. Limit the range appropriately for the H8300.
Reported-by: kernel test robot lkp@intel.com Signed-off-by: John Ogness john.ogness@linutronix.de Reviewed-by: Sergey Senozhatsky sergey.senozhatsky@gmail.com Acked-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Petr Mladek pmladek@suse.com Link: https://lore.kernel.org/r/20200812073122.25412-1-john.ogness@linutronix.de Signed-off-by: Sasha Levin sashal@kernel.org --- init/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/init/Kconfig b/init/Kconfig index f9fb621c95623..5d8ada360ca34 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -823,7 +823,8 @@ config IKCONFIG_PROC
config LOG_BUF_SHIFT int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" - range 12 25 + range 12 25 if !H8300 + range 12 19 if H8300 default 17 depends on PRINTK help
From: Douglas Anderson dianders@chromium.org
[ Upstream commit b18b099e04f450cdc77bec72acefcde7042bd1f3 ]
On my system the kernel processes the "kgdb_earlycon" parameter before the "kgdbcon" parameter. When we setup "kgdb_earlycon" we'll end up in kgdb_register_callbacks() and "kgdb_use_con" won't have been set yet so we'll never get around to starting "kgdbcon". Let's remedy this by detecting that the IO module was already registered when setting "kgdb_use_con" and registering the console then.
As part of this, to avoid pre-declaring things, move the handling of the "kgdbcon" further down in the file.
Signed-off-by: Douglas Anderson dianders@chromium.org Link: https://lore.kernel.org/r/20200630151422.1.I4aa062751ff5e281f5116655c976dff5... Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/debug/debug_core.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c index 321ccdbb73649..bc791cec58e63 100644 --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -94,14 +94,6 @@ int dbg_switch_cpu; /* Use kdb or gdbserver mode */ int dbg_kdb_mode = 1;
-static int __init opt_kgdb_con(char *str) -{ - kgdb_use_con = 1; - return 0; -} - -early_param("kgdbcon", opt_kgdb_con); - module_param(kgdb_use_con, int, 0644); module_param(kgdbreboot, int, 0644);
@@ -811,6 +803,20 @@ static struct console kgdbcons = { .index = -1, };
+static int __init opt_kgdb_con(char *str) +{ + kgdb_use_con = 1; + + if (kgdb_io_module_registered && !kgdb_con_registered) { + register_console(&kgdbcons); + kgdb_con_registered = 1; + } + + return 0; +} + +early_param("kgdbcon", opt_kgdb_con); + #ifdef CONFIG_MAGIC_SYSRQ static void sysrq_handle_dbg(int key) {
From: Oliver Neukum oneukum@suse.com
[ Upstream commit c56150c1bc8da5524831b1dac2eec3c67b89f587 ]
Handling for removal of the controller was missing at one place. Add it.
Signed-off-by: Oliver Neukum oneukum@suse.com Link: https://lore.kernel.org/r/20200917112600.26508-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/misc/adutux.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c index ba5c0a4591ac9..012d97f9c30c7 100644 --- a/drivers/usb/misc/adutux.c +++ b/drivers/usb/misc/adutux.c @@ -210,6 +210,7 @@ static void adu_interrupt_out_callback(struct urb *urb)
if (status != 0) { if ((status != -ENOENT) && + (status != -ESHUTDOWN) && (status != -ECONNRESET)) { dev_dbg(&dev->udev->dev, "%s :nonzero status received: %d\n", __func__,
From: Jonathan Cameron Jonathan.Cameron@huawei.com
[ Upstream commit 8a3decac087aa897df5af04358c2089e52e70ac4 ]
The function should check the validity of the pxm value before using it to index the pxm_to_node_map[] array.
Whilst hardening this code may be good in general, the main intent here is to enable following patches that use this function to replace acpi_map_pxm_to_node() for non SRAT usecases which should return NO_NUMA_NODE for PXM entries not matching with those in SRAT.
Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Reviewed-by: Barry Song song.bao.hua@hisilicon.com Reviewed-by: Hanjun Guo guohanjun@huawei.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/numa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c index 2946e2846573b..15a506c2d20a0 100644 --- a/drivers/acpi/numa.c +++ b/drivers/acpi/numa.c @@ -46,7 +46,7 @@ unsigned char acpi_srat_revision __initdata;
int pxm_to_node(int pxm) { - if (pxm < 0) + if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off) return NUMA_NO_NODE; return pxm_to_node_map[pxm]; }
From: Mike Snitzer snitzer@redhat.com
[ Upstream commit 5091cdec56faeaefa79de4b6cb3c3c55e50d1ac3 ]
Using blk_max_size_offset() enables DM core's splitting to impose ti->max_io_len (via q->limits.chunk_sectors) and also fallback to respecting q->limits.max_sectors if chunk_sectors isn't set.
Signed-off-by: Mike Snitzer snitzer@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/dm.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index ff017d148323d..41cb281685242 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1393,22 +1393,18 @@ static sector_t max_io_len_target_boundary(sector_t sector, struct dm_target *ti static sector_t max_io_len(sector_t sector, struct dm_target *ti) { sector_t len = max_io_len_target_boundary(sector, ti); - sector_t offset, max_len; + sector_t max_len;
/* * Does the target need to split even further? + * - q->limits.chunk_sectors reflects ti->max_io_len so + * blk_max_size_offset() provides required splitting. + * - blk_max_size_offset() also respects q->limits.max_sectors */ - if (ti->max_io_len) { - offset = dm_target_offset(ti, sector); - if (unlikely(ti->max_io_len & (ti->max_io_len - 1))) - max_len = sector_div(offset, ti->max_io_len); - else - max_len = offset & (ti->max_io_len - 1); - max_len = ti->max_io_len - max_len; - - if (len > max_len) - len = max_len; - } + max_len = blk_max_size_offset(dm_table_get_md(ti->table)->queue, + dm_target_offset(ti, sector)); + if (len > max_len) + len = max_len;
return len; }
From: Xie He xie.he.0141@gmail.com
[ Upstream commit 8306266c1d51aac9aa7aa907fe99032a58c6382c ]
The fr_hard_header function is used to prepend the header to skbs before transmission. It is used in 3 situations: 1) When a control packet is generated internally in this driver; 2) When a user sends an skb on an Ethernet-emulating PVC device; 3) When a user sends an skb on a normal PVC device.
These 3 situations need to be handled differently by fr_hard_header. Different headers should be prepended to the skb in different situations.
Currently fr_hard_header distinguishes these 3 situations using skb->protocol. For situation 1 and 2, a special skb->protocol value will be assigned before calling fr_hard_header, so that it can recognize these 2 situations. All skb->protocol values other than these special ones are treated by fr_hard_header as situation 3.
However, it is possible that in situation 3, the user sends an skb with one of the special skb->protocol values. In this case, fr_hard_header would incorrectly treat it as situation 1 or 2.
This patch tries to solve this issue by using skb->dev instead of skb->protocol to distinguish between these 3 situations. For situation 1, skb->dev would be NULL; for situation 2, skb->dev->type would be ARPHRD_ETHER; and for situation 3, skb->dev->type would be ARPHRD_DLCI.
This way fr_hard_header would be able to distinguish these 3 situations correctly regardless what skb->protocol value the user tries to use in situation 3.
Cc: Krzysztof Halasa khc@pm.waw.pl Signed-off-by: Xie He xie.he.0141@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wan/hdlc_fr.c | 98 ++++++++++++++++++++------------------- 1 file changed, 51 insertions(+), 47 deletions(-)
diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c index 74d46f7e77eaa..045158fab8fe6 100644 --- a/drivers/net/wan/hdlc_fr.c +++ b/drivers/net/wan/hdlc_fr.c @@ -275,63 +275,69 @@ static inline struct net_device **get_dev_p(struct pvc_device *pvc,
static int fr_hard_header(struct sk_buff **skb_p, u16 dlci) { - u16 head_len; struct sk_buff *skb = *skb_p;
- switch (skb->protocol) { - case cpu_to_be16(NLPID_CCITT_ANSI_LMI): - head_len = 4; - skb_push(skb, head_len); - skb->data[3] = NLPID_CCITT_ANSI_LMI; - break; - - case cpu_to_be16(NLPID_CISCO_LMI): - head_len = 4; - skb_push(skb, head_len); - skb->data[3] = NLPID_CISCO_LMI; - break; - - case cpu_to_be16(ETH_P_IP): - head_len = 4; - skb_push(skb, head_len); - skb->data[3] = NLPID_IP; - break; - - case cpu_to_be16(ETH_P_IPV6): - head_len = 4; - skb_push(skb, head_len); - skb->data[3] = NLPID_IPV6; - break; - - case cpu_to_be16(ETH_P_802_3): - head_len = 10; - if (skb_headroom(skb) < head_len) { - struct sk_buff *skb2 = skb_realloc_headroom(skb, - head_len); + if (!skb->dev) { /* Control packets */ + switch (dlci) { + case LMI_CCITT_ANSI_DLCI: + skb_push(skb, 4); + skb->data[3] = NLPID_CCITT_ANSI_LMI; + break; + + case LMI_CISCO_DLCI: + skb_push(skb, 4); + skb->data[3] = NLPID_CISCO_LMI; + break; + + default: + return -EINVAL; + } + + } else if (skb->dev->type == ARPHRD_DLCI) { + switch (skb->protocol) { + case htons(ETH_P_IP): + skb_push(skb, 4); + skb->data[3] = NLPID_IP; + break; + + case htons(ETH_P_IPV6): + skb_push(skb, 4); + skb->data[3] = NLPID_IPV6; + break; + + default: + skb_push(skb, 10); + skb->data[3] = FR_PAD; + skb->data[4] = NLPID_SNAP; + /* OUI 00-00-00 indicates an Ethertype follows */ + skb->data[5] = 0x00; + skb->data[6] = 0x00; + skb->data[7] = 0x00; + /* This should be an Ethertype: */ + *(__be16 *)(skb->data + 8) = skb->protocol; + } + + } else if (skb->dev->type == ARPHRD_ETHER) { + if (skb_headroom(skb) < 10) { + struct sk_buff *skb2 = skb_realloc_headroom(skb, 10); if (!skb2) return -ENOBUFS; dev_kfree_skb(skb); skb = *skb_p = skb2; } - skb_push(skb, head_len); + skb_push(skb, 10); skb->data[3] = FR_PAD; skb->data[4] = NLPID_SNAP; - skb->data[5] = FR_PAD; + /* OUI 00-80-C2 stands for the 802.1 organization */ + skb->data[5] = 0x00; skb->data[6] = 0x80; skb->data[7] = 0xC2; + /* PID 00-07 stands for Ethernet frames without FCS */ skb->data[8] = 0x00; - skb->data[9] = 0x07; /* bridged Ethernet frame w/out FCS */ - break; + skb->data[9] = 0x07;
- default: - head_len = 10; - skb_push(skb, head_len); - skb->data[3] = FR_PAD; - skb->data[4] = NLPID_SNAP; - skb->data[5] = FR_PAD; - skb->data[6] = FR_PAD; - skb->data[7] = FR_PAD; - *(__be16*)(skb->data + 8) = skb->protocol; + } else { + return -EINVAL; }
dlci_to_q922(skb->data, dlci); @@ -427,8 +433,8 @@ static netdev_tx_t pvc_xmit(struct sk_buff *skb, struct net_device *dev) skb_put(skb, pad); memset(skb->data + len, 0, pad); } - skb->protocol = cpu_to_be16(ETH_P_802_3); } + skb->dev = dev; if (!fr_hard_header(&skb, pvc->dlci)) { dev->stats.tx_bytes += skb->len; dev->stats.tx_packets++; @@ -496,10 +502,8 @@ static void fr_lmi_send(struct net_device *dev, int fullrep) memset(skb->data, 0, len); skb_reserve(skb, 4); if (lmi == LMI_CISCO) { - skb->protocol = cpu_to_be16(NLPID_CISCO_LMI); fr_hard_header(&skb, LMI_CISCO_DLCI); } else { - skb->protocol = cpu_to_be16(NLPID_CCITT_ANSI_LMI); fr_hard_header(&skb, LMI_CCITT_ANSI_DLCI); } data = skb_tail_pointer(skb);
From: Xiongfeng Wang wangxiongfeng2@huawei.com
[ Upstream commit c07fa6c1631333f02750cf59f22b615d768b4d8f ]
When I cat some module parameters by sysfs, it displays as follows. It's better to add a newline for easy reading.
root@syzkaller:~# cd /sys/module/test_power/parameters/ root@syzkaller:/sys/module/test_power/parameters# cat ac_online onroot@syzkaller:/sys/module/test_power/parameters# cat battery_present trueroot@syzkaller:/sys/module/test_power/parameters# cat battery_health goodroot@syzkaller:/sys/module/test_power/parameters# cat battery_status dischargingroot@syzkaller:/sys/module/test_power/parameters# cat battery_technology LIONroot@syzkaller:/sys/module/test_power/parameters# cat usb_online onroot@syzkaller:/sys/module/test_power/parameters#
Signed-off-by: Xiongfeng Wang wangxiongfeng2@huawei.com Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/power/test_power.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/power/test_power.c b/drivers/power/test_power.c index 57246cdbd0426..925abec45380f 100644 --- a/drivers/power/test_power.c +++ b/drivers/power/test_power.c @@ -344,6 +344,7 @@ static int param_set_ac_online(const char *key, const struct kernel_param *kp) static int param_get_ac_online(char *buffer, const struct kernel_param *kp) { strcpy(buffer, map_get_key(map_ac_online, ac_online, "unknown")); + strcat(buffer, "\n"); return strlen(buffer); }
@@ -357,6 +358,7 @@ static int param_set_usb_online(const char *key, const struct kernel_param *kp) static int param_get_usb_online(char *buffer, const struct kernel_param *kp) { strcpy(buffer, map_get_key(map_ac_online, usb_online, "unknown")); + strcat(buffer, "\n"); return strlen(buffer); }
@@ -371,6 +373,7 @@ static int param_set_battery_status(const char *key, static int param_get_battery_status(char *buffer, const struct kernel_param *kp) { strcpy(buffer, map_get_key(map_status, battery_status, "unknown")); + strcat(buffer, "\n"); return strlen(buffer); }
@@ -385,6 +388,7 @@ static int param_set_battery_health(const char *key, static int param_get_battery_health(char *buffer, const struct kernel_param *kp) { strcpy(buffer, map_get_key(map_health, battery_health, "unknown")); + strcat(buffer, "\n"); return strlen(buffer); }
@@ -400,6 +404,7 @@ static int param_get_battery_present(char *buffer, const struct kernel_param *kp) { strcpy(buffer, map_get_key(map_present, battery_present, "unknown")); + strcat(buffer, "\n"); return strlen(buffer); }
@@ -417,6 +422,7 @@ static int param_get_battery_technology(char *buffer, { strcpy(buffer, map_get_key(map_technology, battery_technology, "unknown")); + strcat(buffer, "\n"); return strlen(buffer); }
From: Zhao Heming heming.zhao@suse.com
[ Upstream commit d837f7277f56e70d82b3a4a037d744854e62f387 ]
md_bitmap_get_counter() has code:
``` if (bitmap->bp[page].hijacked || bitmap->bp[page].map == NULL) csize = ((sector_t)1) << (bitmap->chunkshift + PAGE_COUNTER_SHIFT - 1); ```
The minus 1 is wrong, this branch should report 2048 bits of space. With "-1" action, this only report 1024 bit of space.
This bug code returns wrong blocks, but it doesn't inflence bitmap logic: 1. Most callers focus this function return value (the counter of offset), not the parameter blocks. 2. The bug is only triggered when hijacked is true or map is NULL. the hijacked true condition is very rare. the "map == null" only true when array is creating or resizing. 3. Even the caller gets wrong blocks, current code makes caller just to call md_bitmap_get_counter() one more time.
Signed-off-by: Zhao Heming heming.zhao@suse.com Signed-off-by: Song Liu songliubraving@fb.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/bitmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 391090c455cea..65281f168c6fb 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1332,7 +1332,7 @@ __acquires(bitmap->lock) if (bitmap->bp[page].hijacked || bitmap->bp[page].map == NULL) csize = ((sector_t)1) << (bitmap->chunkshift + - PAGE_COUNTER_SHIFT - 1); + PAGE_COUNTER_SHIFT); else csize = ((sector_t)1) << bitmap->chunkshift; *blocks = csize - (offset & (csize - 1));
From: Tero Kristo t-kristo@ti.com
[ Upstream commit b7a7943fe291b983b104bcbd2f16e8e896f56590 ]
Fix a memory leak induced by not calling clk_put after doing of_clk_get.
Reported-by: Dan Murphy dmurphy@ti.com Signed-off-by: Tero Kristo t-kristo@ti.com Link: https://lore.kernel.org/r/20200907082600.454-3-t-kristo@ti.com Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/ti/clockdomain.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/clk/ti/clockdomain.c b/drivers/clk/ti/clockdomain.c index b9bc3b8df659d..4fde9767392e3 100644 --- a/drivers/clk/ti/clockdomain.c +++ b/drivers/clk/ti/clockdomain.c @@ -124,10 +124,12 @@ static void __init of_ti_clockdomain_setup(struct device_node *node) if (clk_hw_get_flags(clk_hw) & CLK_IS_BASIC) { pr_warn("can't setup clkdm for basic clk %s\n", __clk_get_name(clk)); + clk_put(clk); continue; } to_clk_hw_omap(clk_hw)->clkdm_name = clkdm_name; omap2_init_clk_clkdm(clk_hw); + clk_put(clk); } }
From: Anant Thazhemadam anant.thazhemadam@gmail.com
[ Upstream commit 7ca1db21ef8e0e6725b4d25deed1ca196f7efb28 ]
In p9_fd_create_unix, checking is performed to see if the addr (passed as an argument) is NULL or not. However, no check is performed to see if addr is a valid address, i.e., it doesn't entirely consist of only 0's. The initialization of sun_server.sun_path to be equal to this faulty addr value leads to an uninitialized variable, as detected by KMSAN. Checking for this (faulty addr) and returning a negative error number appropriately, resolves this issue.
Link: http://lkml.kernel.org/r/20201012042404.2508-1-anant.thazhemadam@gmail.com Reported-by: syzbot+75d51fe5bf4ebe988518@syzkaller.appspotmail.com Tested-by: syzbot+75d51fe5bf4ebe988518@syzkaller.appspotmail.com Signed-off-by: Anant Thazhemadam anant.thazhemadam@gmail.com Signed-off-by: Dominique Martinet asmadeus@codewreck.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/9p/trans_fd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c index eab058f93ec97..6f8e84844bb27 100644 --- a/net/9p/trans_fd.c +++ b/net/9p/trans_fd.c @@ -991,7 +991,7 @@ p9_fd_create_unix(struct p9_client *client, const char *addr, char *args)
csocket = NULL;
- if (addr == NULL) + if (!addr || !strlen(addr)) return -EINVAL;
if (strlen(addr) >= UNIX_PATH_MAX) {
From: Madhuparna Bhowmik madhuparnabhowmik10@gmail.com
[ Upstream commit 4b2e7f99cdd314263c9d172bc17193b8b6bba463 ]
In rdc321x_wdt_probe(), rdc321x_wdt_device.queue is initialized after misc_register(), hence if ioctl is called before its initialization which can call rdc321x_wdt_start() function, it will see an uninitialized value of rdc321x_wdt_device.queue, hence initialize it before misc_register(). Also, rdc321x_wdt_device.default_ticks is accessed in reset() function called from write callback, thus initialize it before misc_register().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Madhuparna Bhowmik madhuparnabhowmik10@gmail.com Reviewed-by: Guenter Roeck linux@roeck-us.net Reviewed-by: Florian Fainelli f.fainelli@gmail.com Link: https://lore.kernel.org/r/20200807112902.28764-1-madhuparnabhowmik10@gmail.c... Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Wim Van Sebroeck wim@linux-watchdog.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/watchdog/rdc321x_wdt.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/watchdog/rdc321x_wdt.c b/drivers/watchdog/rdc321x_wdt.c index 47a8f1b1087d4..4568af9a165be 100644 --- a/drivers/watchdog/rdc321x_wdt.c +++ b/drivers/watchdog/rdc321x_wdt.c @@ -244,6 +244,8 @@ static int rdc321x_wdt_probe(struct platform_device *pdev)
rdc321x_wdt_device.sb_pdev = pdata->sb_pdev; rdc321x_wdt_device.base_reg = r->start; + rdc321x_wdt_device.queue = 0; + rdc321x_wdt_device.default_ticks = ticks;
err = misc_register(&rdc321x_wdt_misc); if (err < 0) { @@ -258,14 +260,11 @@ static int rdc321x_wdt_probe(struct platform_device *pdev) rdc321x_wdt_device.base_reg, RDC_WDT_RST);
init_completion(&rdc321x_wdt_device.stop); - rdc321x_wdt_device.queue = 0;
clear_bit(0, &rdc321x_wdt_device.inuse);
setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_trigger, 0);
- rdc321x_wdt_device.default_ticks = ticks; - dev_info(&pdev->dev, "watchdog init success\n");
return 0;
From: Jan Kara jack@suse.cz
[ Upstream commit e0770e91424f694b461141cbc99adf6b23006b60 ]
When we try to use file already used as a quota file again (for the same or different quota type), strange things can happen. At the very least lockdep annotations may be wrong but also inode flags may be wrongly set / reset. When the file is used for two quota types at once we can even corrupt the file and likely crash the kernel. Catch all these cases by checking whether passed file is already used as quota file and bail early in that case.
This fixes occasional generic/219 failure due to lockdep complaint.
Reviewed-by: Andreas Dilger adilger@dilger.ca Reported-by: Ritesh Harjani riteshh@linux.ibm.com Signed-off-by: Jan Kara jack@suse.cz Link: https://lore.kernel.org/r/20201015110330.28716-1-jack@suse.cz Signed-off-by: Theodore Ts'o tytso@mit.edu Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ext4/super.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index aca086a25b2ef..6350971852e19 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5185,6 +5185,11 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id, /* Quotafile not on the same filesystem? */ if (path->dentry->d_sb != sb) return -EXDEV; + + /* Quota already enabled for this file? */ + if (IS_NOQUOTA(d_inode(path->dentry))) + return -EBUSY; + /* Journaling quota? */ if (EXT4_SB(sb)->s_qf_names[type]) { /* Quotafile not in fs root? */
From: Fabiano Rosas farosas@linux.ibm.com
[ Upstream commit 05e6295dc7de859c9d56334805485c4d20bebf25 ]
The current nested KVM code does not support HPT guests. This is informed/enforced in some ways:
- Hosts < P9 will not be able to enable the nested HV feature;
- The nested hypervisor MMU capabilities will not contain KVM_CAP_PPC_MMU_HASH_V3;
- QEMU reflects the MMU capabilities in the 'ibm,arch-vec-5-platform-support' device-tree property;
- The nested guest, at 'prom_parse_mmu_model' ignores the 'disable_radix' kernel command line option if HPT is not supported;
- The KVM_PPC_CONFIGURE_V3_MMU ioctl will fail if trying to use HPT.
There is, however, still a way to start a HPT guest by using max-compat-cpu=power8 at the QEMU machine options. This leads to the guest being set to use hash after QEMU calls the KVM_PPC_ALLOCATE_HTAB ioctl.
With the guest set to hash, the nested hypervisor goes through the entry path that has no knowledge of nesting (kvmppc_run_vcpu) and crashes when it tries to execute an hypervisor-privileged (mtspr HDEC) instruction at __kvmppc_vcore_entry:
root@L1:~ $ qemu-system-ppc64 -machine pseries,max-cpu-compat=power8 ...
<snip> [ 538.543303] CPU: 83 PID: 25185 Comm: CPU 0/KVM Not tainted 5.9.0-rc4 #1 [ 538.543355] NIP: c00800000753f388 LR: c00800000753f368 CTR: c0000000001e5ec0 [ 538.543417] REGS: c0000013e91e33b0 TRAP: 0700 Not tainted (5.9.0-rc4) [ 538.543470] MSR: 8000000002843033 <SF,VEC,VSX,FP,ME,IR,DR,RI,LE> CR: 22422882 XER: 20040000 [ 538.543546] CFAR: c00800000753f4b0 IRQMASK: 3 GPR00: c0080000075397a0 c0000013e91e3640 c00800000755e600 0000000080000000 GPR04: 0000000000000000 c0000013eab19800 c000001394de0000 00000043a054db72 GPR08: 00000000003b1652 0000000000000000 0000000000000000 c0080000075502e0 GPR12: c0000000001e5ec0 c0000007ffa74200 c0000013eab19800 0000000000000008 GPR16: 0000000000000000 c00000139676c6c0 c000000001d23948 c0000013e91e38b8 GPR20: 0000000000000053 0000000000000000 0000000000000001 0000000000000000 GPR24: 0000000000000001 0000000000000001 0000000000000000 0000000000000001 GPR28: 0000000000000001 0000000000000053 c0000013eab19800 0000000000000001 [ 538.544067] NIP [c00800000753f388] __kvmppc_vcore_entry+0x90/0x104 [kvm_hv] [ 538.544121] LR [c00800000753f368] __kvmppc_vcore_entry+0x70/0x104 [kvm_hv] [ 538.544173] Call Trace: [ 538.544196] [c0000013e91e3640] [c0000013e91e3680] 0xc0000013e91e3680 (unreliable) [ 538.544260] [c0000013e91e3820] [c0080000075397a0] kvmppc_run_core+0xbc8/0x19d0 [kvm_hv] [ 538.544325] [c0000013e91e39e0] [c00800000753d99c] kvmppc_vcpu_run_hv+0x404/0xc00 [kvm_hv] [ 538.544394] [c0000013e91e3ad0] [c0080000072da4fc] kvmppc_vcpu_run+0x34/0x48 [kvm] [ 538.544472] [c0000013e91e3af0] [c0080000072d61b8] kvm_arch_vcpu_ioctl_run+0x310/0x420 [kvm] [ 538.544539] [c0000013e91e3b80] [c0080000072c7450] kvm_vcpu_ioctl+0x298/0x778 [kvm] [ 538.544605] [c0000013e91e3ce0] [c0000000004b8c2c] sys_ioctl+0x1dc/0xc90 [ 538.544662] [c0000013e91e3dc0] [c00000000002f9a4] system_call_exception+0xe4/0x1c0 [ 538.544726] [c0000013e91e3e20] [c00000000000d140] system_call_common+0xf0/0x27c [ 538.544787] Instruction dump: [ 538.544821] f86d1098 60000000 60000000 48000099 e8ad0fe8 e8c500a0 e9264140 75290002 [ 538.544886] 7d1602a6 7cec42a6 40820008 7d0807b4 <7d164ba6> 7d083a14 f90d10a0 480104fd [ 538.544953] ---[ end trace 74423e2b948c2e0c ]---
This patch makes the KVM_PPC_ALLOCATE_HTAB ioctl fail when running in the nested hypervisor, causing QEMU to abort.
Reported-by: Satheesh Rajendran sathnaga@linux.vnet.ibm.com Signed-off-by: Fabiano Rosas farosas@linux.ibm.com Reviewed-by: Greg Kurz groug@kaod.org Reviewed-by: David Gibson david@gibson.dropbear.id.au Signed-off-by: Paul Mackerras paulus@ozlabs.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/kvm/book3s_hv.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 54c6ba87a25ad..b005ce9dc8f04 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -3157,6 +3157,12 @@ static long kvm_arch_vm_ioctl_hv(struct file *filp, case KVM_PPC_ALLOCATE_HTAB: { u32 htab_order;
+ /* If we're a nested hypervisor, we currently only support radix */ + if (kvmhv_on_pseries()) { + r = -EOPNOTSUPP; + break; + } + r = -EFAULT; if (get_user(htab_order, (u32 __user *)argp)) break;
From: Anant Thazhemadam anant.thazhemadam@gmail.com
[ Upstream commit 0ddc5154b24c96f20e94d653b0a814438de6032b ]
In gfs2_check_sb(), no validation checks are performed with regards to the size of the superblock. syzkaller detected a slab-out-of-bounds bug that was primarily caused because the block size for a superblock was set to zero. A valid size for a superblock is a power of 2 between 512 and PAGE_SIZE. Performing validation checks and ensuring that the size of the superblock is valid fixes this bug.
Reported-by: syzbot+af90d47a37376844e731@syzkaller.appspotmail.com Tested-by: syzbot+af90d47a37376844e731@syzkaller.appspotmail.com Suggested-by: Andrew Price anprice@redhat.com Signed-off-by: Anant Thazhemadam anant.thazhemadam@gmail.com [Minor code reordering.] Signed-off-by: Andreas Gruenbacher agruenba@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/gfs2/ops_fstype.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index b7b43d00cc6d7..8ed2b1a716376 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -160,15 +160,19 @@ static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent) return -EINVAL; }
- /* If format numbers match exactly, we're done. */ - - if (sb->sb_fs_format == GFS2_FORMAT_FS && - sb->sb_multihost_format == GFS2_FORMAT_MULTI) - return 0; + if (sb->sb_fs_format != GFS2_FORMAT_FS || + sb->sb_multihost_format != GFS2_FORMAT_MULTI) { + fs_warn(sdp, "Unknown on-disk format, unable to mount\n"); + return -EINVAL; + }
- fs_warn(sdp, "Unknown on-disk format, unable to mount\n"); + if (sb->sb_bsize < 512 || sb->sb_bsize > PAGE_SIZE || + (sb->sb_bsize & (sb->sb_bsize - 1))) { + pr_warn("Invalid superblock size\n"); + return -EINVAL; + }
- return -EINVAL; + return 0; }
static void end_bio_io_page(struct bio *bio)
From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit fd22781648080cc400772b3c68aa6b059d2d5420 ]
Callers are generally not supposed to check the return values from debugfs functions. Debugfs functions never return NULL so this error handling will never trigger. (Historically debugfs functions used to return a mix of NULL and error pointers but it was eventually deemed too complicated for something which wasn't intended to be used in normal situations).
Delete all the error handling.
Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Acked-by: Santosh Shilimkar ssantosh@kernel.org Link: https://lore.kernel.org/r/20200826113759.GF393664@mwanda Signed-off-by: Krzysztof Kozlowski krzk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/memory/emif.c | 33 +++++---------------------------- 1 file changed, 5 insertions(+), 28 deletions(-)
diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index 04644e7b42b12..88c32b8dc88a1 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -165,35 +165,12 @@ static const struct file_operations emif_mr4_fops = {
static int __init_or_module emif_debugfs_init(struct emif_data *emif) { - struct dentry *dentry; - int ret; - - dentry = debugfs_create_dir(dev_name(emif->dev), NULL); - if (!dentry) { - ret = -ENOMEM; - goto err0; - } - emif->debugfs_root = dentry; - - dentry = debugfs_create_file("regcache_dump", S_IRUGO, - emif->debugfs_root, emif, &emif_regdump_fops); - if (!dentry) { - ret = -ENOMEM; - goto err1; - } - - dentry = debugfs_create_file("mr4", S_IRUGO, - emif->debugfs_root, emif, &emif_mr4_fops); - if (!dentry) { - ret = -ENOMEM; - goto err1; - } - + emif->debugfs_root = debugfs_create_dir(dev_name(emif->dev), NULL); + debugfs_create_file("regcache_dump", S_IRUGO, emif->debugfs_root, emif, + &emif_regdump_fops); + debugfs_create_file("mr4", S_IRUGO, emif->debugfs_root, emif, + &emif_mr4_fops); return 0; -err1: - debugfs_remove_recursive(emif->debugfs_root); -err0: - return ret; }
static void __exit emif_debugfs_exit(struct emif_data *emif)
From: Krzysztof Kozlowski krzk@kernel.org
[ Upstream commit bb98fff84ad1ea321823759edaba573a16fa02bd ]
The Power Management Unit (PMU) is a separate device which has little common with clock controller. Moving it to one level up (from clock controller child to SoC) allows to remove fake simple-bus compatible and dtbs_check warnings like:
clock-controller@e0100000: $nodename:0: 'clock-controller@e0100000' does not match '^([a-z][a-z0-9\-]+-bus|bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'
Signed-off-by: Krzysztof Kozlowski krzk@kernel.org Tested-by: Jonathan Bakker xc-racer2@live.ca Link: https://lore.kernel.org/r/20200907161141.31034-8-krzk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/boot/dts/s5pv210.dtsi | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/arch/arm/boot/dts/s5pv210.dtsi b/arch/arm/boot/dts/s5pv210.dtsi index b03fe747b98ca..b78346d9c319e 100644 --- a/arch/arm/boot/dts/s5pv210.dtsi +++ b/arch/arm/boot/dts/s5pv210.dtsi @@ -99,19 +99,16 @@ chipid@e0000000 { };
clocks: clock-controller@e0100000 { - compatible = "samsung,s5pv210-clock", "simple-bus"; + compatible = "samsung,s5pv210-clock"; reg = <0xe0100000 0x10000>; clock-names = "xxti", "xusbxti"; clocks = <&xxti>, <&xusbxti>; #clock-cells = <1>; - #address-cells = <1>; - #size-cells = <1>; - ranges; + };
- pmu_syscon: syscon@e0108000 { - compatible = "samsung-s5pv210-pmu", "syscon"; - reg = <0xe0108000 0x8000>; - }; + pmu_syscon: syscon@e0108000 { + compatible = "samsung-s5pv210-pmu", "syscon"; + reg = <0xe0108000 0x8000>; };
pinctrl0: pinctrl@e0200000 {
From: Krzysztof Kozlowski krzk@kernel.org
[ Upstream commit 6c17a2974abf68a58517f75741b15c4aba42b4b8 ]
The 'audio-subsystem' node is an artificial creation, not representing real hardware. The hardware is described by its nodes - AUDSS clock controller and I2S0.
Remove the 'audio-subsystem' node along with its undocumented compatible to fix dtbs_check warnings like:
audio-subsystem: $nodename:0: 'audio-subsystem' does not match '^([a-z][a-z0-9\-]+-bus|bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'
Signed-off-by: Krzysztof Kozlowski krzk@kernel.org Tested-by: Jonathan Bakker xc-racer2@live.ca Link: https://lore.kernel.org/r/20200907161141.31034-9-krzk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/boot/dts/s5pv210.dtsi | 65 +++++++++++++++------------------- 1 file changed, 29 insertions(+), 36 deletions(-)
diff --git a/arch/arm/boot/dts/s5pv210.dtsi b/arch/arm/boot/dts/s5pv210.dtsi index b78346d9c319e..48bcab25720a5 100644 --- a/arch/arm/boot/dts/s5pv210.dtsi +++ b/arch/arm/boot/dts/s5pv210.dtsi @@ -225,43 +225,36 @@ i2c2: i2c@e1a00000 { status = "disabled"; };
- audio-subsystem { - compatible = "samsung,s5pv210-audss", "simple-bus"; - #address-cells = <1>; - #size-cells = <1>; - ranges; - - clk_audss: clock-controller@eee10000 { - compatible = "samsung,s5pv210-audss-clock"; - reg = <0xeee10000 0x1000>; - clock-names = "hclk", "xxti", - "fout_epll", - "sclk_audio0"; - clocks = <&clocks DOUT_HCLKP>, <&xxti>, - <&clocks FOUT_EPLL>, - <&clocks SCLK_AUDIO0>; - #clock-cells = <1>; - }; + clk_audss: clock-controller@eee10000 { + compatible = "samsung,s5pv210-audss-clock"; + reg = <0xeee10000 0x1000>; + clock-names = "hclk", "xxti", + "fout_epll", + "sclk_audio0"; + clocks = <&clocks DOUT_HCLKP>, <&xxti>, + <&clocks FOUT_EPLL>, + <&clocks SCLK_AUDIO0>; + #clock-cells = <1>; + };
- i2s0: i2s@eee30000 { - compatible = "samsung,s5pv210-i2s"; - reg = <0xeee30000 0x1000>; - interrupt-parent = <&vic2>; - interrupts = <16>; - dma-names = "rx", "tx", "tx-sec"; - dmas = <&pdma1 9>, <&pdma1 10>, <&pdma1 11>; - clock-names = "iis", - "i2s_opclk0", - "i2s_opclk1"; - clocks = <&clk_audss CLK_I2S>, - <&clk_audss CLK_I2S>, - <&clk_audss CLK_DOUT_AUD_BUS>; - samsung,idma-addr = <0xc0010000>; - pinctrl-names = "default"; - pinctrl-0 = <&i2s0_bus>; - #sound-dai-cells = <0>; - status = "disabled"; - }; + i2s0: i2s@eee30000 { + compatible = "samsung,s5pv210-i2s"; + reg = <0xeee30000 0x1000>; + interrupt-parent = <&vic2>; + interrupts = <16>; + dma-names = "rx", "tx", "tx-sec"; + dmas = <&pdma1 9>, <&pdma1 10>, <&pdma1 11>; + clock-names = "iis", + "i2s_opclk0", + "i2s_opclk1"; + clocks = <&clk_audss CLK_I2S>, + <&clk_audss CLK_I2S>, + <&clk_audss CLK_DOUT_AUD_BUS>; + samsung,idma-addr = <0xc0010000>; + pinctrl-names = "default"; + pinctrl-0 = <&i2s0_bus>; + #sound-dai-cells = <0>; + status = "disabled"; };
i2s1: i2s@e2100000 {
linux-stable-mirror@lists.linaro.org
-
Sasha Levin