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dkim=pass header.d=gmx.net header.s=badeba3b8450 header.b=EqbHJb+Z; spf=pass (imf26.hostedemail.com: domain of quwenruo.btrfs@gmx.com designates 212.227.17.22 as permitted sender) smtp.mailfrom=quwenruo.btrfs@gmx.com; dmarc=pass (policy=none) header.from=gmx.com X-Stat-Signature: zuq8h6ssqupkgfwpsb7zcwed8zg68jpx X-HE-Tag: 1646120865-85811 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2022/3/1 14:30, kernel test robot wrote: > > > Greeting, > > FYI, we noticed the following commit (built with gcc-9): > > commit: 3626a285f87dceb4ca649d0ef015d7b295206cdf ("btrfs: introduce dedi= cated helper to scrub simple-stripe based range") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master > > in testcase: xfstests > version: xfstests-x86_64-1de1db8-1_20220217 > with following parameters: > > disk: 6HDD > fs: btrfs > test: btrfs-group-07 > ucode: 0x28 > > test-description: xfstests is a regression test suite for xfs and other = files ystems. > test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git > > > on test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.4= 0GHz with 8G memory > > caused below changes (please refer to attached dmesg/kmsg for entire log= /backtrace): > > > > If you fix the issue, kindly add following tag > Reported-by: kernel test robot > > > [ 65.408303][ T3224] BTRFS info (device sdb2): flagging fs with big me= tadata feature > [ 65.415944][ T3224] BTRFS info (device sdb2): disk space caching is e= nabled > [ 65.422842][ T3224] BTRFS info (device sdb2): has skinny extents > [ 65.436656][ T3224] BTRFS info (device sdb2): checking UUID tree > [ 66.134430][ T3293] BTRFS info (device sdb2): dev_replace from /dev/s= db3 (devid 2) to /dev/sdb6 started > [ 67.823326][ T3293] divide error: 0000 [#1] SMP KASAN PTI > [ 67.828668][ T3293] CPU: 3 PID: 3293 Comm: btrfs Not tainted 5.17.0-r= c5-00101-g3626a285f87d #1 > [ 67.837169][ T3293] Hardware name: Dell Inc. OptiPlex 9020/0DNKMN, BI= OS A05 12/05/2013 > [ 67.844982][ T3293] RIP: 0010:scrub_stripe (kbuild/src/consumer/fs/btrf= s/scrub.c:3448 kbuild/src/consumer/fs/btrfs/scrub.c:3486 kbuild/src/consum= er/fs/btrfs/scrub.c:3644) btrfs > [ 67.850976][ T3293] Code: 00 00 fc ff df 48 89 f9 48 c1 e9 03 0f b6 0c = 11 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 27 09 00 00 41 8b 5d= 1c 99 fb 48 8b 54 24 30 48 c1 ea 03 48 63 e8 48 b8 00 00 00 00 00 fc > All code This is weird, the code is from simple_stripe_full_stripe_len(), which means the chunk map must be RAID0 or RAID10. In that case, their sub_stripes should be either 1 or 2, why we got 0 ther= e? In fact, from volumes.c, all sub_stripes is from btrfs_raid_array[], which all have either 1 or 2 sub_stripes. Although the code is old, not the latest version, it should still not cause such problem. Mind to retest with my branch to see if it can be reproduced? https://github.com/adam900710/linux/tree/refactor_scrub Thanks, Qu > =3D=3D=3D=3D=3D=3D=3D=3D > 0: 00 00 add %al,(%rax) > 2: fc cld > 3: ff (bad) > 4: df 48 89 fisttps -0x77(%rax) > 7: f9 stc > 8: 48 c1 e9 03 shr $0x3,%rcx > c: 0f b6 0c 11 movzbl (%rcx,%rdx,1),%ecx > 10: 48 89 fa mov %rdi,%rdx > 13: 83 e2 07 and $0x7,%edx > 16: 83 c2 03 add $0x3,%edx > 19: 38 ca cmp %cl,%dl > 1b: 7c 08 jl 0x25 > 1d: 84 c9 test %cl,%cl > 1f: 0f 85 27 09 00 00 jne 0x94c > 25: 41 8b 5d 1c mov 0x1c(%r13),%ebx > 29: 99 cltd > 2a:* f7 fb idiv %ebx <-- trapping instruction > 2c: 48 8b 54 24 30 mov 0x30(%rsp),%rdx > 31: 48 c1 ea 03 shr $0x3,%rdx > 35: 48 63 e8 movslq %eax,%rbp > 38: 48 rex.W > 39: b8 00 00 00 00 mov $0x0,%eax > 3e: 00 fc add %bh,%ah > > Code starting with the faulting instruction > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > 0: f7 fb idiv %ebx > 2: 48 8b 54 24 30 mov 0x30(%rsp),%rdx > 7: 48 c1 ea 03 shr $0x3,%rdx > b: 48 63 e8 movslq %eax,%rbp > e: 48 rex.W > f: b8 00 00 00 00 mov $0x0,%eax > 14: 00 fc add %bh,%ah > [ 67.870187][ T3293] RSP: 0018:ffffc9000a71f450 EFLAGS: 00010246 > [ 67.876028][ T3293] RAX: 0000000000000004 RBX: 0000000000000000 RCX: = 0000000000000000 > [ 67.883756][ T3293] RDX: 0000000000000000 RSI: 0000000000000004 RDI: = ffff888129ec6d1c > [ 67.891491][ T3293] RBP: ffff8881453682a0 R08: 0000000000000001 R09: = 0000000000000000 > [ 67.899230][ T3293] R10: ffff88821534a063 R11: ffffed1042a6940c R12: = ffff888121238000 > [ 67.906955][ T3293] R13: ffff888129ec6d00 R14: ffff888145368000 R15: = 0000000000000008 > [ 67.914680][ T3293] FS: 00007f2851eb08c0(0000) GS:ffff8881a6d80000(0= 000) knlGS:0000000000000000 > [ 67.923351][ T3293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 67.929709][ T3293] CR2: 00007ffea4ff07f8 CR3: 000000010a0fc005 CR4: = 00000000001706e0 > [ 67.937437][ T3293] DR0: 0000000000000000 DR1: 0000000000000000 DR2: = 0000000000000000 > [ 67.945163][ T3293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: = 0000000000000400 > [ 67.952891][ T3293] Call Trace: > [ 67.955992][ T3293] > [ 67.958749][ T3293] ? kasan_save_stack (kbuild/src/consumer/mm/kasan/co= mmon.c:39) > [ 67.963395][ T3293] ? kasan_set_track (kbuild/src/consumer/mm/kasan/com= mon.c:45) > [ 67.967951][ T3293] ? kasan_set_free_info (kbuild/src/consumer/mm/kasan= /generic.c:372) > [ 67.972851][ T3293] ? mutex_unlock (kbuild/src/consumer/arch/x86/includ= e/asm/atomic64_64.h:190 kbuild/src/consumer/include/linux/atomic/atomic-lo= ng.h:449 kbuild/src/consumer/include/linux/atomic/atomic-instrumented.h:17= 90 kbuild/src/consumer/kernel/locking/mutex.c:178 kbuild/src/consumer/kern= el/locking/mutex.c:537) > > > To reproduce: > > git clone https://github.com/intel/lkp-tests.git > cd lkp-tests > sudo bin/lkp install job.yaml # job file is attached = in this email > bin/lkp split-job --compatible job.yaml # generate the yaml fil= e for lkp run > sudo bin/lkp run generated-yaml-file > > # if come across any failure that blocks the test, > # please remove ~/.lkp and /lkp dir to run from a clean state. > > > > --- > 0DAY/LKP+ Test Infrastructure Open Source Technology C= enter > https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corpor= ation > > Thanks, > Oliver Sang >