On Wed, 24 May 2023 12:39:40 +0200 Christian Brauner <brauner@xxxxxxxxxx> wrote: > On Wed, May 24, 2023 at 02:32:25PM +0530, Naresh Kamboju wrote: > > While running LTP tracing tests on qemu-x86_64 following kernel crash noticed > > with stable-rc 6.3.4-rc2. > > > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> > > > > FAILED COMMAND File: > > /lava-1/0/tests/0_ltp-tracing/automated/linux/ltp/output/LTP_tracing.failed > > TCONF COMMAND File: /opt/ltp/output/LTP_RUN_ON-LTP_tracing.log.tconf > > Running tests....... > > No idea and seems very odd. Only thing I see is that there's ftrace > regression testing running while the crash happens. It sounds like there is a timing issue on int3 self-modifying code @ alternative.c ftrace@x86 uses it for arming/disarming mcount(fentry) call. I would like to know what is the actual command to run it. The above files are local file, and no actual commands recorded in the full log. Thank you, > > > > > <4>[ 57.932577] int3: 0000 [#1] PREEMPT SMP PTI > > <4>[ 57.933090] CPU: 0 PID: 138 Comm: systemd-udevd Not tainted 6.3.4-rc2 #1 > > <4>[ 57.933243] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), > > BIOS 1.14.0-2 04/01/2014 > > <4>[ 57.933447] RIP: 0010:security_inode_permission+0x5/0x70 > > <4>[ 57.934163] Code: c0 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 > > 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 > > 0f 1f 00 e8 <e7> 8d 64 18 f6 47 0d 02 75 50 55 48 89 e5 41 55 41 89 f5 > > 41 54 49 > > <4>[ 57.934257] RSP: 0018:ffffa300c050bca0 EFLAGS: 00000246 > > <4>[ 57.934363] RAX: 00000000000041ed RBX: ffff9bda012805c0 RCX: > > 0000000000000000 > > <4>[ 57.934390] RDX: ffff9bda01f6df00 RSI: 0000000000000081 RDI: > > ffff9bda012805c0 > > <4>[ 57.934415] RBP: ffffa300c050bcd0 R08: ffffa300c050bd80 R09: > > 00000000ffffff9c > > <4>[ 57.934440] R10: 0000000000000fe0 R11: ffc9d09b99d09993 R12: > > 0000000000000081 > > <4>[ 57.934465] R13: 0000000000000000 R14: ffffffffa958f970 R15: > > 2f2f2f2f2f2f2f2f > > <4>[ 57.934544] FS: 00007fb89665f800(0000) > > GS:ffff9bda7bc00000(0000) knlGS:0000000000000000 > > <4>[ 57.934578] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > <4>[ 57.934604] CR2: 00007f60c9b0e000 CR3: 0000000104402000 CR4: > > 00000000000006f0 > > <4>[ 57.934793] Call Trace: > > <4>[ 57.934958] <TASK> > > <4>[ 57.935082] ? inode_permission+0x70/0x1a0 > > <4>[ 57.935235] link_path_walk.part.0.constprop.0+0xdd/0x3b0 > > <4>[ 57.935360] path_lookupat+0x3e/0x190 > > <4>[ 57.935426] filename_lookup+0xe8/0x1f0 > > <4>[ 57.935638] user_path_at_empty+0x42/0x60 > > <4>[ 57.935692] do_fchmodat+0x5f/0xc0 > > <4>[ 57.935809] __x64_sys_chmod+0x1f/0x30 > > <4>[ 57.935845] do_syscall_64+0x3e/0x90 > > <4>[ 57.935886] entry_SYSCALL_64_after_hwframe+0x72/0xdc > > <4>[ 57.935996] RIP: 0033:0x7fb8964fbd6b > > <4>[ 57.936393] Code: ff ff ff ff eb e6 66 0f 1f 84 00 00 00 00 00 > > f3 0f 1e fa b8 5f 00 00 00 0f 05 c3 0f 1f 40 00 f3 0f 1e fa b8 5a 00 > > 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 85 40 0f 00 f7 d8 64 > > 89 01 48 > > <4>[ 57.936422] RSP: 002b:00007ffcf4c2aa38 EFLAGS: 00000202 > > ORIG_RAX: 000000000000005a > > <4>[ 57.936471] RAX: ffffffffffffffda RBX: 0000000000000190 RCX: > > 00007fb8964fbd6b > > <4>[ 57.936490] RDX: 00007ffcf4c2aa4f RSI: 0000000000000190 RDI: > > 00007ffcf4c2aa40 > > <4>[ 57.936504] RBP: 0000000000000190 R08: 0000000000000000 R09: > > 00007ffcf4c2a8e0 > > <4>[ 57.936528] R10: 0000000000000000 R11: 0000000000000202 R12: > > 00007ffcf4c2aa40 > > <4>[ 57.936542] R13: 0000000000000005 R14: 0000000000000000 R15: > > 0000000000000001 > > <4>[ 57.936754] </TASK> > > <4>[ 57.936853] Modules linked in: > > <4>[ 57.962890] ---[ end trace 0000000000000000 ]--- > > <4>[ 57.963006] RIP: 0010:security_inode_permission+0x5/0x70 > > <4>[ 57.963080] Code: c0 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 > > 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 > > 0f 1f 00 e8 <e7> 8d 64 18 f6 47 0d 02 75 50 55 48 89 e5 41 55 41 89 f5 > > 41 54 49 > > <4>[ 57.963105] RSP: 0018:ffffa300c050bca0 EFLAGS: 00000246 > > <4>[ 57.963145] RAX: 00000000000041ed RBX: ffff9bda012805c0 RCX: > > 0000000000000000 > > <4>[ 57.963163] RDX: ffff9bda01f6df00 RSI: 0000000000000081 RDI: > > ffff9bda012805c0 > > <4>[ 57.963180] RBP: ffffa300c050bcd0 R08: ffffa300c050bd80 R09: > > 00000000ffffff9c > > <4>[ 57.963195] R10: 0000000000000fe0 R11: ffc9d09b99d09993 R12: > > 0000000000000081 > > <4>[ 57.963209] R13: 0000000000000000 R14: ffffffffa958f970 R15: > > 2f2f2f2f2f2f2f2f > > <4>[ 57.963226] FS: 00007fb89665f800(0000) > > GS:ffff9bda7bc00000(0000) knlGS:0000000000000000 > > <4>[ 57.963246] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > <4>[ 57.963261] CR2: 00007f60c9b0e000 CR3: 0000000104402000 CR4: > > 00000000000006f0 > > <0>[ 57.963444] Kernel panic - not syncing: Fatal exception in interrupt > > <0>[ 57.964629] Kernel Offset: 0x26600000 from 0xffffffff81000000 > > (relocation range: 0xffffffff80000000-0xffffffffbfffffff) > > > > > > links, > > - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.3.y/build/v6.3.3-364-ga37c304c022d/testrun/17168198/suite/log-parser-test/tests/ > > - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.3.y/build/v6.3.3-364-ga37c304c022d/testrun/17168198/suite/log-parser-test/test/check-kernel-panic/log > > - https://storage.tuxsuite.com/public/linaro/lkft/builds/2QCeudZ18KF3RXw3A5qfr5lPC2N/ > > - https://storage.tuxsuite.com/public/linaro/lkft/builds/2QCeudZ18KF3RXw3A5qfr5lPC2N/config > > > > -- > > Linaro LKFT > > https://lkft.linaro.org -- Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
