On Wed, Dec 11, 2024 at 11:09:46AM +0530, Naresh Kamboju wrote:
[Gentle Reminder]
On Mon, 26 Aug 2024 at 18:50, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote:
The following kernel warning is noticed on all arch and all devices while
running selftests: core: unshare_test on Linux next-20240823 and next-20240826.
First seen on next-20240823.
Good: next-20240822
BAD: next-20240823 and next-20240826
This is an open issue from August.
The reported kernel warning is still seen on linux next and mainline
while running selftests: core: unshare_test.
I attempted a bisection of the range provided above, and that has landed
on: 611fbeb44a77 ("selftests:core: test coverage for dup_fd() failure
handling in unshare_fd()"), so the underlying issue was probably there
for much longer.
Al, any thoughts on what could trigger this? I'm assuming you had
something in mind when you added the above test?
Linux version: 6.13.0-rc2-next-20241210
Crash log:
--------
# selftests: core: unshare_test
<4>[ 61.084149] ------------[ cut here ]------------
<4>[ 61.085175] WARNING: CPU: 0 PID: 477 at mm/util.c:671
__kvmalloc_node_noprof (mm/util.c:671 (discriminator 1))
<4>[ 61.088958] Modules linked in: crct10dif_ce sm3_ce sm3 sha3_ce
sha512_ce sha512_arm64 drm fuse backlight dm_mod ip_tables x_tables
<4>[ 61.093141] CPU: 0 UID: 0 PID: 477 Comm: unshare_test Not
tainted 6.11.0-rc5-next-20240826 #1
<4>[ 61.094558] Hardware name: linux,dummy-virt (DT)
<4>[ 61.096763] pstate: 23400009 (nzCv daif +PAN -UAO +TCO +DIT
-SSBS BTYPE=--)
<4>[ 61.097841] pc : __kvmalloc_node_noprof (mm/util.c:671 (discriminator 1))
<4>[ 61.099701] lr : __kvmalloc_node_noprof (mm/util.c:661)
<4>[ 61.100448] sp : ffff800080abbce0
<4>[ 61.100819] x29: ffff800080abbcf0 x28: fff0000004549280 x27:
0000000000000000
<4>[ 61.101744] x26: 0000000000000000 x25: 0000000000000000 x24:
fff0000003615e40
<4>[ 61.102512] x23: fff0000003615ec0 x22: bfafa45863b285c8 x21:
0000000200002000
<4>[ 61.103232] x20: 00000000ffffffff x19: 0000000000400cc0 x18:
0000000000000000
<4>[ 61.104053] x17: 0000000000000000 x16: 0000000000000000 x15:
0000000000000000
<4>[ 61.104927] x14: 0000000000000000 x13: 0000000000000000 x12:
0000000000000000
<4>[ 61.105752] x11: 0000000000000000 x10: 0000000000000000 x9 :
0000000000000000
<4>[ 61.106606] x8 : 0000000000000001 x7 : 0000000000000001 x6 :
0000000000000005
<4>[ 61.107377] x5 : 0000000000000000 x4 : fff0000004549280 x3 :
0000000000000000
<4>[ 61.108207] x2 : 0000000000000000 x1 : 000000007fffffff x0 :
0000000000000000
<4>[ 61.109262] Call trace:
<4>[ 61.109619] __kvmalloc_node_noprof (mm/util.c:671 (discriminator 1))
<4>[ 61.110248] alloc_fdtable (fs/file.c:133)
<4>[ 61.110751] expand_files
(include/linux/atomic/atomic-arch-fallback.h:457
include/linux/atomic/atomic-instrumented.h:33 fs/file.c:177
fs/file.c:238)
<4>[ 61.111171] ksys_dup3 (fs/file.c:1337)
<4>[ 61.111596] __arm64_sys_dup3 (fs/file.c:1355)
<4>[ 61.112006] invoke_syscall (arch/arm64/include/asm/current.h:19
arch/arm64/kernel/syscall.c:54)
<4>[ 61.112480] el0_svc_common.constprop.0
(include/linux/thread_info.h:127 (discriminator 2)
arch/arm64/kernel/syscall.c:140 (discriminator 2))
<4>[ 61.112955] do_el0_svc (arch/arm64/kernel/syscall.c:152)
<4>[ 61.113384] el0_svc (arch/arm64/include/asm/irqflags.h:55
arch/arm64/include/asm/irqflags.h:76
arch/arm64/kernel/entry-common.c:165
arch/arm64/kernel/entry-common.c:178
arch/arm64/kernel/entry-common.c:713)
<4>[ 61.113742] el0t_64_sync_handler (arch/arm64/kernel/entry-common.c:731)
<4>[ 61.115181] el0t_64_sync (arch/arm64/kernel/entry.S:598)
<4>[ 61.115709] ---[ end trace 0000000000000000 ]---
Crash Log links,
--------
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240826/testrun/24953436/suite/log-parser-test/test/check-kernel-exception-warning-cpu-pid-at-mmutilc-__kvmalloc_node_noprof/log
Crash failed comparison:
----------
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240826/testrun/24953436/suite/log-parser-test/test/check-kernel-exception-warning-cpu-pid-at-mmutilc-__kvmalloc_node_noprof/history/
metadata:
----
git describe: next-20240823 and next-20240826
git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
git sha: c79c85875f1af04040fe4492ed94ce37ad729c4d
Please let me know if you need more information.
Kernel warning log:
-----------------
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241210/testrun/26261199/suite/kselftest-core/test/core_unshare_test/log
--
Linaro LKFT
https://lkft.linaro.org
--
Mailing list info: https://lists.linux.it/listinfo/ltp
--
Thanks,
Sasha
