[LTP] selftests: core: unshare_test: WARNING: at mm/util.c:671 __kvmalloc_node_noprof

[Naresh Kamboju]

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

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

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
  kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2l2pZRzhgRkPgXIKLJCI7vwVd6t/config
  artifact location:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2l2pZRzhgRkPgXIKLJCI7vwVd6t/
  build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2l2pZRzhgRkPgXIKLJCI7vwVd6t/
  toolchain: clang-18 and gcc-13

Steps to reproduce:
---------
 - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2l2paZVYTloIDBYnua1s12DeIic/reproducer
 - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2l2paZVYTloIDBYnua1s12DeIic/tux_plan

Please let me know if you need more information.

--
Linaro LKFT
https://lkft.linaro.org