The following kernel warning noticed on arm64 qemu-arm64 and rk3399-rock-pi-4 device while running selftests ftrace tests on Linux next-20240613.

This is always reproducible on qemu-arm64 and rock-pi-4 device with kselftest merge configs

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

Test log: ------- kselftest: Running tests in ftrace TAP version 13 1..1 # timeout set to 0 # selftests: ftrace: ftracetest-ktap # unlink: cannot unlink '/opt/kselftests/default-in-kernel/ftrace/logs/latest': No such file or directory # TAP version 13 # 1..141 # ok 1 Basic trace file check <4>[ 96.183553] ------------[ cut here ]------------ <4>[ 96.187100] WARNING: CPU: 1 PID: 538 at arch/arm64/kernel/stacktrace.c:112 arch_stack_walk (arch/arm64/kernel/stacktrace.c:112 (discriminator 1) arch/arm64/kernel/stacktrace.c:155 (discriminator 1) arch/arm64/kernel/stacktrace.c:172 (discriminator 1) arch/arm64/kernel/stacktrace.c:243 (discriminator 1) arch/arm64/kernel/stacktrace.c:267 (discriminator 1)) <4>[ 96.188005] Modules linked in: crct10dif_ce sm3_ce sm3 sha3_ce sha512_ce sha512_arm64 fuse drm backlight dm_mod ip_tables x_tables <4>[ 96.189034] CPU: 1 PID: 538 Comm: ftracetest Not tainted 6.10.0-rc3-next-20240613 #1 <4>[ 96.189183] Hardware name: linux,dummy-virt (DT) <4>[ 96.189366] pstate: 624000c9 (nZCv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--) <4>[ 96.189529] pc : arch_stack_walk (arch/arm64/kernel/stacktrace.c:112 (discriminator 1) arch/arm64/kernel/stacktrace.c:155 (discriminator 1) arch/arm64/kernel/stacktrace.c:172 (discriminator 1) arch/arm64/kernel/stacktrace.c:243 (discriminator 1) arch/arm64/kernel/stacktrace.c:267 (discriminator 1)) <4>[ 96.189562] lr : arch_stack_walk (arch/arm64/kernel/stacktrace.c:109 arch/arm64/kernel/stacktrace.c:155 arch/arm64/kernel/stacktrace.c:172 arch/arm64/kernel/stacktrace.c:243 arch/arm64/kernel/stacktrace.c:267) <4>[ 96.189593] sp : ffff80008000bdf0 <4>[ 96.189610] x29: ffff80008000be80 x28: ffff9969bab84000 x27: ffff9969b9c53b98 <4>[ 96.189702] x26: ffff9969bb6a60c0 x25: ffff9969b9c53b98 x24: 0000000082000000 <4>[ 96.189775] x23: 65cf9969b8823ddc x22: ffff9969b882e518 x21: ffff9969b8836200 <4>[ 96.189809] x20: ffff80008000bec8 x19: ffff9969b8823d70 x18: 0000000002000000 <4>[ 96.189842] x17: 0000000000000000 x16: ffff800080008000 x15: 00001e8480000000 <4>[ 96.189876] x14: 000000000003d090 x13: 0000000000000000 x12: 003d090000000000 <4>[ 96.189910] x11: ffff9969bb764150 x10: ffff80008000bf30 x9 : ffff9969b88b2970 <4>[ 96.189958] x8 : ffff9969b882e518 x7 : 0000000000000000 x6 : 0000000000000023 <4>[ 96.189990] x5 : 0000000000000000 x4 : ffff80008000bf30 x3 : ffff80008000bfe0 <4>[ 96.190021] x2 : ffff9969b882e518 x1 : ffff9969b882e518 x0 : ffff9969b882e518 <4>[ 96.190145] Call trace: <4>[ 96.190196] arch_stack_walk (arch/arm64/kernel/stacktrace.c:112 (discriminator 1) arch/arm64/kernel/stacktrace.c:155 (discriminator 1) arch/arm64/kernel/stacktrace.c:172 (discriminator 1) arch/arm64/kernel/stacktrace.c:243 (discriminator 1) arch/arm64/kernel/stacktrace.c:267 (discriminator 1)) <4>[ 96.190269] return_address (arch/arm64/kernel/return_address.c:45) <4>[ 96.190335] trace_hardirqs_on (kernel/trace/trace_preemptirq.c:56 (discriminator 1)) <4>[ 96.190372] handle_softirqs (arch/arm64/include/asm/irqflags.h:26 arch/arm64/include/asm/irqflags.h:48 kernel/softirq.c:538) <4>[ 96.190744] ---[ end trace 0000000000000000 ]--- # ok 2 Basic test for tracers

metadata: ------ git_describe: next-20240613 git_ref: master git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git_sha: 6906a84c482f098d31486df8dc98cead21cce2d0 git_short_log: 6906a84c482f ("Add linux-next specific files for 20240613") arch: arm and arm64 config: kselftest merge configs

Links: - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240613/tes... - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240613/tes... - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2hoMyyk19L9...

Build reproduce: -- - https://storage.tuxsuite.com/public/linaro/lkft/builds/2hoMxP9HQelutO3feaEW1... - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2hoMyyk19L9...

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