Following kernel BUG noticed while running selftests arm64 fp-stress running stable rc kernel versions 6.1.29-rc1 and 6.3.3-rc1.
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
# selftests: arm64: fp-stress # TAP version 13 # 1..80 # # 8 CPUs, 3 SVE VLs, 3 SME VLs, SME2 absent # # Will run for 10s ...
# # ZA-VL-32-4: PID: 1091 # # [ 263.834190] ================================================================== [ 263.834270] BUG: KFENCE: memory corruption in fpsimd_release_task+0x28/0x50 [ 263.834270] ZA-V[ 263.834419] Corrupted memory at 0x00000000d9c0a375 [ ! ! ! ! ! ! . . . . . . . . . . ] (in kfence-#158): L-64-[ 263.834929] fpsimd_release_task+0x28/0x50 [ 263.835074] arch_release_task_struct+0x1c/0x30 [ 263.835221] __put_task_struct+0x164/0x220 [ 263.835336] delayed_put_task_struct+0x60/0x128 4: [ 263.835484] rcu_core+0x318/0x950 [ 263.835632] rcu_core_si+0x1c/0x30 [ 263.835770] __do_softirq+0x110/0x3d8 Stre[ 263.835874] run_ksoftirqd+0x40/0xe0 [ 263.835994] smpboot_thread_fn+0x1d0/0x260 [ 263.836105] kthread+0xec/0x190 [ 263.836221] ret_from_fork+0x10/0x20 [ 263.836342] ami[ 263.836393] kfence-#158: 0x00000000c8819329-0x000000009e00cc22, size=546, cache=kmalloc-1k [ 263.836393] [ 263.836527] allocated by task 1112 on cpu 5 at 252.422888s: [ 263.836697] do_sme_acc+0xa8/0x230 ng m[ 263.836821] el0_sme_acc+0x40/0xa0 [ 263.836966] el0t_64_sync_handler+0xa8/0xf0 [ 263.837114] el0t_64_sync+0x190/0x198 [ 263.837224] ode[ 263.837275] freed by task 15 on cpu 0 at 263.833793s: [ 263.837500] fpsimd_release_task+0x28/0x50 [ 263.837629] arch_release_task_struct+0x1c/0x30 ve[ 263.837773] __put_task_struct+0x164/0x220 [ 263.837886] delayed_put_task_struct+0x60/0x128 [ 263.838032] rcu_core+0x318/0x950 cto[ 263.838176] rcu_core_si+0x1c/0x30 [ 263.838310] __do_softirq+0x110/0x3d8 [ 263.838417] run_ksoftirqd+0x40/0xe0 [ 263.838521] smpboot_thread_fn+0x1d0/0x260 [ 263.838626] kthread+0xec/0x190 [ 263.838742] ret_from_fork+0x10/0x20 [ 263.838861] [ 263.838913] CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.3.3-rc1 #1 [ 263.839037] Hardware name: FVP Base RevC (DT) [ 263.839111] ================================================================== r length: 512 bits # # ZA-VL-64-4: PID: 1089 # # SSVE-VL-64-4: Streaming mode Vector length: 512 bits # # SSVE-VL-64-4: PID: 1088 # # ZA-VL-16-4: Streaming mode vector length: 128 bits # # ZA-VL-16-4: PID: 1093 # # FPSIMD-5-0: Vector length: 128 bits # # FPSIMD-5-0: PID: 1094 # # SVE-VL-32-5: Vector length: 256 bits # # SVE-VL-32-5: PID: 1096 # # SSVE-VL-64-5: Streaming mode Vector length: 512 bits # # SVE-VL-64-5: Vector length: 512 bits # # SVE-VL-64-5: PID: 1095 # # SSVE-VL-64-5: PID: 1098 # # ZA-VL-64-5:[ 263.905145] ================================================================== [ 263.905299] BUG: KFENCE: memory corruption in fpsimd_release_task+0x28/0x50 [ 263.905299] Str[ 263.905444] Corrupted memory at 0x00000000e3d2342a [ ! ! ! ! ! ! . . . . . . . . . . ] (in kfence-#146): [ 263.905957] fpsimd_release_task+0x28/0x50 eam[ 263.906088] arch_release_task_struct+0x1c/0x30 [ 263.906236] __put_task_struct+0x164/0x220 [ 263.906348] delayed_put_task_struct+0x60/0x128 [ 263.906499] rcu_core+0x318/0x950 [ 263.906647] rcu_core_si+0x1c/0x30 in[ 263.906786] __do_softirq+0x110/0x3d8 [ 263.906892] ____do_softirq+0x1c/0x30 [ 263.907015] call_on_irq_stack+0x24/0x58 g mo[ 263.907139] do_softirq_own_stack+0x28/0x40 [ 263.907305] __irq_exit_rcu+0x94/0xf8 [ 263.907454] irq_exit_rcu+0x1c/0x40 de [ 263.907599] el0_interrupt+0x58/0x160 [ 263.907765] __el0_irq_handler_common+0x18/0x28 [ 263.907879] el0t_64_irq_handler+0x10/0x20 [ 263.907989] el0t_64_irq+0x190/0x198 [ 263.908098] vect[ 263.908149] kfence-#146: 0x000000005a8569e6-0x00000000c704c501, size=546, cache=kmalloc-1k [ 263.908149] [ 263.908282] allocated by task 1102 on cpu 0 at 251.030980s: [ 263.908452] do_sme_acc+0xa8/0x230 or l[ 263.908576] el0_sme_acc+0x40/0xa0 [ 263.908725] el0t_64_sync_handler+0xa8/0xf0 [ 263.908879] el0t_64_sync+0x190/0x198 [ 263.908986] eng[ 263.909036] freed by task 1 on cpu 3 at 263.904989s: [ 263.909311] fpsimd_release_task+0x28/0x50 [ 263.909439] arch_release_task_struct+0x1c/0x30 th:[ 263.909584] __put_task_struct+0x164/0x220 [ 263.909696] delayed_put_task_struct+0x60/0x128 [ 263.909842] rcu_core+0x318/0x950 512 [ 263.909986] rcu_core_si+0x1c/0x30 [ 263.910175] __do_softirq+0x110/0x3d8 [ 263.910279] ____do_softirq+0x1c/0x30 [ 263.910399] call_on_irq_stack+0x24/0x58 [ 263.910520] do_softirq_own_stack+0x28/0x40 [ 263.910645] __irq_exit_rcu+0x94/0xf8 bits[ 263.910792] irq_exit_rcu+0x1c/0x40 [ 263.910937] el0_interrupt+0x58/0x160 [ 263.911043] __el0_irq_handler_common+0x18/0x28 [ 263.911154] el0t_64_irq_handler+0x10/0x20
[ 263.911261] el0t_64_irq+0x190/0x198 # # [ 263.911387] [ 263.911448] CPU: 3 PID: 1 Comm: systemd Tainted: G B 6.3.3-rc1 #1 [ 263.911575] Hardware name: FVP Base RevC (DT) [ 263.911653] ================================================================== ..
# ok 80 ZA-VL-16-7 # # Totals: pass:80 fail:0 xfail:0 xpass:0 skip:0 error:0 ok 32 selftests: arm64: fp-stress
Steps to reproduce: ============
# To install tuxrun on your system globally: # sudo pip3 install -U tuxrun==0.42.0 # # See https://tuxrun.org/ for complete documentation.
tuxrun \ --runtime podman \ --device fvp-aemva \ --boot-args rw \ --kernel https://storage.tuxsuite.com/public/linaro/lkft/builds/2Pq5NvLiBcWRMuy6lXftD... \ --modules https://storage.tuxsuite.com/public/linaro/lkft/builds/2Pq5NvLiBcWRMuy6lXftD... \ --rootfs https://storage.tuxboot.com/debian/bookworm/arm64/rootfs.ext4.xz \ --parameters SKIPFILE=skipfile-lkft.yaml \ --parameters KSELFTEST=https://storage.tuxsuite.com/public/linaro/lkft/builds/2Pq5NvLiBcWRMuy6lXftD... \ --image tuxrun:fvp \ --tests kselftest-arm64 \ --timeouts boot=60 kselftest-arm64=60
Test log links: ========
- https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.1.y/build/v6.1.28... - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.1.y/build/v6.1.28... - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.1.y/build/v6.1.28...
- https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.3.y/build/v6.3.2-... - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.3.y/build/v6.3.2-... - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.3.y/build/v6.3.2-...
-- Linaro LKFT https://lkft.linaro.org