* [BUG] powerpc/bpf: Kernel stack corruption in avc_has_perm() during BPF kselftests (test_progs)
@ 2026-09-16 8:41 Venkat Rao Bagalkote
2026-09-16 8:52 ` Shrikanth Hegde
0 siblings, 1 reply; 3+ messages in thread
From: Venkat Rao Bagalkote @ 2026-09-16 8:41 UTC (permalink / raw)
To: Hari Bathini, Saket Kumar Bhaskar, bpf, linuxppc-dev,
Kumar Kartikeya Dwivedi, Daniel Borkmann, Eduard Zingerman,
yonghong.song, Alexei Starovoitov, andrii, Madhavan Srinivasan,
Ritesh Harjani, Shrikanth Hegde
Cc: LKML
Hello All!!!
IBM CI has reported a kernel panic on PowerPC (ppc64le, POWER9 pSeries
guest) while running BPF kselftests (test_progs).
Environment:
Kernel version: 7.3.0-rc3-gf6e7b42bf05b (PREEMPT)
Architecture: ppc64le (POWER9 - IBM,8375-42A pSeries / phyp)
Test Suite: Avocado FVT / kselftests
(tools/testing/selftests/bpf/test_progs)
Traces:
[ 1359.516833] Kernel panic - not syncing: stack-protector: Kernel stack
is corrupted in: avc_has_perm+0x23c/0x240
[ 1359.516856] CPU: 0 UID: 0 PID: 49806 Comm: test_progs Tainted: G
OE K 7.3.0-rc3-gf6e7b42bf05b #1 PREEMPT
[ 1359.516866] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE, [K]=LIVEPATCH
[ 1359.516870] Hardware name: IBM,8375-42A POWER9 (architected) 0x4e0202
0xf000005 of:IBM,FW950.80 (VL950_131) hv:phyp pSeries
[ 1359.516876] Call Trace:
[ 1359.516880] [c00000011bc67b10] [c0000000014627c0]
dump_stack_lvl+0x84/0xc0 (unreliable)
[ 1359.516890] [c00000011bc67b40] [c000000000234840] vpanic+0x1b4/0x47c
[ 1359.516897] [c00000011bc67be0] [c000000000234b44]
do_panic_on_target_cpu+0x0/0x2c
[ 1359.516906] [c00000011bc67c00] [c0000000014f8ce8]
__stack_chk_fail+0x48/0x60
[ 1359.516913] [c00000011bc67c70] [c00000000092f0bc]
avc_has_perm+0x23c/0x240
[ 1359.516920] [c00000011bc67d40] [c000000000936fc0]
selinux_task_getpgid+0x80/0xa0
[ 1359.516927] [c00000011bc67d80] [c000000000920190]
security_task_getpgid+0x70/0x1c0
[ 1359.516934] [c00000011bc67db0] [c000000000259488] do_getpgid+0xa8/0xf0
[ 1359.516941] [c00000011bc67de0] [c0000000002594f0] sys_getpgid+0x20/0x30
[ 1359.516948] [c00000011bc67e00] [c000000000034670]
system_call_exception+0x160/0x480
[ 1359.516957] [c00000011bc67e50] [c00000000000d05c]
system_call_vectored_common+0x15c/0x2ec
Please let us know if any further debugging or testing with specific BPF
JIT options is needed.
Regards,
Venkat.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [BUG] powerpc/bpf: Kernel stack corruption in avc_has_perm() during BPF kselftests (test_progs)
2026-09-16 8:41 [BUG] powerpc/bpf: Kernel stack corruption in avc_has_perm() during BPF kselftests (test_progs) Venkat Rao Bagalkote
@ 2026-09-16 8:52 ` Shrikanth Hegde
2026-09-16 10:33 ` Venkat Rao Bagalkote
0 siblings, 1 reply; 3+ messages in thread
From: Shrikanth Hegde @ 2026-09-16 8:52 UTC (permalink / raw)
To: Venkat Rao Bagalkote, Hari Bathini, Saket Kumar Bhaskar, bpf,
linuxppc-dev, Kumar Kartikeya Dwivedi, Daniel Borkmann,
Eduard Zingerman, yonghong.song, Alexei Starovoitov, andrii,
Madhavan Srinivasan, Ritesh Harjani
Cc: LKML
Hi Venkat.
Thanks for reporting.
On 9/16/26 2:11 PM, Venkat Rao Bagalkote wrote:
> Hello All!!!
>
>
> IBM CI has reported a kernel panic on PowerPC (ppc64le, POWER9 pSeries guest) while running BPF kselftests (test_progs).
>
What has changed in CI that it is hitting now?
> Environment:
>
It is very likely same as
https://lore.kernel.org/all/ba9759d0-b1f2-4b33-aff5-769cf89bd584@linux.ibm.com/
>
> Kernel version: 7.3.0-rc3-gf6e7b42bf05b (PREEMPT)
> Architecture: ppc64le (POWER9 - IBM,8375-42A pSeries / phyp)
> Test Suite: Avocado FVT / kselftests (tools/testing/selftests/bpf/test_progs)
>
>
> Traces:
>
> [ 1359.516833] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: avc_has_perm+0x23c/0x240
> [ 1359.516856] CPU: 0 UID: 0 PID: 49806 Comm: test_progs Tainted: G OE K 7.3.0-rc3-gf6e7b42bf05b #1 PREEMPT
> [ 1359.516866] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE, [K]=LIVEPATCH
> [ 1359.516870] Hardware name: IBM,8375-42A POWER9 (architected) 0x4e0202 0xf000005 of:IBM,FW950.80 (VL950_131) hv:phyp pSeries
> [ 1359.516876] Call Trace:
> [ 1359.516880] [c00000011bc67b10] [c0000000014627c0] dump_stack_lvl+0x84/0xc0 (unreliable)
> [ 1359.516890] [c00000011bc67b40] [c000000000234840] vpanic+0x1b4/0x47c
> [ 1359.516897] [c00000011bc67be0] [c000000000234b44] do_panic_on_target_cpu+0x0/0x2c
> [ 1359.516906] [c00000011bc67c00] [c0000000014f8ce8] __stack_chk_fail+0x48/0x60
> [ 1359.516913] [c00000011bc67c70] [c00000000092f0bc] avc_has_perm+0x23c/0x240
> [ 1359.516920] [c00000011bc67d40] [c000000000936fc0] selinux_task_getpgid+0x80/0xa0
> [ 1359.516927] [c00000011bc67d80] [c000000000920190] security_task_getpgid+0x70/0x1c0
> [ 1359.516934] [c00000011bc67db0] [c000000000259488] do_getpgid+0xa8/0xf0
> [ 1359.516941] [c00000011bc67de0] [c0000000002594f0] sys_getpgid+0x20/0x30
> [ 1359.516948] [c00000011bc67e00] [c000000000034670] system_call_exception+0x160/0x480
> [ 1359.516957] [c00000011bc67e50] [c00000000000d05c] system_call_vectored_common+0x15c/0x2ec
>
>
> Please let us know if any further debugging or testing with specific BPF JIT options is needed.
>
>
> Regards,
>
> Venkat.
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [BUG] powerpc/bpf: Kernel stack corruption in avc_has_perm() during BPF kselftests (test_progs)
2026-09-16 8:52 ` Shrikanth Hegde
@ 2026-09-16 10:33 ` Venkat Rao Bagalkote
0 siblings, 0 replies; 3+ messages in thread
From: Venkat Rao Bagalkote @ 2026-09-16 10:33 UTC (permalink / raw)
To: Shrikanth Hegde, Hari Bathini, Saket Kumar Bhaskar, bpf,
linuxppc-dev, Kumar Kartikeya Dwivedi, Daniel Borkmann,
Eduard Zingerman, yonghong.song, Alexei Starovoitov, andrii,
Madhavan Srinivasan, Ritesh Harjani
Cc: LKML
On 16/09/26 2:22 pm, Shrikanth Hegde wrote:
> Hi Venkat.
>
> Thanks for reporting.
>
> On 9/16/26 2:11 PM, Venkat Rao Bagalkote wrote:
>> Hello All!!!
>>
>>
>> IBM CI has reported a kernel panic on PowerPC (ppc64le, POWER9
>> pSeries guest) while running BPF kselftests (test_progs).
>>
>
> What has changed in CI that it is hitting now?
Nothings in specific. Its just that, some of the tests were not run for
some time, due to build and other issues.
>
>> Environment:
>>
>
> It is very likely same as
> https://lore.kernel.org/all/ba9759d0-b1f2-4b33-aff5-769cf89bd584@linux.ibm.com/
>
>
>>
>> Kernel version: 7.3.0-rc3-gf6e7b42bf05b (PREEMPT)
>> Architecture: ppc64le (POWER9 - IBM,8375-42A pSeries / phyp)
>> Test Suite: Avocado FVT / kselftests
>> (tools/testing/selftests/bpf/test_progs)
>>
>>
>> Traces:
>>
>> [ 1359.516833] Kernel panic - not syncing: stack-protector: Kernel
>> stack is corrupted in: avc_has_perm+0x23c/0x240
>> [ 1359.516856] CPU: 0 UID: 0 PID: 49806 Comm: test_progs Tainted: G
>> OE K 7.3.0-rc3-gf6e7b42bf05b #1 PREEMPT
>> [ 1359.516866] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE,
>> [K]=LIVEPATCH
>> [ 1359.516870] Hardware name: IBM,8375-42A POWER9 (architected)
>> 0x4e0202 0xf000005 of:IBM,FW950.80 (VL950_131) hv:phyp pSeries
>> [ 1359.516876] Call Trace:
>> [ 1359.516880] [c00000011bc67b10] [c0000000014627c0]
>> dump_stack_lvl+0x84/0xc0 (unreliable)
>> [ 1359.516890] [c00000011bc67b40] [c000000000234840] vpanic+0x1b4/0x47c
>> [ 1359.516897] [c00000011bc67be0] [c000000000234b44]
>> do_panic_on_target_cpu+0x0/0x2c
>> [ 1359.516906] [c00000011bc67c00] [c0000000014f8ce8]
>> __stack_chk_fail+0x48/0x60
>> [ 1359.516913] [c00000011bc67c70] [c00000000092f0bc]
>> avc_has_perm+0x23c/0x240
>> [ 1359.516920] [c00000011bc67d40] [c000000000936fc0]
>> selinux_task_getpgid+0x80/0xa0
>> [ 1359.516927] [c00000011bc67d80] [c000000000920190]
>> security_task_getpgid+0x70/0x1c0
>> [ 1359.516934] [c00000011bc67db0] [c000000000259488]
>> do_getpgid+0xa8/0xf0
>> [ 1359.516941] [c00000011bc67de0] [c0000000002594f0]
>> sys_getpgid+0x20/0x30
>> [ 1359.516948] [c00000011bc67e00] [c000000000034670]
>> system_call_exception+0x160/0x480
>> [ 1359.516957] [c00000011bc67e50] [c00000000000d05c]
>> system_call_vectored_common+0x15c/0x2ec
>>
>>
>> Please let us know if any further debugging or testing with specific
>> BPF JIT options is needed.
>>
>>
>> Regards,
>>
>> Venkat.
>>
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-09-16 10:33 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2026-09-16 8:41 [BUG] powerpc/bpf: Kernel stack corruption in avc_has_perm() during BPF kselftests (test_progs) Venkat Rao Bagalkote
2026-09-16 8:52 ` Shrikanth Hegde
2026-09-16 10:33 ` Venkat Rao Bagalkote
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