linux-kernel - [mainline] Kernel OOPs while running powerpc/mce/ selftest

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Message-ID: <4b107285-57d7-482d-9fdf-8499e5fdbebb@linux.ibm.com>
Date: Thu, 23 Oct 2025 10:24:54 +0530
From: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
To: linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Madhavan Srinivasan <maddy@...ux.ibm.com>
Subject: [mainline] Kernel OOPs while running powerpc/mce/ selftest

Greetings!!!


IBM CI has reported a kernel crash while running mce selftests on 
mainline kernel, from tools/testing/selftests/powerpc/mce/.


This issue is hit when CONFIG_KASAN is enabled. If its disabled, test 
passes.


Traces:


[ 8041.225432] BUG: Unable to handle kernel data access on read at 
0xc00e0001a1ad6103
[ 8041.225453] Faulting instruction address: 0xc0000000008c54d8
[ 8041.225461] Oops: Kernel access of bad area, sig: 11 [#1]
[ 8041.225467] LE PAGE_SIZE=64K MMU=Radix  SMP NR_CPUS=8192 NUMA pSeries
[ 8041.225475] Modules linked in: nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 
nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct 
nft_chain_nat nf_nat nf_conntrack bonding tls nf_defrag_ipv6 
nf_defrag_ipv4 rfkill ip_set nf_tables nfnetlink pseries_rng vmx_crypto 
dax_pmem fuse ext4 crc16 mbcache jbd2 nd_pmem papr_scm sd_mod libnvdimm 
sg ibmvscsi ibmveth scsi_transport_srp pseries_wdt
[ 8041.225558] CPU: 17 UID: 0 PID: 877869 Comm: inject-ra-err Kdump: 
loaded Not tainted 6.18.0-rc2+ #1 VOLUNTARY
[ 8041.225569] Hardware name: IBM,9080-HEX Power11 (architected) 
0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
[ 8041.225576] NIP:  c0000000008c54d8 LR: c00000000004e464 CTR: 
0000000000000000
[ 8041.225583] REGS: c0000000fff778d0 TRAP: 0300   Not tainted (6.18.0-rc2+)
[ 8041.225590] MSR:  8000000000001003 <SF,ME,RI,LE>  CR: 48002828  XER: 
00000000
[ 8041.225607] CFAR: c00000000004e460 DAR: c00e0001a1ad6103 DSISR: 
40000000 IRQMASK: 3
[ 8041.225607] GPR00: c0000000019d0598 c0000000fff77b70 c00000000244a400 
c000000d0d6b0818
[ 8041.225607] GPR04: 0000000000004d43 0000000000000008 c00000000004e464 
004d424900000000
[ 8041.225607] GPR08: 0000000000000001 18000001a1ad6103 a80e000000000000 
0000000003000048
[ 8041.225607] GPR12: 0000000000000000 c000000d0ddf3300 0000000000000000 
0000000000000000
[ 8041.225607] GPR16: 0000000000000000 0000000000000000 0000000000000000 
0000000000000000
[ 8041.225607] GPR20: 0000000000000000 0000000000000000 0000000000000000 
0000000000000000
[ 8041.225607] GPR24: 0000000000000000 0000000000000000 0000000000000000 
0000000000000000
[ 8041.225607] GPR28: c000000d0d6b0888 c000000d0d6b0800 0000000000004d43 
c000000d0d6b0818
[ 8041.225701] NIP [c0000000008c54d8] __asan_load2+0x54/0xd8
[ 8041.225712] LR [c00000000004e464] pseries_errorlog_id+0x20/0x3c
[ 8041.225722] Call Trace:
[ 8041.225726] [c0000000fff77b90] [c0000000001f8748] 
fwnmi_get_errinfo+0xd4/0x104
[ 8041.225738] [c0000000fff77bc0] [c0000000019d0598] 
get_pseries_errorlog+0xa8/0x110
[ 8041.225750] [c0000000fff77c00] [c0000000001f8f68] 
pseries_machine_check_realmode+0x11c/0x214
[ 8041.225762] [c0000000fff77ce0] [c000000000049ca4] 
machine_check_early+0x74/0xc0
[ 8041.225771] [c0000000fff77d30] [c0000000000084a4] 
machine_check_early_common+0x1b4/0x2c0
[ 8041.225782] ---- interrupt: 200 at 0x100105cc
[ 8041.225788] NIP:  00000000100105cc LR: 00000000100105c4 CTR: 
0000000000000000
[ 8041.225795] REGS: c0000000fff77d60 TRAP: 0200   Not tainted (6.18.0-rc2+)
[ 8041.225801] MSR:  8000000002a0f033 
<SF,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE>  CR: 84002822  XER: 00000000
[ 8041.225829] CFAR: 000000000000021c DAR: 00007fffa0a40000 DSISR: 
02000008 IRQMASK: 0
[ 8041.225829] GPR00: 00000000100105c4 00007fffdaa5bd20 0000000010047f00 
00007fffa0a40000
[ 8041.225829] GPR04: 0000000000001000 0000000000000003 0000000000000001 
0000000000000005
[ 8041.225829] GPR08: 0000000000000000 fffffffffffff000 0000000000000000 
0000000000000000
[ 8041.225829] GPR12: 0000000000000000 00007fffa0b3ad20 0000000000000000 
0000000000000000
[ 8041.225829] GPR16: 0000000000000000 0000000000000000 0000000000000000 
0000000000000000
[ 8041.225829] GPR20: 0000000000000000 0000000000000000 0000000000000000 
00000000100102c0
[ 8041.225829] GPR24: 00007fffa0b30000 00007fffa0b2f6c0 00007fffdaa5c408 
000000001003fce8
[ 8041.225829] GPR28: 00007fffdaa5c658 0000000000000001 0000000000000005 
0000000000000000
[ 8041.225919] NIP [00000000100105cc] 0x100105cc
[ 8041.225925] LR [00000000100105c4] 0x100105c4
[ 8041.225930] ---- interrupt: 200
[ 8041.225934] Code: 6129ffff 792907c6 6529ffff 6129ffff 7c234840 
40810058 39230001 3d40a80e 71280007 41820034 7929e8c2 794a07c6 
<7d2950ae> 7d290775 40820070 38210020
[ 8041.225969] ---[ end trace 0000000000000000 ]---



If you happen to fix this issue, please add below tag.


Reported-by: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>



Regards,

Venkat.