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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   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   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 Regards, Venkat.