[linux-next20260923] powerpc/TM: Unexpected TM Bad Thing exception

[linux-next20260923] powerpc/TM: Unexpected TM Bad Thing exception

[Venkat Rao Bagalkote]

Hello All,

IBM CI has reported following bug on Power9 pseries lpar, while running 
powerpc/signal selftest.

This issue is reported on linux-next tree.



Traces:

[ 2111.590537] Unexpected TM Bad Thing exception at c00000000000dbac 
(msr 0x8000000302a03031) tm_scratch=800000010280b033
[ 2111.590582] Oops: Unrecoverable exception, sig: 6 [#1]
[ 2111.590592] LE PAGE_SIZE=64K MMU=Hash  SMP NR_CPUS=8192 NUMA pSeries
[ 2111.590606] Modules linked in: bonding(E) tls(E) rfkill(E) 
nft_fib_inet(E) nft_fib_ipv4(E) nft_fib_ipv6(E) nft_fib(E) 
nft_reject_inet(E) nf_reject_ipv4(E) nf_reject_ipv6(E) nft_reject(E) 
nft_ct(E) nft_chain_nat(E) hvcs(E) hvcserver(E) pseries_rng(E) 
vmx_crypto(E) sg(E) drm(E) fuse(E) drm_panel_orientation_quirks(E) 
xfs(E) nvme_tcp(E) nvme_fabrics(E) nvme_core(E) sr_mod(E) sd_mod(E) 
cdrom(E) ibmvscsi(E) ibmveth(E) scsi_transport_srp(E) dm_mirror(E) 
dm_region_hash(E) dm_log(E) dm_mod(E)
[ 2111.590749] CPU: 17 UID: 0 PID: 994879 Comm: sigfuz Tainted: G       
     E        7.3.0-rc4-next-20260923 #1 PREEMPT
[ 2111.590764] Tainted: [E]=UNSIGNED_MODULE
[ 2111.590771] Hardware name: IBM,8375-42A POWER9 (architected) 0x4e0202 
0xf000005 of:IBM,FW950.80 (VL950_131) hv:phyp pSeries
[ 2111.590783] NIP:  c00000000000dbac LR: c0000000007239b4 CTR: 
c0000000007237f0
[ 2111.590793] REGS: c00000002e6d7d60 TRAP: 0700   Tainted: G       E    
      (7.3.0-rc4-next-20260923)
[ 2111.590803] MSR:  8000000302a03031 
<SF,VEC,VSX,FP,ME,IR,DR,LE,TM[SE]>  CR: 88004445  XER: 000000cd
[ 2111.590846] CFAR: c00000000000da68 IRQMASK: 0
[ 2111.590846] PACATMSCRATCH: 800000010280b033
[ 2111.590846] GPR00: c000000000723c1c c000000039a8f410 c00000000212b200 
0000000000500cc2
[ 2111.590846] GPR04: c000000004082c60 ffffffffffffffff c000000039a8f47c 
0000000000000000
[ 2111.590846] GPR08: c000000004082c60 c0000000007237f0 c000000000723780 
6c2f7273752f006f
[ 2111.590846] GPR12: c0000000007b1310 c00000002e99b300 0000000000000000 
0000000000000000
[ 2111.590846] GPR16: 0000000000000000 0000000000000000 0000000000000000 
0000000000000003
[ 2111.590846] GPR20: 0000000000000003 0000000000000040 0000000000010000 
c000000039a8f800
[ 2111.590846] GPR24: 0000000000000000 0000000000000040 c00000029fa7de00 
c0000000471cd700
[ 2111.590846] GPR28: 0000000000500cc2 c000000039a8f47c 0000000000000000 
c000000004082c60
[ 2111.590981] NIP [c00000000000dbac] 
interrupt_return_srr_kernel+0x15c/0x18c
[ 2111.591005] LR [c0000000007239b4] alloc_pages_mpol+0x54/0x260
[ 2111.591030] Call Trace:
[ 2111.591037] [c000000039a8f450] [c000000193f76f00] 0xc000000193f76f00
[ 2111.591053] [c000000039a8f4b0] [c000000000723c1c] 
alloc_pages_noprof+0x5c/0xf0
[ 2111.591070] [c000000039a8f4d0] [c0000000007b118c] 
anon_pipe_prefill_and_lock+0x8c/0x210
[ 2111.591086] [c000000039a8f570] [c0000000007b138c] 
anon_pipe_write+0x7c/0x810
[ 2111.591099] [c000000039a8f640] [c00000000079f138] 
__kernel_write_iter+0x128/0x300
[ 2111.591114] [c000000039a8f6c0] [c000000000874638] __dump_emit+0x128/0x250
[ 2111.591130] [c000000039a8f7a0] [c00000000086aa44] 
elf_core_dump+0x244/0x5c0
[ 2111.591145] [c000000039a8f9b0] [c000000000874b50] 
coredump_write+0xd0/0x470
[ 2111.591160] [c000000039a8fa40] [c000000000874fb0] 
do_coredump.constprop.0+0xc0/0x4e0
[ 2111.591175] [c000000039a8fb20] [c000000000875580] 
vfs_coredump+0x1b0/0x300
[ 2111.591188] [c000000039a8fc30] [c000000000256408] get_signal+0x918/0xad0
[ 2111.591209] [c000000039a8fd20] [c000000000021d48] do_signal+0x78/0x330
[ 2111.591226] [c000000039a8fdc0] [c0000000015125a8] 
irqentry_exit+0x358/0x990
[ 2111.591240] [c000000039a8fe20] [c00000000002f714] 
program_check_exception+0xd4/0x100
[ 2111.591253] [c000000039a8fe50] [c000000000009b2c] 
program_check_common_virt+0x3bc/0x3c0
[ 2111.591267] ---- interrupt: 700 at 0x10001e8c
[ 2111.591276] NIP:  0000000010001e8c LR: 0000000010001e74 CTR: 
00007fffb4400590
[ 2111.591286] REGS: c000000039a8fe80 TRAP: 0700   Tainted: G       E    
      (7.3.0-rc4-next-20260923)
[ 2111.591296] MSR:  8000000302a0f033 
<SF,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE,TM[SE]>  CR: 22004442 XER: 000000cd
[ 2111.591337] CFAR: 00007fffb44005bc IRQMASK: 0
[ 2111.591337] PACATMSCRATCH: 800000010280b033
[ 2111.591337] GPR00: 0000000010001e74 00007fffb43ad3c0 0000000010027f00 
00000000415e6618
[ 2111.591337] GPR04: 00007fffb43ad384 00007fffb45f004c 00007fffb45f0090 
00007fffb45f0048
[ 2111.591337] GPR08: 0000000082bccc31 00000000415e6618 0000000000000000 
00000000415e6618
[ 2111.591337] GPR12: 00007fffb4400590 00007fffb43b68e0 0000000000000000 
00007fffb43af1e0
[ 2111.591337] GPR16: 0000000000000000 00007fffb43af8e0 0000000000000720 
0000000000000000
[ 2111.591337] GPR20: 0000000000000000 00007fffb46f0000 000000000080e9e0 
00007fffb3ba0000
[ 2111.591337] GPR24: 0000000000000001 00007fffd8d5ecb0 0000000000000000 
00007fffb43ae8f8
[ 2111.591337] GPR28: 000000000000000a 0000000000000000 00000000100201bc 
00000000000f2e3f
[ 2111.591475] NIP [0000000010001e8c] 0x10001e8c
[ 2111.591484] LR [0000000010001e74] 0x10001e74
[ 2111.591492] ---- interrupt: 700
[ 2111.591499] Code: 7c8903a6 7ca103a6 f8010020 e8410040 e8610048 
e8810050 e8a10058 40c6001c 7ccff120 e8c10060 e8010030 e8210038 
<4c000024> 48000000 7ccff120 f92d0080
[ 2111.591549] ---[ end trace 0000000000000000 ]---


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

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


Regards,

Venkat.