linux-kernel - [next-20250212] FStests generic/451 on EXT4 FS resulting in kernel OOPs

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Message-ID: <6f43bd29-d72b-4a39-b931-7b1b47c7cc06@linux.vnet.ibm.com>
Date: Thu, 13 Feb 2025 11:21:22 +0530
From: Venkat Rao Bagalkote <venkat88@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-ext4@...r.kernel.org, fstests@...r.kernel.org
Subject: [next-20250212] FStests generic/451 on EXT4 FS resulting in kernel
 OOPs

Greetings!!!


I am observing kernel OOPs, while running FStests generic/451 on EXT4 
with linux-next kernel(next-20250212) on IBM Power Servers.


Issue is seen on: next-20250212

Issue not seen on: next-20250210


Traces:

[ 2977.768678] run fstests generic/451 at 2025-02-12 16:42:14
[ 3001.242006] list_add double add: new=c00000000e2398c8, 
prev=c00000000e2398c8, next=c0000000c1f2f0b8.
[ 3001.242047] ------------[ cut here ]------------
[ 3001.242052] kernel BUG at lib/list_debug.c:35!
[ 3001.242059] Oops: Exception in kernel mode, sig: 5 [#1]
[ 3001.242065] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=8192 NUMA pSeries
[ 3001.242072] Modules linked in: overlay dm_zero dm_thin_pool 
dm_persistent_data dm_bio_prison dm_snapshot dm_bufio dm_flakey ext4 
mbcache jbd2 loop dm_mod 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 nf_defrag_ipv6 nf_defrag_ipv4 
tls ip_set rfkill nf_tables nfnetlink pseries_rng aes_gcm_p10_crypto 
crypto_simd vmx_crypto xfs sr_mod sd_mod cdrom sg ibmvscsi ibmveth 
scsi_transport_srp fuse [last unloaded: scsi_debug]
[ 3001.242165] CPU: 26 UID: 0 PID: 894003 Comm: kworker/u228:17 Not 
tainted 6.14.0-rc2-next-20250212 #1
[ 3001.242174] Hardware name: IBM,8375-42A POWER9 (architected) 0x4e0202 
0xf000005 of:IBM,FW950.80 (VL950_131) hv:phyp pSeries
[ 3001.242183] Workqueue: loop0 loop_workfn [loop]
[ 3001.242194] NIP:  c00000000090d528 LR: c00000000090d524 CTR: 
00000000007088ec
[ 3001.242201] REGS: c0000000e5adfa70 TRAP: 0700   Not tainted 
(6.14.0-rc2-next-20250212)
[ 3001.242208] MSR:  800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>  
CR: 2800024f  XER: 00000009
[ 3001.242229] CFAR: c000000000224238 IRQMASK: 1
[ 3001.242229] GPR00: c00000000090d524 c0000000e5adfd10 c000000001657500 
0000000000000058
[ 3001.242229] GPR04: c000001179a87c88 c000001179a96000 c0000000e5adfb58 
0000001177810000
[ 3001.242229] GPR08: 0000000000000027 0000000000000000 0000000000000000 
0000000000000001
[ 3001.242229] GPR12: c000000002a49cd0 c00000000f75ff00 c0000000001abf00 
c0000000fda72fc0
[ 3001.242229] GPR16: 0000000000000000 0000000000000000 0000000000000000 
0000000000000000
[ 3001.242229] GPR20: c000000007acbc00 0000000004208060 c00000000e239880 
fffffffffffffef7
[ 3001.242229] GPR24: 0000000000000402 c0000000924b8fc0 c0000000c1f2f07c 
c0000000c1f2f000
[ 3001.242229] GPR28: c0000000c1f2f0b8 c00000000e2398c8 c00000000e2398c8 
c0000000c1f2f0b8
[ 3001.242309] NIP [c00000000090d528] __list_add_valid_or_report+0x158/0x15c
[ 3001.242318] LR [c00000000090d524] __list_add_valid_or_report+0x154/0x15c
[ 3001.242324] Call Trace:
[ 3001.242327] [c0000000e5adfd10] [c00000000090d524] 
__list_add_valid_or_report+0x154/0x15c (unreliable)
[ 3001.242336] [c0000000e5adfd90] [c0080000073c359c] 
loop_process_work+0x594/0x630 [loop]
[ 3001.242344] [c0000000e5adfe40] [c00000000019dc5c] 
process_one_work+0x1fc/0x4bc
[ 3001.242354] [c0000000e5adfef0] [c00000000019ebec] 
worker_thread+0x344/0x508
[ 3001.242362] [c0000000e5adff90] [c0000000001ac024] kthread+0x12c/0x14c
[ 3001.242370] [c0000000e5adffe0] [c00000000000df98] 
start_kernel_thread+0x14/0x18
[ 3001.242377] Code: 4b916cf9 60000000 0fe00000 7c0802a6 7c641b78 
3c62ffe5 7fe6fb78 7fc5f378 386343a0 f8010090 4b916cd1 60000000 
<0fe00000> 3c4c00d5 38429fd4 fbe1fff8
[ 3001.242407] ---[ end trace 0000000000000000 ]---
[ 3001.284444] pstore: backend (nvram) writing error (-1)
[ 3001.284452]
[ 3002.284455] Kernel panic - not syncing: Fatal exception
[ 3002.431023] Rebooting in 10 seconds..


Regards,

Venkat.