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

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Message-ID: <8315ad38-2727-4ffa-8c72-d0c492ad6a74@linux.ibm.com>
Date: Thu, 13 Feb 2025 11:38:47 +0530
From: Sourabh Jain <sourabhjain@...ux.ibm.com>
To: Venkat Rao Bagalkote <venkat88@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-ext4@...r.kernel.org, fstests@...r.kernel.org
Subject: Re: [next-20250212] FStests generic/451 on EXT4 FS resulting in
 kernel OOPs

Hello Venkat,

Thanks for reporting the issue.

I noticed that system rebooted after kernel panic.

Just wondering did you configured kdump/fadump?

Thanks,
Sourabh Jain


On 13/02/25 11:21, Venkat Rao Bagalkote wrote:
> 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.
>
>