[syzbot] [block?] BUG: corrupted list in blk_mq_request_bypass_insert

[syzbot <syzbot+f4353e96f7004ae5a09e@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    f1b8fa82cab7 Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=14f18379580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d1128bc53f2ef7f3
dashboard link: https://syzkaller.appspot.com/bug?extid=f4353e96f7004ae5a09e
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/932d85a2bda2/disk-f1b8fa82.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5b6b8fb76e8d/vmlinux-f1b8fa82.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c246b61ee396/Image-f1b8fa82.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f4353e96f7004ae5a09e@syzkaller.appspotmail.com

 non-slab/vmalloc memory
list_add corruption. prev->next should be next (ffff0000c8a39040), but was ffff0000c8ab0e48. (prev=ffff0000c8ab0e48).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:34!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 4390 Comm: kworker/0:1H Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Workqueue: kblockd blk_mq_requeue_work
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __list_add_valid_or_report+0x144/0x148 lib/list_debug.c:32
lr : __list_add_valid_or_report+0x144/0x148 lib/list_debug.c:32
sp : ffff8000947079f0
x29: ffff8000947079f0 x28: ffff800094707aa8 x27: ffff800094707aa0
x26: 1fffe00019147209 x25: ffff0000c8a39040 x24: ffff0000c8a39048
x23: 1fffe000191561c9 x22: dfff800000000000 x21: ffff0000c8ab0e48
x20: ffff0000c8ab0e48 x19: ffff0000c8a39040 x18: 1fffe00034bb7428
x17: 3034303933613863 x16: 3030303066666666 x15: 28207478656e2065
x14: 6220646c756f6873 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000002 x9 : d55a73c626cee600
x8 : d55a73c626cee600 x7 : ffff80008048c60c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80008049731c
x2 : 0000000100000001 x1 : ffff0000c56f3a80 x0 : 0000000000000075
Call trace:
 __list_add_valid_or_report+0x144/0x148 lib/list_debug.c:32 (P)
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add_tail include/linux/list.h:191 [inline]
 blk_mq_request_bypass_insert+0x130/0x1cc block/blk-mq.c:2551
 blk_mq_requeue_work+0x3a4/0x52c block/blk-mq.c:1560
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838
Code: 91270000 aa1303e1 aa1403e3 979c2c73 (d4210000) 
---[ end trace 0000000000000000 ]---


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