[v6.1] WARNING in io_req_complete_failed

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 7eaef76fbc46 Linux 6.1.20
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17cb90a6c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=28c36fe4d02f8c88
dashboard link: https://syzkaller.appspot.com/bug?extid=61712a06f708f289dfdf
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/610a00ba4375/disk-7eaef76f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/57c1310f9a30/vmlinux-7eaef76f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/81999f717d3b/bzImage-7eaef76f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+61712a...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5256 at io_uring/io_uring.c:872 io_req_complete_failed+0x1d7/0x290
Modules linked in:
CPU: 0 PID: 5256 Comm: kworker/0:12 Not tainted 6.1.20-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events io_fallback_req_func
RIP: 0010:io_req_complete_failed+0x1d7/0x290 io_uring/io_uring.c:872
Code: 6f 58 fd 4c 89 f7 ff d3 eb 05 e8 e4 6f 58 fd 4c 89 f7 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 ae ea ff ff e8 c9 6f 58 fd <0f> 0b e9 d9 fe ff ff 89 e9 80 e1 07 38 c1 0f 8c 4d fe ff ff 48 89
RSP: 0018:ffffc90003657b60 EFLAGS: 00010293
RAX: ffffffff8431f157 RBX: ffff888085e36e50 RCX: ffff8880772f3a80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8431f023 R09: ffffffff84356978
R10: 0000000000000003 R11: ffff8880772f3a80 R12: 00000000ffffff83
R13: ffff888085e36dc0 R14: ffff888085e36dc0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7908d85058 CR3: 000000001f40d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
io_fallback_req_func+0x10f/0x1fe io_uring/io_uring.c:250
process_one_work+0x909/0x1380 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x268/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>


---
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[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 7eaef76fbc46 Linux 6.1.20
git tree: linux-6.1.y

console output: https://syzkaller.appspot.com/x/log.txt?x=126d82bac80000

kernel config: https://syzkaller.appspot.com/x/.config?x=28c36fe4d02f8c88
dashboard link: https://syzkaller.appspot.com/bug?extid=61712a06f708f289dfdf
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=101b6d9ec80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1279ba9ac80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/610a00ba4375/disk-7eaef76f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/57c1310f9a30/vmlinux-7eaef76f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/81999f717d3b/bzImage-7eaef76f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+61712a...@syzkaller.appspotmail.com

------------[ cut here ]------------

WARNING: CPU: 0 PID: 14 at io_uring/io_uring.c:872 io_req_complete_failed+0x1d7/0x290
Modules linked in:
CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 6.1.20-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events io_fallback_req_func

RIP: 0010:io_req_complete_failed+0x1d7/0x290 io_uring/io_uring.c:872
Code: 6f 58 fd 4c 89 f7 ff d3 eb 05 e8 e4 6f 58 fd 4c 89 f7 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 ae ea ff ff e8 c9 6f 58 fd <0f> 0b e9 d9 fe ff ff 89 e9 80 e1 07 38 c1 0f 8c 4d fe ff ff 48 89

RSP: 0018:ffffc90000137b60 EFLAGS: 00010293
RAX: ffffffff8431f157 RBX: ffff88802759a950 RCX: ffff88813fe69d40

RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8431f023 R09: ffffffff84356978

R10: 0000000000000003 R11: ffff88813fe69d40 R12: 00000000ffffff83
R13: ffff88802759a8c0 R14: ffff88802759a8c0 R15: dffffc0000000000

FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007ffd1c2e5ff8 CR3: 0000000022983000 CR4: 00000000003506f0