------------[ cut here ]------------
WARNING: CPU: 1 PID: 867 at drivers/block/ublk_drv.c:1583 ublk_uring_cmd_cancel_fn+0x351/0x410 drivers/block/ublk_drv.c:1583
Modules linked in:
CPU: 1 UID: 0 PID: 867 Comm: kworker/u8:60 Not tainted syzkaller #0 2db523747cf1beec8353ecf3fbcf651dac8dc83d
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: iou_exit io_ring_exit_work
RIP: 0010:ublk_uring_cmd_cancel_fn+0x351/0x410 drivers/block/ublk_drv.c:1583
Code: 5d e9 93 3c 53 02 cc e8 5d 05 33 fe 0f 0b eb e3 e8 54 05 33 fe 0f 0b eb da e8 4b 05 33 fe 0f 0b e9 4d fe ff ff e8 3f 05 33 fe <0f> 0b eb c5 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c 0a fd ff ff 4c 89
RSP: 0018:ffffc9000fec7990 EFLAGS: 00010293
RAX: ffffffff83547531 RBX: 1ffff11023931b95 RCX: ffff88811548cc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000104
RBP: ffffc9000fec79e0 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff83546510 R12: ffff888110eb3900
R13: ffff88811c98dc80 R14: ffff88810d3cc000 R15: ffff88810d3cc010
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd90c53010 CR3: 0000000102bc2000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 ublk_ch_uring_cmd+0x6f/0xa0 drivers/block/ublk_drv.c:1979
 io_uring_try_cancel_uring_cmd+0x196/0x280 io_uring/uring_cmd.c:68
 io_uring_try_cancel_requests+0x4d6/0x5b5 io_uring/io_uring.c:3185
 io_ring_exit_work+0x23d/0x83b io_uring/io_uring.c:2971
 process_one_work kernel/workqueue.c:3273 [inline]
 process_scheduled_works+0x7f4/0x1060 kernel/workqueue.c:3354
 worker_thread+0xc99/0x13f0 kernel/workqueue.c:3435
 kthread+0x2c4/0x360 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
---[ end trace 0000000000000000 ]---