------------[ cut here ]------------
WARNING: CPU: 0 PID: 776 at drivers/block/ublk_drv.c:1579 ublk_uring_cmd_cancel_fn+0x351/0x410 drivers/block/ublk_drv.c:1579
Modules linked in:
CPU: 0 UID: 0 PID: 776 Comm: kworker/u8:56 Not tainted syzkaller #0 200dea8a17c83f35b0a1e1238c384757fc17b797
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:1579
Code: 5d e9 43 2d 52 02 cc e8 1d 90 33 fe 0f 0b eb e3 e8 14 90 33 fe 0f 0b eb da e8 0b 90 33 fe 0f 0b e9 4d fe ff ff e8 ff 8f 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:ffffc9000f287990 EFLAGS: 00010293
RAX: ffffffff8353e1c1 RBX: 1ffff11027b23595 RCX: ffff888106b74c00
RDX: 0000000000000000 RSI: 000000000000003a RDI: 0000000000000104
RBP: ffffc9000f2879e0 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff8353d1a0 R12: ffff8881187d9300
R13: ffff88813d91ac80 R14: ffff8881108cc000 R15: ffff8881108cc010
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000ff7000 CR3: 000000012b0c8000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 ublk_ch_uring_cmd+0x6f/0xa0 drivers/block/ublk_drv.c:1975
 io_uring_try_cancel_uring_cmd+0x193/0x280 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+0x7f7/0x1060 kernel/workqueue.c:3354
 worker_thread+0xc99/0x13f0 kernel/workqueue.c:3435
 kthread+0x2c7/0x360 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
---[ end trace 0000000000000000 ]---