------------[ cut here ]------------
WARNING: CPU: 0 PID: 13 at drivers/block/ublk_drv.c:1579 ublk_uring_cmd_cancel_fn+0x34f/0x410 drivers/block/ublk_drv.c:1579
Modules linked in:
CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: iou_exit io_ring_exit_work
RIP: 0010:ublk_uring_cmd_cancel_fn+0x34f/0x410 drivers/block/ublk_drv.c:1579
Code: 5d e9 c5 46 55 02 cc e8 0f 14 32 fe 0f 0b eb e3 e8 06 14 32 fe 0f 0b eb da e8 fd 13 32 fe 0f 0b e9 4d fe ff ff e8 f1 13 32 fe <0f> 0b eb c5 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c 0c fd ff ff 4c 89
RSP: 0018:ffffc900000d7990 EFLAGS: 00010293
RAX: ffffffff8355adbf RBX: 1ffff11022804ecd RCX: ffff888103652600
RDX: 0000000000000000 RSI: 000000000000020a RDI: 0000000000000347
RBP: ffffc900000d79e0 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff83559da0 R12: ffff888107b60000
R13: ffff888114027640 R14: ffff888113850000 R15: ffff888113850010
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8300000001 CR3: 00000000074aa000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 ublk_ch_uring_cmd+0x6f/0xa0 drivers/block/ublk_drv.c:1975
 io_uring_try_cancel_uring_cmd+0x19e/0x280 io_uring/uring_cmd.c:68
 io_uring_try_cancel_requests+0x4ce/0x5a5 io_uring/io_uring.c:3185
 io_ring_exit_work+0x23c/0x83b io_uring/io_uring.c:2971
 process_one_work kernel/workqueue.c:3261 [inline]
 process_scheduled_works+0x7d4/0x1020 kernel/workqueue.c:3342
 worker_thread+0xc51/0x1370 kernel/workqueue.c:3423
 kthread+0x2c9/0x370 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 ]---