------------[ cut here ]------------
WARNING: CPU: 1 PID: 4604 at block/genhd.c:590 del_gendisk+0x70f/0x790 block/genhd.c:590
Modules linked in:
CPU: 1 PID: 4604 Comm: syz-executor.0 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:del_gendisk+0x70f/0x790 block/genhd.c:590
Code: 00 00 4c 89 f6 e8 c1 c2 fa ff 4c 89 f7 be 01 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 26 36 fd ff e8 e1 22 b3 fd <0f> 0b 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 44 89 e1 80 e1
RSP: 0018:ffffc9000337fd88 EFLAGS: 00010293
RAX: ffffffff83c4a13f RBX: 0000000000000000 RCX: ffff888023039dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888067208880 R08: dffffc0000000000 R09: fffff5200066ffb1
R10: fffff5200066ffb1 R11: 1ffff9200066ffb0 R12: ffff8880672088a0
R13: ffff888071368818 R14: ffff888023661c80 R15: ffff888067208800
FS:  00007fc1f55fa6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e964052950 CR3: 00000000233d2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 loop_remove+0x3e/0xd0 drivers/block/loop.c:2453
 loop_control_remove drivers/block/loop.c:2510 [inline]
 loop_control_ioctl+0x45f/0x550 drivers/block/loop.c:2548
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc1f6278ba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc1f55fa0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc1f6397f80 RCX: 00007fc1f6278ba9
RDX: 0000000020000280 RSI: 0000000000004c81 RDI: 0000000000000004
RBP: 00007fc1f62c447a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fc1f6397f80 R15: 00007fff01a00068
 </TASK>