syzbot

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WARNING: CPU: 0 PID: 3498 at block/genhd.c:589 del_gendisk+0x703/0x780
Modules linked in:
CPU: 0 PID: 3498 Comm: syz-executor422 Not tainted 5.15.143-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:del_gendisk+0x703/0x780 block/genhd.c:589
Code: 00 00 4c 89 f6 e8 4d 88 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 b2 15 fd ff e8 0d c8 8f fd <0f> 0b 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 89 e9 80 e1 07
RSP: 0018:ffffc90002db7df0 EFLAGS: 00010293
RAX: ffffffff83f06033 RBX: 0000000000000240 RCX: ffff888079f99dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff83f05a48 R09: fffff520005b6fb9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100eb1c710
R13: ffff8880758e3800 R14: ffff88801d9be3c0 R15: ffff8880758e3880
FS:  0000555555803380(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f583819000 CR3: 0000000022515000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 loop_remove drivers/block/loop.c:2452 [inline]
 loop_control_remove drivers/block/loop.c:2509 [inline]
 loop_control_ioctl+0x552/0x700 drivers/block/loop.c:2547
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fa39e3a93e9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffef7f2c788 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffef7f2c958 RCX: 00007fa39e3a93e9
RDX: 0000000020000280 RSI: 0000000000004c81 RDI: 0000000000000004
RBP: 00007fa39e41c610 R08: 00007ffef7f2c958 R09: 00007ffef7f2c958
R10: 00007ffef7f2c958 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffef7f2c948 R14: 0000000000000001 R15: 0000000000000001
 </TASK>