VFS: Busy inodes after unmount of loop2 (iso9660)
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kernel BUG at fs/super.c:505!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4275 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:generic_shutdown_super+0x334/0x340 fs/super.c:503
Code: e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 e5 92 f1 ff 49 8b 16 48 81 c3 a8 06 00 00 48 c7 c7 60 4f 99 8a 48 89 de e8 6c 1c 2d 08 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 53 48 89 fb 49
RSP: 0018:ffffc90004147d18 EFLAGS: 00010246
RAX: 0000000000000031 RBX: ffff8880270926a8 RCX: fbe952512bddee00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffff11004e124fb R08: dffffc0000000000 R09: fffff52000828f45
R10: fffff52000828f45 R11: 1ffff92000828f44 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8cd13aa0 R15: ffff8880270927d8
FS:  00005555854ec500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f806a04f723 CR3: 000000005ba06000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1182
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2a469901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc68b050a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f2a46a11d7d RCX: 00007f2a469901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc68b05160
RBP: 00007ffc68b05160 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc68b061f0
R13: 00007f2a46a11d7d R14: 0000000000023d8e R15: 00007ffc68b06230
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:generic_shutdown_super+0x334/0x340 fs/super.c:503
Code: e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 e5 92 f1 ff 49 8b 16 48 81 c3 a8 06 00 00 48 c7 c7 60 4f 99 8a 48 89 de e8 6c 1c 2d 08 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 53 48 89 fb 49
RSP: 0018:ffffc90004147d18 EFLAGS: 00010246
RAX: 0000000000000031 RBX: ffff8880270926a8 RCX: fbe952512bddee00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffff11004e124fb R08: dffffc0000000000 R09: fffff52000828f45
R10: fffff52000828f45 R11: 1ffff92000828f44 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8cd13aa0 R15: ffff8880270927d8
FS:  00005555854ec500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c30eaab CR3: 000000005ba06000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400