VFS: Busy inodes after unmount of loop2 (iso9660)
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kernel BUG at fs/super.c:697!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5787 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+0x2ad/0x2b0 fs/super.c:695
Code: e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 3c 84 f0 ff 49 8b 16 48 81 c3 60 06 00 00 48 c7 c7 e0 9c b7 8a 48 89 de e8 c3 bc 76 08 <0f> 0b 90 66 0f 1f 00 55 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00
RSP: 0018:ffffc900047bfd20 EFLAGS: 00010246
RAX: 0000000000000031 RBX: ffff88801fb58660 RCX: 91582c160e845500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffff11003f6b0f2 R08: ffffc900047bfa27 R09: 1ffff920008f7f44
R10: dffffc0000000000 R11: fffff520008f7f45 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8cf28220 R15: ffff88801fb58790
FS:  000055558098e500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe5c2b45000 CR3: 0000000061eda000 CR4: 00000000003526e0
Call Trace:
 <TASK>
 kill_block_super+0x44/0x90 fs/super.c:1660
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250
 task_work_run+0x1ce/0x250 kernel/task_work.c:239
 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+0xf6/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7efe9bb901f7
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:00007fff402a9fd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007efe9bc11d7d RCX: 00007efe9bb901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff402aa090
RBP: 00007fff402aa090 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff402ab120
R13: 00007efe9bc11d7d R14: 00000000000591c3 R15: 00007fff402ab160
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:generic_shutdown_super+0x2ad/0x2b0 fs/super.c:695
Code: e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 3c 84 f0 ff 49 8b 16 48 81 c3 60 06 00 00 48 c7 c7 e0 9c b7 8a 48 89 de e8 c3 bc 76 08 <0f> 0b 90 66 0f 1f 00 55 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00
RSP: 0018:ffffc900047bfd20 EFLAGS: 00010246
RAX: 0000000000000031 RBX: ffff88801fb58660 RCX: 91582c160e845500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffff11003f6b0f2 R08: ffffc900047bfa27 R09: 1ffff920008f7f44
R10: dffffc0000000000 R11: fffff520008f7f45 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8cf28220 R15: ffff88801fb58790
FS:  000055558098e500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe5c2b4c000 CR3: 0000000061eda000 CR4: 00000000003526f0