tblock:ffffc900027496e0: 00000001 00000000 027497f8 ffffc900
tblock:ffffc900027496f0: 027495d8 ffffc900 00003cbc 00000000
tblock:ffffc90002749700: 342b6300 ffff8880 00000003 00000cbc
tblock:ffffc90002749710: 00000000 dead4ead ffffffff 00000000
tblock:ffffc90002749720: ffffffff ffffffff 9b2e5cc0 ffffffff
tblock:ffffc90002749730: 00000000 00000000 00000000 00000000
tblock:ffffc90002749740: 8bf6b560 ffffffff 00000300 00000000
tblock:ffffc90002749750: 02749750 ffffc900 02749750 ffffc900
tblock:ffffc90002749760: 74bc0d58 ffff8880 00000000 00000000
VFS: Busy inodes after unmount of loop4 (jfs)
------------[ cut here ]------------
kernel BUG at fs/super.c:654!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5963 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:generic_shutdown_super.cold+0x59/0x62 fs/super.c:654
Code: 48 c1 ea 03 80 3c 02 00 74 08 48 89 ef e8 ea 7d 4f 01 48 8b 55 00 48 8d b3 68 06 00 00 48 c7 c7 20 ca c4 8b e8 e3 54 fd ff 90 <0f> 0b e8 cb 7d 4f 01 eb bd e8 24 df e3 00 48 8d bb 98 00 00 00 b8
RSP: 0018:ffffc90003807d58 EFLAGS: 00010286
RAX: 000000000000002d RBX: ffff888057f6e000 RCX: 0000000000000000
RDX: 000000000000002d RSI: ffffffff81e7a629 RDI: fffff52000700f9c
RBP: ffffffff8ee27380 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff888057f6e9c0
R13: ffff888057f6e780 R14: 0000000000000000 R15: ffff888073f24200
FS:  0000555576302500(0000) GS:ffff888124439000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f044b5ff000 CR3: 000000005bfbb000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kill_block_super+0x3b/0xa0 fs/super.c:1725
 deactivate_locked_super+0xc1/0x1b0 fs/super.c:476
 deactivate_super fs/super.c:509 [inline]
 deactivate_super+0xe7/0x110 fs/super.c:505
 cleanup_mnt+0x21f/0x450 fs/namespace.c:1312
 task_work_run+0x150/0x240 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0x100/0x4a0 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbefed9da57
Code: a2 c7 05 9c fc 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffde98523c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fbefee32048 RCX: 00007fbefed9da57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffde9852480
RBP: 00007ffde9852480 R08: 00007ffde9853480 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffde9853510
R13: 00007fbefee32048 R14: 0000000000030c60 R15: 00007ffde9853550
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:generic_shutdown_super.cold+0x59/0x62 fs/super.c:654
Code: 48 c1 ea 03 80 3c 02 00 74 08 48 89 ef e8 ea 7d 4f 01 48 8b 55 00 48 8d b3 68 06 00 00 48 c7 c7 20 ca c4 8b e8 e3 54 fd ff 90 <0f> 0b e8 cb 7d 4f 01 eb bd e8 24 df e3 00 48 8d bb 98 00 00 00 b8
RSP: 0018:ffffc90003807d58 EFLAGS: 00010286

RAX: 000000000000002d RBX: ffff888057f6e000 RCX: 0000000000000000
RDX: 000000000000002d RSI: ffffffff81e7a629 RDI: fffff52000700f9c
RBP: ffffffff8ee27380 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff888057f6e9c0
R13: ffff888057f6e780 R14: 0000000000000000 R15: ffff888073f24200
FS:  0000555576302500(0000) GS:ffff888124339000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9b2f563000 CR3: 000000005bfbb000 CR4: 0000000000350ef0