tblock:ffffc900031312e0: 931ddde8 ffffffff 00000000 00000000
tblock:ffffc900031312f0: 8b8b7a20 ffffffff 00000300 00000000
tblock:ffffc90003131300: 03131300 ffffc900 03131300 ffffc900
tblock:ffffc90003131310: 62cbee78 ffff8880 00000012 00000000
VFS: Busy inodes after unmount of loop8 (jfs)
------------[ cut here ]------------
kernel BUG at fs/super.c:656!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 14380 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:generic_shutdown_super+0x2c4/0x2d0 fs/super.c:654
Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 46 81 f2 ff 49 8b 16 48 81 c3 c8 07 00 00 48 c7 c7 e0 5c 5d 8b 48 89 de e8 2d 59 ee fe 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900050efba0 EFLAGS: 00010246
RAX: 000000000000002d RBX: ffff8880622fa7c8 RCX: 7e0be36fe4c5bf00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1100c45f51a R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a1df25 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8e44bf80 R15: ffff8880622fa8d0
FS:  0000000000000000(0000) GS:ffff888126170000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005567e5942950 CR3: 000000003771c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kill_block_super+0x44/0x90 fs/super.c:1725
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x70f/0x22c0 kernel/exit.c:976
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1119
 __do_sys_exit_group kernel/exit.c:1130 [inline]
 __se_sys_exit_group kernel/exit.c:1128 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1128
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdccb9ece59
Code: Unable to access opcode bytes at 0x7fdccb9ece2f.
RSP: 002b:00007ffc3fe91058 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fdccba821ef RCX: 00007fdccb9ece59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000000 R09: 00007fdccba821ca
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc3fe92310
R13: 00007fdccba821ca R14: 00000000000f3c63 R15: 00007ffc3fe944d0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:generic_shutdown_super+0x2c4/0x2d0 fs/super.c:654
Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 46 81 f2 ff 49 8b 16 48 81 c3 c8 07 00 00 48 c7 c7 e0 5c 5d 8b 48 89 de e8 2d 59 ee fe 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900050efba0 EFLAGS: 00010246
RAX: 000000000000002d RBX: ffff8880622fa7c8 RCX: 7e0be36fe4c5bf00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1100c45f51a R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a1df25 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8e44bf80 R15: ffff8880622fa8d0
FS:  0000000000000000(0000) GS:ffff888126170000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005567e5942950 CR3: 000000009fc6e000 CR4: 00000000003526f0