tblock:ffffc900031412b0: 8b6d1c60 ffffffff 00000200 00000000
tblock:ffffc900031412c0: 00000000 00000000 00000000 00000000
tblock:ffffc900031412d0: 00000000 00000000 99c51880 ffffffff
tblock:ffffc900031412e0: 934ef690 ffffffff 00000000 00000000
tblock:ffffc900031412f0: 8babef20 ffffffff 00000300 00000000
tblock:ffffc90003141300: 03141300 ffffc900 03141300 ffffc900
tblock:ffffc90003141310: 60f2ee78 ffff8880 00000040 00000000
VFS: Busy inodes after unmount of loop4 (jfs)
------------[ cut here ]------------
kernel BUG at fs/super.c:657!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 5595 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/13/2026
RIP: 0010:generic_shutdown_super+0x2c4/0x2d0 fs/super.c:655
Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 66 81 f1 ff 49 8b 16 48 81 c3 48 08 00 00 48 c7 c7 40 c1 7d 8b 48 89 de e8 bd 3c ea 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:ffffc90004e9fbb0 EFLAGS: 00010246
RAX: 000000000000002d RBX: ffff888065a18848 RCX: 12b4c3c90b770100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1100cb4312a R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff520009d3f25 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8e6510e0 R15: ffff888065a18950
FS:  0000000000000000(0000) GS:ffff888125d45000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055764dac3db1 CR3: 000000003fcf6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kill_block_super+0x44/0x90 fs/super.c:1665
 deactivate_locked_super+0xbc/0x130 fs/super.c:477
 cleanup_mnt+0x3d3/0x460 fs/namespace.c:1317
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x73a/0x2360 kernel/exit.c:1009
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1152
 __do_sys_exit_group kernel/exit.c:1163 [inline]
 __se_sys_exit_group kernel/exit.c:1161 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1161
 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+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf6479de99
Code: Unable to access opcode bytes at 0x7fcf6479de6f.
RSP: 002b:00007ffc6395e538 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fcf6483332f RCX: 00007fcf6479de99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000000 R09: 00007fcf6483330a
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc6395f7f0
R13: 00007fcf6483330a R14: 00000000000274a7 R15: 00007ffc639619b0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:generic_shutdown_super+0x2c4/0x2d0 fs/super.c:655
Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 66 81 f1 ff 49 8b 16 48 81 c3 48 08 00 00 48 c7 c7 40 c1 7d 8b 48 89 de e8 bd 3c ea 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:ffffc90004e9fbb0 EFLAGS: 00010246
RAX: 000000000000002d RBX: ffff888065a18848 RCX: 12b4c3c90b770100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1100cb4312a R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff520009d3f25 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8e6510e0 R15: ffff888065a18950
FS:  0000000000000000(0000) GS:ffff888125d45000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055764dac4be0 CR3: 000000003fcf6000 CR4: 00000000003526f0