ERROR: (device loop5): txCommit: 
ERROR: (device loop5): remounting filesystem as read-only
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 5853 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:jfs_flush_journal+0x7ba/0xed0 fs/jfs/jfs_logmgr.c:1572
Code: 00 00 00 4d 8d 77 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 b4 b7 de fe 4d 8b 26 49 83 c4 30 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 98 b7 de fe 49 8b 3c 24 e8 6f 9e b0
RSP: 0018:ffffc90004a8f980 EFLAGS: 00010216
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88807ae60000 RSI: 0000000000000002 RDI: 0000000000000002
RBP: ffffc90004a8fab0 R08: ffffffff8f7ce777 R09: 1ffffffff1ef9cee
R10: dffffc0000000000 R11: fffffbfff1ef9cef R12: 0000000000000030
R13: ffff88805347d9a8 R14: ffff888027612e10 R15: ffff888027612e38
FS:  0000000000000000(0000) GS:ffff88812613b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6468fb12f8 CR3: 000000005ca8d000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 jfs_umount+0x178/0x3c0 fs/jfs/jfs_umount.c:58
 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x135/0x2c0 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1722
 deactivate_locked_super+0xbc/0x130 fs/super.c:473
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1327
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:966
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 __do_sys_exit_group kernel/exit.c:1118 [inline]
 __se_sys_exit_group kernel/exit.c:1116 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1116
 x64_sys_call+0x21f7/0x2200 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7eff4818f6c9
Code: Unable to access opcode bytes at 0x7eff4818f69f.
RSP: 002b:00007ffcce3a1c88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007eff48211da2 RCX: 00007eff4818f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000002 R08: 00007ffcce39fa27 R09: 00007ffcce3a2f40
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcce3a2f40
R13: 00007eff48211d7d R14: 000055556df174a8 R15: 00007ffcce3a4010
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:jfs_flush_journal+0x7ba/0xed0 fs/jfs/jfs_logmgr.c:1572
Code: 00 00 00 4d 8d 77 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 b4 b7 de fe 4d 8b 26 49 83 c4 30 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 98 b7 de fe 49 8b 3c 24 e8 6f 9e b0
RSP: 0018:ffffc90004a8f980 EFLAGS: 00010216
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88807ae60000 RSI: 0000000000000002 RDI: 0000000000000002
RBP: ffffc90004a8fab0 R08: ffffffff8f7ce777 R09: 1ffffffff1ef9cee
R10: dffffc0000000000 R11: fffffbfff1ef9cef R12: 0000000000000030
R13: ffff88805347d9a8 R14: ffff888027612e10 R15: ffff888027612e38
FS:  0000000000000000(0000) GS:ffff88812613b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcddafb12f8 CR3: 0000000077fd7000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 4d 8d             	add    %cl,-0x73(%rbp)
   5:	77 d8                	ja     0xffffffdf
   7:	4c 89 f0             	mov    %r14,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  12:	74 08                	je     0x1c
  14:	4c 89 f7             	mov    %r14,%rdi
  17:	e8 b4 b7 de fe       	call   0xfedeb7d0
  1c:	4d 8b 26             	mov    (%r14),%r12
  1f:	49 83 c4 30          	add    $0x30,%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 e7             	mov    %r12,%rdi
  33:	e8 98 b7 de fe       	call   0xfedeb7d0
  38:	49 8b 3c 24          	mov    (%r12),%rdi
  3c:	e8                   	.byte 0xe8
  3d:	6f                   	outsl  %ds:(%rsi),(%dx)
  3e:	9e                   	sahf
  3f:	b0                   	.byte 0xb0