Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 5860 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:jfs_flush_journal+0x94b/0xed0 fs/jfs/jfs_logmgr.c:1582
Code: f8 7c fe 4d 8d 75 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 83 fe e0 fe 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 67 fe e0 fe 49 8b 3e e8 2f 84 b3 fe
RSP: 0018:ffffc900041ef980 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88802b7d1e00
RDX: 0000000000000000 RSI: fffffffffffffffe RDI: 0000000000000000
RBP: ffffc900041efab0 R08: ffffffff8fc3eb37 R09: 1ffffffff1f87d66
R10: dffffc0000000000 R11: fffffbfff1f87d67 R12: 0000000000000000
R13: ffff8880569d7a38 R14: 0000000000000030 R15: ffff88807b521a28
FS:  0000000000000000(0000) GS:ffff8881259fa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc8dd91000 CR3: 000000004ac60000 CR4: 00000000003526f0
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+0x132/0x2c0 fs/super.c:643
 kill_block_super+0x44/0x90 fs/super.c:1723
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1383
 task_work_run+0x1d1/0x260 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: 0033:0x7f4bcb98ebe9
Code: Unable to access opcode bytes at 0x7f4bcb98ebbf.
RSP: 002b:00007ffd44964048 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4bcba11c2a RCX: 00007f4bcb98ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000002 R08: 00007ffd44961de7 R09: 00007ffd44965300
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd44965300
R13: 00007f4bcba11c05 R14: 00000000000fdc18 R15: 00007ffd449674c0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:jfs_flush_journal+0x94b/0xed0 fs/jfs/jfs_logmgr.c:1582
Code: f8 7c fe 4d 8d 75 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 83 fe e0 fe 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 67 fe e0 fe 49 8b 3e e8 2f 84 b3 fe
RSP: 0018:ffffc900041ef980 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88802b7d1e00
RDX: 0000000000000000 RSI: fffffffffffffffe RDI: 0000000000000000
RBP: ffffc900041efab0 R08: ffffffff8fc3eb37 R09: 1ffffffff1f87d66
R10: dffffc0000000000 R11: fffffbfff1f87d67 R12: 0000000000000000
R13: ffff8880569d7a38 R14: 0000000000000030 R15: ffff88807b521a28
FS:  0000000000000000(0000) GS:ffff8881259fa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557231f7a078 CR3: 000000007ece4000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	f8                   	clc
   1:	7c fe                	jl     0x1
   3:	4d 8d 75 d8          	lea    -0x28(%r13),%r14
   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 83 fe e0 fe       	call   0xfee0fe9f
  1c:	4d 8b 36             	mov    (%r14),%r14
  1f:	49 83 c6 30          	add    $0x30,%r14
  23:	4c 89 f0             	mov    %r14,%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 f7             	mov    %r14,%rdi
  33:	e8 67 fe e0 fe       	call   0xfee0fe9f
  38:	49 8b 3e             	mov    (%r14),%rdi
  3b:	e8 2f 84 b3 fe       	call   0xfeb3846f