general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 PID: 4176 Comm: syz-executor Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x217/0x9c0 fs/jfs/jfs_logmgr.c:945
Code: 33 d0 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 97 f0 ef fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 7b f0 ef fe 49 8b 3f e8 93 33 d0 fe
RSP: 0018:ffffc90002f1fc00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 06ef0a50d7f4ad00
RDX: 0000000000000000 RSI: 0000000000000013 RDI: ffffc90002f1fb20
RBP: ffffc90002f1fd08 R08: dffffc0000000000 R09: fffffbfff1ad1586
R10: fffffbfff1ad1586 R11: 1ffffffff1ad1585 R12: dffffc0000000000
R13: ffff88807551c800 R14: ffff88802add8838 R15: 0000000000000030
FS:  000055555a44b500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe4d905df98 CR3: 0000000062811000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_syncpt+0x77/0x90 fs/jfs/jfs_logmgr.c:1049
 jfs_sync_fs+0x83/0xa0 fs/jfs/super.c:690
 sync_filesystem+0x1be/0x220 fs/sync.c:66
 generic_shutdown_super+0x6b/0x300 fs/super.c:448
 kill_block_super+0x7c/0xe0 fs/super.c:1427
 deactivate_locked_super+0x93/0xf0 fs/super.c:335
 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1139
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb19d253c57
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 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 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcfea35ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fb19d2d4925 RCX: 00007fb19d253c57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcfea35da0
RBP: 00007ffcfea35da0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcfea36e30
R13: 00007fb19d2d4925 R14: 0000000000013b6e R15: 00007ffcfea36e70
 </TASK>
Modules linked in:
---[ end trace aaa47d65a02c9d8a ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x217/0x9c0 fs/jfs/jfs_logmgr.c:945
Code: 33 d0 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 97 f0 ef fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 7b f0 ef fe 49 8b 3f e8 93 33 d0 fe
RSP: 0018:ffffc90002f1fc00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 06ef0a50d7f4ad00
RDX: 0000000000000000 RSI: 0000000000000013 RDI: ffffc90002f1fb20
RBP: ffffc90002f1fd08 R08: dffffc0000000000 R09: fffffbfff1ad1586
R10: fffffbfff1ad1586 R11: 1ffffffff1ad1585 R12: dffffc0000000000
R13: ffff88807551c800 R14: ffff88802add8838 R15: 0000000000000030
FS:  000055555a44b500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f45120000 CR3: 0000000062811000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	33 d0                	xor    %eax,%edx
   2:	fe 4d 8d             	decb   -0x73(%rbp)
   5:	7e f0                	jle    0xfffffff7
   7:	4c 89 f8             	mov    %r15,%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 ff             	mov    %r15,%rdi
  17:	e8 97 f0 ef fe       	call   0xfeeff0b3
  1c:	4d 8b 3f             	mov    (%r15),%r15
  1f:	49 83 c7 30          	add    $0x30,%r15
  23:	4c 89 f8             	mov    %r15,%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 ff             	mov    %r15,%rdi
  33:	e8 7b f0 ef fe       	call   0xfeeff0b3
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 93 33 d0 fe       	call   0xfed033d3