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: 6276 Comm: syz.3.73 Not tainted syzkaller #0 PREEMPT_{RT,(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:208 [inline]
RIP: 0010:lmLogSync+0x22e/0x9d0 fs/jfs/jfs_logmgr.c:937
Code: 71 b7 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 60 98 e1 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 44 98 e1 fe 49 8b 3f e8 6c 71 b7 fe
RSP: 0018:ffffc900049e7ae0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88802f569e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900049e7bf8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900049e78c8 R11: fffff5200093cf46 R12: 0000000000000000
R13: ffff888026985800 R14: ffff888041c50a38 R15: 0000000000000030
FS:  00007f80fd7956c0(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f80fd794f98 CR3: 0000000037b0c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90 fs/jfs/jfs_logmgr.c:1041
 jfs_sync_fs+0x87/0xa0 fs/jfs/super.c:650
 sync_filesystem+0xed/0x250 fs/sync.c:56
 jfs_reconfigure+0xc6/0xa00 fs/jfs/super.c:370
 reconfigure_super+0x227/0x880 fs/super.c:1077
 do_remount fs/namespace.c:3264 [inline]
 path_mount+0xd29/0xff0 fs/namespace.c:4014
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount+0x313/0x410 fs/namespace.c:4201
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f80fe150eea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f80fd794e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f80fd794ef0 RCX: 00007f80fe150eea
RDX: 0000200000000f40 RSI: 0000200000000f00 RDI: 0000000000000000
RBP: 0000200000000f40 R08: 00007f80fd794ef0 R09: 0000000001aca421
R10: 0000000001aca421 R11: 0000000000000246 R12: 0000200000000f00
R13: 00007f80fd794eb0 R14: 0000000000000000 R15: 00002000000008c0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x22e/0x9d0 fs/jfs/jfs_logmgr.c:937
Code: 71 b7 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 60 98 e1 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 44 98 e1 fe 49 8b 3f e8 6c 71 b7 fe
RSP: 0018:ffffc900049e7ae0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88802f569e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900049e7bf8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900049e78c8 R11: fffff5200093cf46 R12: 0000000000000000
R13: ffff888026985800 R14: ffff888041c50a38 R15: 0000000000000030
FS:  00007f80fd7956c0(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f80fd794f98 CR3: 0000000037b0c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	71 b7                	jno    0xffffffb9
   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 60 98 e1 fe       	call   0xfee1987c
  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 44 98 e1 fe       	call   0xfee1987c
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 6c 71 b7 fe       	call   0xfeb771ac