Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 UID: 0 PID: 6924 Comm: syz.8.141 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:jfs_flush_journal+0x9ad/0xef0 fs/jfs/jfs_logmgr.c:1581
Code: 03 af fe 4d 8d 75 f0 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 d1 fb d9 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 b5 fb d9 fe 49 8b 3e e8 dd 02 af fe
RSP: 0018:ffffc90005cff980 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90005291000 RSI: 0000000000003d87 RDI: 0000000000003d88
RBP: ffffc90005cffac0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90005cff768 R11: fffff52000b9ff1a R12: 000000000000002e
R13: ffff888037b2b638 R14: 0000000000000030 R15: ffff8880635a22d8
FS:  00007fcd0d63e6c0(0000) GS:ffff888126695000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f63cf227a0 CR3: 0000000056a8a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 jfs_umount+0x178/0x3c0 fs/jfs/jfs_umount.c:58
 jfs_fill_super+0x9c5/0xd80 fs/jfs/super.c:567
 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694
 vfs_get_tree+0x92/0x2a0 fs/super.c:1754
 fc_mount fs/namespace.c:1193 [inline]
 do_new_mount_fc fs/namespace.c:3760 [inline]
 do_new_mount+0x341/0xd30 fs/namespace.c:3836
 do_mount fs/namespace.c:4159 [inline]
 __do_sys_mount fs/namespace.c:4348 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4325
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd0f3ed20a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcd0d63de58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fcd0d63dee0 RCX: 00007fcd0f3ed20a
RDX: 00002000000001c0 RSI: 0000200000000180 RDI: 00007fcd0d63dea0
RBP: 00002000000001c0 R08: 00007fcd0d63dee0 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000246 R12: 0000200000000180
R13: 00007fcd0d63dea0 R14: 00000000000061b9 R15: 000020000009df00
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:jfs_flush_journal+0x9ad/0xef0 fs/jfs/jfs_logmgr.c:1581
Code: 03 af fe 4d 8d 75 f0 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 d1 fb d9 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 b5 fb d9 fe 49 8b 3e e8 dd 02 af fe
RSP: 0018:ffffc90005cff980 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90005291000 RSI: 0000000000003d87 RDI: 0000000000003d88
RBP: ffffc90005cffac0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90005cff768 R11: fffff52000b9ff1a R12: 000000000000002e
R13: ffff888037b2b638 R14: 0000000000000030 R15: ffff8880635a22d8
FS:  00007fcd0d63e6c0(0000) GS:ffff888126695000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f63cf227a0 CR3: 0000000056a8a000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	03 af fe 4d 8d 75    	add    0x758d4dfe(%rdi),%ebp
   6:	f0 4c 89 f0          	lock 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 d1 fb d9 fe       	call   0xfed9fbed
  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 b5 fb d9 fe       	call   0xfed9fbed
  38:	49 8b 3e             	mov    (%r14),%rdi
  3b:	e8 dd 02 af fe       	call   0xfeaf031d