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: 7569 Comm: syz.2.344 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
RIP: 0010:diRead+0x41e/0xbc0 fs/jfs/jfs_imap.c:342
Code: 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 ba eb d4 fe 49 8b 1f 48 83 c3 34 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 ca 05 00 00 8b 1b bf 40 00 00 00 89 de e8
RSP: 0018:ffffc90006cc79d8 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: ffffc9000ff81000 RSI: 000000000000062e RDI: 000000000000062f
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100b757aff R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000024 R15: ffff88803c7db0a0
FS:  00007efe0fb2d6c0(0000) GS:ffff888126217000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7b0e555d58 CR3: 000000005c206000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 jfs_iget+0x89/0x470 fs/jfs/inode.c:35
 jfs_lookup+0x220/0x420 fs/jfs/namei.c:1472
 lookup_one_qstr_excl+0x12d/0x360 fs/namei.c:1810
 __start_dirop fs/namei.c:2920 [inline]
 start_dirop fs/namei.c:2942 [inline]
 filename_create+0x20e/0x370 fs/namei.c:4951
 filename_mkdirat+0xd2/0x520 fs/namei.c:5298
 __do_sys_mkdirat fs/namei.c:5326 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5323
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efe118fbcc7
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 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:00007efe0fb2ce58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007efe0fb2cee0 RCX: 00007efe118fbcc7
RDX: 00000000000001ff RSI: 0000200000000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000080
R13: 00007efe0fb2cea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diRead+0x41e/0xbc0 fs/jfs/jfs_imap.c:342
Code: 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 ba eb d4 fe 49 8b 1f 48 83 c3 34 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 ca 05 00 00 8b 1b bf 40 00 00 00 89 de e8
RSP: 0018:ffffc90006cc79d8 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: ffffc9000ff81000 RSI: 000000000000062e RDI: 000000000000062f
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100b757aff R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000024 R15: ffff88803c7db0a0
FS:  00007efe0fb2d6c0(0000) GS:ffff888126117000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc2ba542000 CR3: 000000005c206000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	00 fc                	add    %bh,%ah
   2:	ff                   	lcall  (bad)
   3:	df 80 3c 08 00 74    	filds  0x7400083c(%rax)
   9:	08 4c 89 ff          	or     %cl,-0x1(%rcx,%rcx,4)
   d:	e8 ba eb d4 fe       	call   0xfed4ebcc
  12:	49 8b 1f             	mov    (%r15),%rbx
  15:	48 83 c3 34          	add    $0x34,%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 ca 05 00 00    	jne    0x600
  36:	8b 1b                	mov    (%rbx),%ebx
  38:	bf 40 00 00 00       	mov    $0x40,%edi
  3d:	89 de                	mov    %ebx,%esi
  3f:	e8                   	.byte 0xe8