syzbot

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: 6067 Comm: syz.0.23 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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:ffffc900041e7698 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10098a2157 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000024 R15: ffff8880246a26a0
FS:  00007f82774ad6c0(0000) GS:ffff888126111000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb03f4a000 CR3: 000000003da74000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 jfs_iget+0x89/0x470 fs/jfs/inode.c:35
 jfs_lookup+0x220/0x420 fs/jfs/namei.c:1472
 __lookup_slow+0x1fb/0x2f0 fs/namei.c:1919
 lookup_slow+0x53/0x70 fs/namei.c:1936
 walk_component fs/namei.c:2282 [inline]
 lookup_last fs/namei.c:2789 [inline]
 path_lookupat+0x3f5/0x8c0 fs/namei.c:2813
 filename_lookup+0x265/0x5d0 fs/namei.c:2842
 vfs_statx+0xfc/0x200 fs/stat.c:353
 vfs_fstatat fs/stat.c:373 [inline]
 vfs_lstat include/linux/fs.h:3216 [inline]
 __do_sys_newlstat fs/stat.c:524 [inline]
 __se_sys_newlstat fs/stat.c:518 [inline]
 __x64_sys_newlstat+0x125/0x1e0 fs/stat.c:518
 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: 0033:0x7f8277e6ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f82774ad028 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 00007f82780e6090 RCX: 00007f8277e6ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007f8277f02e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f82780e6128 R14: 00007f82780e6090 R15: 00007ffe9bf15088
 </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:ffffc900041e7698 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10098a2157 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000024 R15: ffff8880246a26a0
FS:  00007f82774ad6c0(0000) GS:ffff888126111000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb03f4a000 CR3: 000000003da74000 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