sp0: Synchronizing with TNC
sp0: Found TNC
loop0: detected capacity change from 0 to 32768
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 5360 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:diRead+0x420/0xb90 fs/jfs/jfs_imap.c:342
Code: 3c 08 00 4c 8b 7c 24 10 74 08 4c 89 f7 e8 88 5a e6 fe 49 8b 1e 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 a4 05 00 00 8b 1b bf 40 00 00 00 89 de e8
RSP: 0018:ffffc9000d56ef18 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: ffffc9000e1d2000 RSI: 00000000000007ca RDI: 00000000000007cb
RBP: 000000000000001c R08: ffff888043ac25af R09: 1ffff110087584b5
R10: dffffc0000000000 R11: ffffed10087584b6 R12: 0000000000000000
R13: ffff888052ef62e8 R14: ffff88803fa744a0 R15: 0000000000000000
FS:  00007f3d96de66c0(0000) GS:ffff88808d20c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000005a40 CR3: 0000000042987000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 jfs_iget+0x89/0x3e0 fs/jfs/inode.c:35
 jfs_lookup+0x1c5/0x380 fs/jfs/namei.c:1469
 __lookup_slow+0x294/0x3d0 fs/namei.c:1808
 lookup_slow+0x53/0x70 fs/namei.c:1825
 walk_component+0x2d2/0x400 fs/namei.c:2129
 lookup_last fs/namei.c:2630 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2654
 filename_lookup+0x212/0x570 fs/namei.c:2683
 kern_path+0x35/0x50 fs/namei.c:2816
 unix_find_bsd net/unix/af_unix.c:1236 [inline]
 unix_find_other+0x183/0xb40 net/unix/af_unix.c:1298
 unix_dgram_sendmsg+0x76e/0x18d0 net/unix/af_unix.c:2174
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:729
 ____sys_sendmsg+0x52d/0x830 net/socket.c:2614
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
 __sys_sendmmsg+0x227/0x430 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2781
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3d95f8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3d96de6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f3d961c5fa0 RCX: 00007f3d95f8ebe9
RDX: 0000000000000002 RSI: 0000200000005a40 RDI: 000000000000000c
RBP: 00007f3d96011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3d961c6038 R14: 00007f3d961c5fa0 R15: 00007fff07680b88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diRead+0x420/0xb90 fs/jfs/jfs_imap.c:342
Code: 3c 08 00 4c 8b 7c 24 10 74 08 4c 89 f7 e8 88 5a e6 fe 49 8b 1e 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 a4 05 00 00 8b 1b bf 40 00 00 00 89 de e8
RSP: 0018:ffffc9000d56ef18 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: ffffc9000e1d2000 RSI: 00000000000007ca RDI: 00000000000007cb
RBP: 000000000000001c R08: ffff888043ac25af R09: 1ffff110087584b5
R10: dffffc0000000000 R11: ffffed10087584b6 R12: 0000000000000000
R13: ffff888052ef62e8 R14: ffff88803fa744a0 R15: 0000000000000000
FS:  00007f3d96de66c0(0000) GS:ffff88808d20c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ab3abbb168 CR3: 0000000042987000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	3c 08                	cmp    $0x8,%al
   2:	00 4c 8b 7c          	add    %cl,0x7c(%rbx,%rcx,4)
   6:	24 10                	and    $0x10,%al
   8:	74 08                	je     0x12
   a:	4c 89 f7             	mov    %r14,%rdi
   d:	e8 88 5a e6 fe       	call   0xfee65a9a
  12:	49 8b 1e             	mov    (%r14),%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 a4 05 00 00    	jne    0x5da
  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