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: 21679 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:diRead+0x41e/0xbc0
Code: 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 4a dc cf 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:ffffc90003ae77f8 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020
RBP: dffffc0000000000 R08: ffff88802857593f R09: 1ffff110050aeb27
R10: dffffc0000000000 R11: ffffed10050aeb28 R12: 0000000000000000
R13: 0000000000000000 R14: 000000000000001c R15: ffff88810bb4c0a0
FS:  0000555591c82500(0000) GS:ffff88818d951000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558ff89856f8 CR3: 000000002cd04000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 jfs_iget+0x89/0x470
 jfs_lookup+0x220/0x420
 __lookup_slow+0x1fb/0x2f0
 lookup_slow+0x53/0x70
 path_lookupat+0x3f5/0x8c0
 filename_lookup+0x265/0x5d0
 user_path_at+0x40/0x160
 __x64_sys_umount+0xf6/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f073439f257
Code: a2 c7 05 9c 44 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff4b41c258 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f073443445c RCX: 00007f073439f257
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff4b41c310
RBP: 00007fff4b41c310 R08: 00007fff4b41d310 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff4b41d400
R13: 00007f073443445c R14: 000000000013889a R15: 00007fff4b41e4d0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diRead+0x41e/0xbc0
Code: 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 4a dc cf 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:ffffc90003ae77f8 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020
RBP: dffffc0000000000 R08: ffff88802857593f R09: 1ffff110050aeb27
R10: dffffc0000000000 R11: ffffed10050aeb28 R12: 0000000000000000
R13: 0000000000000000 R14: 000000000000001c R15: ffff88810bb4c0a0
FS:  0000555591c82500(0000) GS:ffff88818d951000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd2b467e000 CR3: 000000002cd04000 CR4: 00000000000006f0
