Oops: general protection fault, probably for non-canonical address 0xdffffc000000003d: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000001e8-0x00000000000001ef]
CPU: 1 UID: 0 PID: 115 Comm: jfsCommit 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:kasan_byte_accessible+0x12/0x30
Code: 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 80 9d 5c 09 cc 66 66 66 66 66 66 2e
RSP: 0018:ffffc9000242fb00 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffffffff8b823582 RCX: cf259530351b2400
RDX: 0000000000000000 RSI: ffffffff8b823582 RDI: 000000000000003d
RBP: ffffffff834796ee R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f86aef R12: 0000000000000000
R13: 00000000000001e8 R14: 00000000000001e8 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881a39fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0924bc7fc8 CR3: 000000002cc80000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __kasan_check_byte+0x12/0x40
 lock_acquire+0x8d/0x360
 _raw_spin_lock_irq+0xa2/0xf0
 jfs_lazycommit+0x49e/0xa90
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kasan_byte_accessible+0x12/0x30
Code: 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 80 9d 5c 09 cc 66 66 66 66 66 66 2e
RSP: 0018:ffffc9000242fb00 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffffffff8b823582 RCX: cf259530351b2400
RDX: 0000000000000000 RSI: ffffffff8b823582 RDI: 000000000000003d
RBP: ffffffff834796ee R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f86aef R12: 0000000000000000
R13: 00000000000001e8 R14: 00000000000001e8 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881a39fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0924bc7fc8 CR3: 000000002cc80000 CR4: 00000000000006f0
