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: 118 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:lmLogSync+0xfb/0x9d0
Code: 86 7e fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 b3 f4 e1 fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 97 f4 e1 fe 49 8b 3f e8 7f f5 b4 fe
RSP: 0018:ffffc9000246fb00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88801f099cc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000246fc08 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc9000246fb60 R11: fffff5200048df70 R12: ffff888116383000
R13: dffffc0000000000 R14: ffff8881235c1a38 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe34e12000 CR3: 0000000038190000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90
 txEnd+0x2e5/0x530
 jfs_lazycommit+0x5ba/0xa90
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lmLogSync+0xfb/0x9d0
Code: 86 7e fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 b3 f4 e1 fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 97 f4 e1 fe 49 8b 3f e8 7f f5 b4 fe
RSP: 0018:ffffc9000246fb00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88801f099cc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000246fc08 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc9000246fb60 R11: fffff5200048df70 R12: ffff888116383000
R13: dffffc0000000000 R14: ffff8881235c1a38 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055bb95389950 CR3: 0000000029cd6000 CR4: 00000000000006f0
