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: 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:lmLogSync+0xfb/0x9d0
Code: 5b 7e fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 73 cd 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 57 cd e1 fe 49 8b 3f e8 ff ca b4 fe
RSP: 0018:ffffc9000241fb00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88801edab980 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000241fc08 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc9000241fb60 R11: fffff52000483f70 R12: ffff888030eb0800
R13: dffffc0000000000 R14: ffff88810a352838 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21b43ff000 CR3: 000000002f31a000 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: 5b 7e fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 73 cd 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 57 cd e1 fe 49 8b 3f e8 ff ca b4 fe
RSP: 0018:ffffc9000241fb00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88801edab980 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000241fc08 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc9000241fb60 R11: fffff52000483f70 R12: ffff888030eb0800
R13: dffffc0000000000 R14: ffff88810a352838 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21b43ff000 CR3: 000000011ea90000 CR4: 00000000000006f0
