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: 117 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+0x138/0x9d0
Code: 8d ae fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 96 f7 dc 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 7a f7 dc fe 49 8b 3f e8 c2 8d ae fe
RSP: 0018:ffffc90003107ac0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff888169afba80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003107bc8 R08: ffffc90003107a0f R09: 0000000000000000
R10: ffffc900031078a8 R11: fffff52000620f42 R12: ffff888174ef5000
R13: dffffc0000000000 R14: ffff88817500f838 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff88818e8c3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555df829f358 CR3: 0000000109878000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90
 txEnd+0x2e5/0x530
 jfs_lazycommit+0x5ba/0xa90
 kthread+0x711/0x8a0
 ret_from_fork+0x599/0xb30
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lmLogSync+0x138/0x9d0
Code: 8d ae fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 96 f7 dc 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 7a f7 dc fe 49 8b 3f e8 c2 8d ae fe
RSP: 0018:ffffc90003107ac0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff888169afba80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003107bc8 R08: ffffc90003107a0f R09: 0000000000000000
R10: ffffc900031078a8 R11: fffff52000620f42 R12: ffff888174ef5000
R13: dffffc0000000000 R14: ffff88817500f838 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff88818e8c3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeffb11d88 CR3: 0000000174254000 CR4: 00000000000006f0
