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: 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: 2f 7e fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 83 ac 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 67 ac e1 fe 49 8b 3f e8 8f 9e b4 fe
RSP: 0018:ffffc9000243fb00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff8881061d8000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000243fc08 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc9000243fb60 R11: fffff52000487f70 R12: ffff888025f1e000
R13: dffffc0000000000 R14: ffff88810ae90838 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8880b8612000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe41ddff000 CR3: 0000000106c22000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90
 txEnd+0x2e5/0x530
 jfs_lazycommit+0x5ba/0xa90
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lmLogSync+0xfb/0x9d0
Code: 2f 7e fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 83 ac 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 67 ac e1 fe 49 8b 3f e8 8f 9e b4 fe
RSP: 0018:ffffc9000243fb00 EFLAGS: 00010206

RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff8881061d8000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000243fc08 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc9000243fb60 R11: fffff52000487f70 R12: ffff888025f1e000
R13: dffffc0000000000 R14: ffff88810ae90838 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8881a3c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3ade7c CR3: 00000001108fa000 CR4: 00000000000006f0
