kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 8001 Comm: syz-executor317 Not tainted 4.14.305-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
task: ffff88809592c3c0 task.stack: ffff8880ab7e0000
RIP: 0010:lbmStartIO+0x14a/0x490 fs/jfs/jfs_logmgr.c:2143
RSP: 0018:ffff8880ab7e7af8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880a04cb000 RCX: 0000000000000003
RDX: 000000000000001c RSI: 0000000000000000 RDI: 00000000000000e0
RBP: ffff88809cb5e140 R08: 0000000000000001 R09: ffff88809cb5e140
R10: ffff88809cb5e1c7 R11: 0000000000000000 R12: ffff88809abe6900
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000555556ca1300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005624876bc000 CR3: 00000000a9032000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lbmWrite+0x254/0x380 fs/jfs/jfs_logmgr.c:2092
 lmNextPage.isra.0+0x263/0x700 fs/jfs/jfs_logmgr.c:637
 lmWriteRecord+0x8b2/0xe30 fs/jfs/jfs_logmgr.c:550
 lmLogSync+0x126/0x660 fs/jfs/jfs_logmgr.c:990
 jfs_syncpt+0x66/0x70 fs/jfs/jfs_logmgr.c:1062
 jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:718
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem fs/sync.c:64 [inline]
 sync_filesystem+0xe2/0x230 fs/sync.c:48
 generic_shutdown_super+0x70/0x370 fs/super.c:432
 kill_block_super+0x95/0xe0 fs/super.c:1161
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 deactivate_super+0x7f/0xa0 fs/super.c:350
 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fd6576ade37
RSP: 002b:00007ffc54bdc718 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd6576ade37
RDX: 00007ffc54bdc7da RSI: 000000000000000a RDI: 00007ffc54bdc7d0
RBP: 00007ffc54bdc7d0 R08: 00000000ffffffff R09: 00007ffc54bdc5b0
R10: 0000555556ca2683 R11: 0000000000000206 R12: 00007ffc54bdd840
R13: 0000555556ca25f0 R14: 00007ffc54bdc740 R15: 0000000000000039
Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 20 49 8d bd e0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d5 02 00 00 4d 8b ad e0 00 00 00 4d 39 ee 74 
RIP: lbmStartIO+0x14a/0x490 fs/jfs/jfs_logmgr.c:2143 RSP: ffff8880ab7e7af8
---[ end trace 13d23dfb8cabf458 ]---
----------------
Code disassembly (best guess):
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 06 03 00 00    	jne    0x314
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	4d 8b 6c 24 20       	mov    0x20(%r12),%r13
  1d:	49 8d bd e0 00 00 00 	lea    0xe0(%r13),%rdi
  24:	48 89 fa             	mov    %rdi,%rdx
  27:	48 c1 ea 03          	shr    $0x3,%rdx
* 2b:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2f:	0f 85 d5 02 00 00    	jne    0x30a
  35:	4d 8b ad e0 00 00 00 	mov    0xe0(%r13),%r13
  3c:	4d 39 ee             	cmp    %r13,%r14
  3f:	74                   	.byte 0x74