kasan: CONFIG_KASAN_INLINE enabled
SS:   sel=0x0000, attr=0x00085, limit=0x00000000, base=0x0000000000000000
ES:   sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000
kasan: GPF could be caused by NULL-ptr deref or user memory access
FS:   sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000
general protection fault: 0000 [#1] PREEMPT SMP KASAN
GS:   sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000
CPU: 1 PID: 15320 Comm: syz-executor2 Not tainted 4.20.0-rc1-next-20181107+ #107
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:locks_remove_flock+0x216/0x350 fs/locks.c:2567
Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40
GDTR:                           limit=0x00000000, base=0x0000000000000000
RSP: 0018:ffff8801bed07880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d
RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb
RBP: ffff8801bed07a60 R08: ffff880178b4e000 R09: ffffed003b5e5b67
R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: ffff8801c1bddc80
R13: ffff8801bed078f8 R14: 1ffff10037da0f13 R15: dffffc0000000000
FS:  0000000001c27940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000
CR2: 00007ff21784e000 CR3: 00000001ca4f1000 CR4: 00000000001426e0
IDTR:                           limit=0x00000000, base=0x0000000000000000
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
TR:   sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000
EFER =     0x0000000000000000  PAT = 0x0007040600070406
DebugCtl = 0x0000000000000000  DebugExceptions = 0x0000000000000000
Interruptibility = 00000000  ActivityState = 00000000
*** Host State ***
 locks_remove_file+0x148/0x5c0 fs/locks.c:2607
RIP = 0xffffffff8120262c  RSP = 0xffff8801bed0f390
 __fput+0x2f0/0xa70 fs/file_table.c:271
CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040
FSBase=00007f6e480ed700 GSBase=ffff8801dae00000 TRBase=fffffe0000003000
 ____fput+0x15/0x20 fs/file_table.c:312
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
GDTBase=fffffe0000001000 IDTBase=fffffe0000000000
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
CR0=0000000080050033 CR3=00000001ca4f1000 CR4=00000000001426f0
Sysenter RSP=fffffe0000002200 CS:RIP=0010:ffffffff87e01360
EFER = 0x0000000000000d01  PAT = 0x0407050600070106
*** Control State ***
PinBased=0000003f CPUBased=b5986dfa SecondaryExec=000000ca
EntryControls=0000d1ff ExitControls=002fefff
ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
VMEntry: intr_info=8000030c errcode=00000000 ilen=00000000
RIP: 0033:0x411021
VMExit: intr_info=00000000 errcode=00000000 ilen=00000003
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
        reason=80000021 qualification=0000000000000000
RSP: 002b:00007ffc4cb8e8f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000411021
RDX: 0000000000000000 RSI: 0000000000731ae8 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffc4cb8e820 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000000000b5 R15: 0000000000000002
IDTVectoring: info=00000000 errcode=00000000
Modules linked in:
---[ end trace 8737fca757044153 ]---
TSC Offset = 0xffffff1a04e6feb0
RIP: 0010:locks_remove_flock+0x216/0x350 fs/locks.c:2567
EPT pointer = 0x00000001c59ad01e
Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40
RSP: 0018:ffff8801bed07880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d
RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb
RBP: ffff8801bed07a60 R08: ffff880178b4e000 R09: ffffed003b5e5b67
R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: ffff8801c1bddc80
R13: ffff8801bed078f8 R14: 1ffff10037da0f13 R15: dffffc0000000000
FS:  0000000001c27940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff21784e000 CR3: 00000001ca4f1000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400