BUG: unable to handle kernel paging request at 00000000f5db8a49
IP: __put_user_4+0x1e/0x30 arch/x86/lib/putuser.S:70
PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0 
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 4178 Comm: syz-executor2 Not tainted 4.15.0-rc2-next-20171205+ #59
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 00000000f897ec09 task.stack: 00000000ec7e4838
RIP: 0010:__put_user_4+0x1e/0x30 arch/x86/lib/putuser.S:70
RSP: 0018:ffff8801d3727f08 EFLAGS: 00010297
RAX: 0000000000000000 RBX: 00007fffffffeffd RCX: 0000000020000000
RDX: 0000000000000119 RSI: ffffc90003139000 RDI: 0000000000000282
RBP: ffff8801d3727f48 R08: 1ffffffff0d2f37b R09: 1ffff1003a6e4fb6
R10: ffff8801d14fa500 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000020000000
FS:  00007ff06dcc2700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 00000001c4448000 CR4: 00000000001426e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 00000000000b0602
Call Trace:
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007ff06dcc1c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000078
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9
RDX: 0000000020ffaffc RSI: 0000000020000000 RDI: 0000000020003ffc
RBP: 000000000000039b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2728
R13: 00000000ffffffff R14: 00007ff06dcc26d4 R15: 0000000000000000
Code: 00 c3 90 66 2e 0f 1f 84 00 00 00 00 00 65 48 8b 1c 25 40 65 01 00 48 8b 9b a0 15 00 00 48 83 eb 03 48 39 d9 73 3c 0f 1f 00 89 01 <31> c0 0f 1f 00 c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 65 48 8b 
RIP: __put_user_4+0x1e/0x30 arch/x86/lib/putuser.S:70 RSP: ffff8801d3727f08
CR2: fffffffffffffff8
---[ end trace 046647e9649d91d5 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..