kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 5706 Comm: syzkaller251643 Not tainted 4.15.0-rc4-next-20171220+ #77
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__fire_sched_in_preempt_notifiers kernel/sched/core.c:2534 [inline]
RIP: 0010:fire_sched_in_preempt_notifiers kernel/sched/core.c:2540 [inline]
RIP: 0010:finish_task_switch+0x42d/0x740 kernel/sched/core.c:2670
RSP: 0018:ffff8801d2be7a00 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff8801db32c900 RCX: 1bd5a00000000022
RDX: 0000000000000000 RSI: 1ffff1003a57cef0 RDI: dead000000000110
RBP: ffff8801d2be7ab0 R08: 1ffff1003a3cabeb R09: 0000000000000000
R10: ffff8801d2be79d8 R11: 0000000000000000 R12: ffff8801d1d480c0
R13: 1ffff1003a57cf45 R14: dffffc0000000000 R15: dead000000000100
FS:  00007fc31dbcd700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc3bcd24db8 CR3: 00000001d9a86004 CR4: 00000000001626e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 context_switch kernel/sched/core.c:2803 [inline]
 __schedule+0x8f3/0x2060 kernel/sched/core.c:3376
 schedule+0xf5/0x430 kernel/sched/core.c:3435
 exit_to_usermode_loop+0x1d1/0x2f0 arch/x86/entry/common.c:151
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x94/0x96
RIP: 0033:0x4498e7
RSP: 002b:00007fc31dbccd18 EFLAGS: 00000206 ORIG_RAX: 000000000000001c
RAX: 0000000000000000 RBX: 00007fc31dbcd700 RCX: 00000000004498e7
RDX: 0000000000000004 RSI: 00000000007fb000 RDI: 00007fc31d3cd000
RBP: 0000000000000000 R08: 230f000000000000 R09: a0000c35f8210fc8
R10: 4966350ff8230f00 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffec4f49d9f R14: 00007fc31dbcd9c0 R15: 0000000000000000
Code: ff 11 4c 89 f9 48 c1 e9 03 42 80 3c 31 00 0f 85 1b 02 00 00 4d 8b 3f 4d 85 ff 0f 84 c0 fd ff ff 49 8d 7f 10 48 89 f9 48 c1 e9 03 <42> 80 3c 31 00 74 ae e8 a7 cc 5b 00 eb a7 4c 89 fe 4c 89 e7 e8 
RIP: __fire_sched_in_preempt_notifiers kernel/sched/core.c:2534 [inline] RSP: ffff8801d2be7a00
RIP: fire_sched_in_preempt_notifiers kernel/sched/core.c:2540 [inline] RSP: ffff8801d2be7a00
RIP: finish_task_switch+0x42d/0x740 kernel/sched/core.c:2670 RSP: ffff8801d2be7a00
---[ end trace a2871d4b844a9258 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..