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
CPU: 0 PID: 5401 Comm: syz-executor1 Not tainted 4.18.0-rc8-next-20180806+ #32
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__fire_sched_out_preempt_notifiers kernel/sched/core.c:2497 [inline]
RIP: 0010:fire_sched_out_preempt_notifiers kernel/sched/core.c:2505 [inline]
RIP: 0010:prepare_task_switch kernel/sched/core.c:2611 [inline]
RIP: 0010:context_switch kernel/sched/core.c:2788 [inline]
RIP: 0010:__schedule+0x1061/0x1ec0 kernel/sched/core.c:3471
Code: 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 0f 85 ea 08 00 00 4d 8b 6d 00 4d 85 ed 0f 84 6b f6 ff ff 49 8d 7d 10 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 a6 e8 93 26 04 fb eb 9f 4c 89 e6 48 89 df e8 46
RSP: 0018:ffff8801973471a8 EFLAGS: 00010806
RAX: 1bd5a00000000022 RBX: ffff88019981e440 RCX: 1ffff100320f6aaf
RDX: 0000000040000002 RSI: 0000000000000000 RDI: dead000000000110
RBP: ffff880197347378 R08: ffff88019981e440 R09: fffff520029da047
R10: fffff520029da047 R11: ffffc90014ed023b R12: ffffffff87e75e00
R13: dead000000000100 R14: dffffc0000000000 R15: ffff8801db02ca40
FS:  00007fcea9abb700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020fe8010 CR3: 00000001c8025000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 schedule+0xfb/0x450 kernel/sched/core.c:3515
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue_me+0x3f9/0x840 kernel/futex.c:2530
 futex_wait+0x45b/0xa20 kernel/futex.c:2645
 do_futex+0x336/0x27d0 kernel/futex.c:3527
 __do_sys_futex kernel/futex.c:3587 [inline]
 __se_sys_futex kernel/futex.c:3555 [inline]
 __x64_sys_futex+0x472/0x6a0 kernel/futex.c:3555
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456cb9
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcea9abacf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000009300a8 RCX: 0000000000456cb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000009300a8
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000009300ac
R13: 00007fff66ccfd7f R14: 00007fcea9abb9c0 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 14c6ff38e7d3cfda ]---
RIP: 0010:__fire_sched_out_preempt_notifiers kernel/sched/core.c:2497 [inline]
RIP: 0010:fire_sched_out_preempt_notifiers kernel/sched/core.c:2505 [inline]
RIP: 0010:prepare_task_switch kernel/sched/core.c:2611 [inline]
RIP: 0010:context_switch kernel/sched/core.c:2788 [inline]
RIP: 0010:__schedule+0x1061/0x1ec0 kernel/sched/core.c:3471
Code: 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 0f 85 ea 08 00 00 4d 8b 6d 00 4d 85 ed 0f 84 6b f6 ff ff 49 8d 7d 10 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 a6 e8 93 26 04 fb eb 9f 4c 89 e6 48 89 df e8 46
RSP: 0018:ffff8801973471a8 EFLAGS: 00010806
RAX: 1bd5a00000000022 RBX: ffff88019981e440 RCX: 1ffff100320f6aaf
RDX: 0000000040000002 RSI: 0000000000000000 RDI: dead000000000110
RBP: ffff880197347378 R08: ffff88019981e440 R09: fffff520029da047
R10: fffff520029da047 R11: ffffc90014ed023b R12: ffffffff87e75e00
R13: dead000000000100 R14: dffffc0000000000 R15: ffff8801db02ca40
FS:  00007fcea9abb700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020fe8010 CR3: 00000001c8025000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400