RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072c04c
R13: 00007ffca1aab2ef R14: 00007f46fe89d9c0 R15: 0000000000000002
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
kobject: 'loop0' (0000000007799739): fill_kobj_path: path = '/devices/virtual/block/loop0'
CPU: 1 PID: 10665 Comm: syz-executor4 Not tainted 4.19.0-rc4-next-20180921+ #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:2486 [inline]
RIP: 0010:fire_sched_in_preempt_notifiers kernel/sched/core.c:2492 [inline]
RIP: 0010:finish_task_switch+0x3a4/0x900 kernel/sched/core.c:2684
Code: 3d 04 00 00 4d 8b bc 24 50 03 00 00 4d 85 ff 0f 84 ab fe ff ff 49 bc 00 00 00 00 00 fc ff df 49 8d 7f 10 48 89 f9 48 c1 e9 03 <42> 80 3c 21 00 0f 85 da 03 00 00 49 8b 4f 10 48 89 ce 48 c1 ee 03
RSP: 0018:ffff88018fcb7198 EFLAGS: 00010a06
kobject: 'loop1' (00000000fc08709e): kobject_uevent_env
RAX: 0000000000000000 RBX: ffff8801dad2cc40 RCX: 1bd5a00000000022
RDX: 0000000000040000 RSI: ffffffff810f018e RDI: dead000000000110
RBP: ffff88018fcb7280 R08: ffff88018aee4100 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8801d5b42640 R14: 0000000000000000 R15: dead000000000100
FS:  00007f46fe89d700(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5387db5ec8 CR3: 00000001c0eaa000 CR4: 00000000001426e0
Call Trace:
kobject: 'loop1' (00000000fc08709e): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'kvm' (000000004f03dbff): kobject_uevent_env
kobject: 'kvm' (000000004f03dbff): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 context_switch kernel/sched/core.c:2833 [inline]
 __schedule+0x874/0x1ed0 kernel/sched/core.c:3479
 preempt_schedule_common+0x1f/0xd0 kernel/sched/core.c:3603
 preempt_schedule+0x4d/0x60 kernel/sched/core.c:3629
 ___preempt_schedule+0x16/0x18
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
 _raw_spin_unlock_irqrestore+0xbb/0xd0 kernel/locking/spinlock.c:184
 try_to_wake_up+0x10a/0x12f0 kernel/sched/core.c:2060
 wake_up_process kernel/sched/core.c:2128 [inline]
 wake_up_q+0xa4/0x100 kernel/sched/core.c:441
 futex_wake+0x61f/0x760 kernel/futex.c:1556
 do_futex+0x2e4/0x26d0 kernel/futex.c:3533
 __do_sys_futex kernel/futex.c:3589 [inline]
 __se_sys_futex kernel/futex.c:3557 [inline]
 __x64_sys_futex+0x472/0x6a0 kernel/futex.c:3557
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457679
Code: 1d 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f46fe89ccf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000072c048 RCX: 0000000000457679
RDX: 0000000000000016 RSI: 0000000000000081 RDI: 000000000072c04c
RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072c04c
R13: 00007ffca1aab2ef R14: 00007f46fe89d9c0 R15: 0000000000000002
Modules linked in:
---[ end trace 07c7632f3fc685e5 ]---
RIP: 0010:__fire_sched_in_preempt_notifiers kernel/sched/core.c:2486 [inline]
RIP: 0010:fire_sched_in_preempt_notifiers kernel/sched/core.c:2492 [inline]
RIP: 0010:finish_task_switch+0x3a4/0x900 kernel/sched/core.c:2684
Code: 3d 04 00 00 4d 8b bc 24 50 03 00 00 4d 85 ff 0f 84 ab fe ff ff 49 bc 00 00 00 00 00 fc ff df 49 8d 7f 10 48 89 f9 48 c1 e9 03 <42> 80 3c 21 00 0f 85 da 03 00 00 49 8b 4f 10 48 89 ce 48 c1 ee 03
kobject: 'kvm' (000000004f03dbff): kobject_uevent_env
RSP: 0018:ffff88018fcb7198 EFLAGS: 00010a06
RAX: 0000000000000000 RBX: ffff8801dad2cc40 RCX: 1bd5a00000000022
RDX: 0000000000040000 RSI: ffffffff810f018e RDI: dead000000000110
RBP: ffff88018fcb7280 R08: ffff88018aee4100 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
kobject: 'kvm' (000000004f03dbff): kobject_uevent_env
R13: ffff8801d5b42640 R14: 0000000000000000 R15: dead000000000100
FS:  00007f46fe89d700(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5387db5ec8 CR3: 00000001c0eaa000 CR4: 00000000001426e0