audit: type=1400 audit(1520456083.701:67): avc:  denied  { execute } for  pid=8563 comm="syz-executor0" path="pipe:[22649]" dev="pipefs" ino=22649 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=fifo_file permissive=1
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: 2170 Comm: udevd Not tainted 4.16.0-rc4+ #344
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:native_write_cr4+0x4/0x10 arch/x86/include/asm/special_insns.h:76
RSP: 0018:ffff8801db307ca8 EFLAGS: 00010006
RAX: ffff8801ce2ce2c0 RBX: 00000000001606e0 RCX: ffffffff811a5f52
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 00000000001606e0
RBP: ffff8801db307ca8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000006
R13: ffff8801ce2ce2c0 R14: ffff8801db31d130 R15: ffff8801db31d130
FS:  00007f11a52667a0(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f11a526d000 CR3: 00000001ce261005 CR4: 00000000001626e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __write_cr4 arch/x86/include/asm/paravirt.h:77 [inline]
 __cr4_set arch/x86/include/asm/tlbflush.h:254 [inline]
 cr4_clear_bits arch/x86/include/asm/tlbflush.h:277 [inline]
 kvm_cpu_vmxoff arch/x86/kvm/vmx.c:3651 [inline]
 hardware_disable+0x34a/0x4b0 arch/x86/kvm/vmx.c:3657
 kvm_arch_hardware_disable+0x35/0xd0 arch/x86/kvm/x86.c:8281
 hardware_disable_nolock+0x30/0x40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3289
 flush_smp_call_function_queue+0x1f4/0x570 kernel/smp.c:243
 generic_smp_call_function_single_interrupt+0x13/0x30 kernel/smp.c:192
 smp_call_function_single_interrupt+0x103/0x640 arch/x86/kernel/smp.c:295
 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:879
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x5e/0xc0 kernel/locking/spinlock.c:184
RSP: 0018:ffff8801ce2d7980 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04
RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 0000000000000000
RDX: 1ffffffff0dd9325 RSI: 0000000000000001 RDI: 0000000000000286
RBP: ffff8801ce2d7990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801ce11f080
R13: ffff8801ce2d7a68 R14: dffffc0000000000 R15: ffffed0039c5af6d
 spin_unlock_irqrestore include/linux/spinlock.h:365 [inline]
 ep_poll+0xa25/0x11d0 fs/eventpoll.c:1811
 SYSC_epoll_wait fs/eventpoll.c:2186 [inline]
 SyS_epoll_wait+0x167/0x1c0 fs/eventpoll.c:2151
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f11a497a943
RSP: 002b:00007ffd8403c468 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f11a497a943
RDX: 0000000000000008 RSI: 00007ffd8403c560 RDI: 000000000000000a
RBP: 0000000001deaa30 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000001de35c0 R15: 0000000001dd5030
Code: 0f 1f 80 00 00 00 00 55 48 89 e5 0f 20 d8 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 0f 22 df 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 <0f> 22 e7 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 44 0f 20 c0 5d 
RIP: native_write_cr4+0x4/0x10 arch/x86/include/asm/special_insns.h:76 RSP: ffff8801db307ca8
---[ end trace 139ad46192723baa ]---