VMExit: intr_info=00000000 errcode=00000000 ilen=00000000
        reason=80000021 qualification=0000000000000000
IDTVectoring: info=00000000 errcode=00000000
TSC Offset = 0xffffff3b9305c15b
EPT pointer = 0x00000001d096501e
BUG: unable to handle kernel NULL pointer dereference at 00000000000000fc
PGD 1b704b067 P4D 1b704b067 PUD 1b230c067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 24983 Comm: syz-executor4 Not tainted 4.16.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
RSP: 0018:ffff88018d64f0b8 EFLAGS: 00010246
RAX: ffff8800303a3762 RBX: 0000000000000282 RCX: 0000000000000000
RDX: ffffea0000c0e8c0 RSI: ffffea0000c0e8df RDI: 0000000000000282
RBP: ffff88018d64f0f0 R08: ffff8801c5bece78 R09: 0000000000000006
R10: ffff8801c5bec640 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8800303a3762 R15: ffffffff88b18760
FS:  00007f8925439700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000fc CR3: 00000001b2fbb000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 quarantine_reduce+0x141/0x170 mm/kasan/quarantine.c:259
 kasan_kmalloc+0x99/0xe0 mm/kasan/kasan.c:538
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 slab_post_alloc_hook mm/slab.h:444 [inline]
 slab_alloc_node mm/slab.c:3335 [inline]
 kmem_cache_alloc_node_trace+0x139/0x770 mm/slab.c:3661
 __do_kmalloc_node mm/slab.c:3681 [inline]
 __kmalloc_node+0x33/0x70 mm/slab.c:3689
 kmalloc_node include/linux/slab.h:554 [inline]
 kvmalloc_node+0x6b/0x100 mm/util.c:419
 kvmalloc include/linux/mm.h:550 [inline]
 kvzalloc include/linux/mm.h:558 [inline]
 kvm_arch_create_memslot+0xa3/0x4e0 arch/x86/kvm/x86.c:8865
 __kvm_set_memory_region+0x1d1b/0x2e50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:988
 kvm_set_memory_region+0x2e/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1060
 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1072 [inline]
 kvm_vm_ioctl+0x668/0x1d90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2959
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 SYSC_ioctl fs/ioctl.c:708 [inline]
 SyS_ioctl+0x24/0x30 fs/ioctl.c:706
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455187
RSP: 002b:00007f8925437098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000000455187
RDX: 00007f8925437510 RSI: 000000004020ae46 RDI: 0000000000000017
RBP: 0000000020fee000 R08: 0000000000000001 R09: 0000000020000000
R10: 0000000000000017 R11: 0000000000000246 R12: 00000000fec00000
R13: 0000000000000017 R14: 00000000006fca48 R15: 0000000000000000
Code: 55 48 89 e5 41 57 49 c7 c7 60 87 b1 88 41 56 41 55 41 54 49 89 f4 53 48 83 ec 10 48 89 7d c8 4d 89 e5 4d 85 e4 0f 84 c8 00 00 00 <49> 63 95 fc 00 00 00 4c 8b 30 48 29 d0 49 83 3f 00 48 89 c6 0f 
RIP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163 RSP: ffff88018d64f0b8
CR2: 00000000000000fc
---[ end trace 83825a04e7cde51b ]---