BUG: unable to handle kernel paging request at 000000007b18859a
IP: copy_user_handle_tail+0x31/0x80 arch/x86/lib/usercopy_64.c:69
PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0 
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 11531 Comm: syz-executor5 Not tainted 4.15.0-rc2-next-20171204+ #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 00000000f39a6cbc task.stack: 00000000856340e9
RIP: 0010:copy_user_handle_tail+0x31/0x80 arch/x86/lib/usercopy_64.c:69
RSP: 0018:ffff8801c6ebf098 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 0000000000000000 RCX: ffffffff85164c55
RDX: 000000000000093c RSI: ffffc90003acc000 RDI: ffff8801c78f3500
RBP: ffff8801c6ebf0c0 R08: 003074726f70006e R09: 0000000000001b4e
R10: 0000000000000002 R11: ffffed0038f1e6a1 R12: 000000000000000f
R13: ffff8801c78f3500 R14: 0000000020000001 R15: 000000002000006e
FS:  00007f0402aaf700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 00000001d034a000 CR4: 00000000001426f0
DR0: 0000000020000000 DR1: 0000000020000008 DR2: 0000000020001000
DR3: 0000000020001000 DR6: 00000000ffff0ff1 DR7: 00000000000b0602
Call Trace:
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
 __copy_from_user include/linux/uaccess.h:75 [inline]
 __kvm_read_guest_page+0x81/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1711
 kvm_vcpu_read_guest_page+0x44/0x60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1731
 kvm_fetch_guest_virt+0x10e/0x180 arch/x86/kvm/x86.c:4506
 __do_insn_fetch_bytes+0x5e9/0x8a0 arch/x86/kvm/emulate.c:881
 x86_decode_insn+0x13d5/0x4990 arch/x86/kvm/emulate.c:5035
 x86_emulate_instruction+0x5e2/0x1ad0 arch/x86/kvm/x86.c:5732
 emulate_instruction arch/x86/include/asm/kvm_host.h:1164 [inline]
 handle_io+0xa4/0xd0 arch/x86/kvm/vmx.c:6028
 vmx_handle_exit+0x25d/0x1ce0 arch/x86/kvm/vmx.c:8893
 vcpu_enter_guest arch/x86/kvm/x86.c:7084 [inline]
 vcpu_run arch/x86/kvm/x86.c:7146 [inline]
 kvm_arch_vcpu_ioctl_run+0x1cb4/0x5c60 arch/x86/kvm/x86.c:7314
 kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2555
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007f0402aaec58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000019
RBP: 000000000000021e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f0370
R13: 00000000ffffffff R14: 00007f0402aaf6d4 R15: 0000000000000000
Code: 41 56 41 55 41 54 41 89 d4 53 49 89 fd 49 89 f7 e8 f5 ef 59 fc 45 85 e4 74 3d e8 eb ef 59 fc 0f 1f 00 31 db 4d 8d 77 01 45 8a 3f <0f> 1f 00 85 db 75 2a e8 d3 ef 59 fc 0f 1f 00 45 88 7d 00 0f 1f 
RIP: copy_user_handle_tail+0x31/0x80 arch/x86/lib/usercopy_64.c:69 RSP: ffff8801c6ebf098
CR2: fffffffffffffff8
---[ end trace b6b1b112d24baa05 ]---