RBP: ffff88807b327ea0 R08: 0000000000000000 R09: ffffed100f664fd7
R10: ffff88807b327ebf R11: ffff8880a1f90000 R12: 0000000020000000
R13: 00007ffffffff000 R14: 0000000020000020 R15: 0000000000000000
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:112 [inline]
 _copy_to_user+0xaa/0xd0 lib/usercopy.c:28
 copy_to_user include/linux/uaccess.h:155 [inline]
 SYSC_getitimer kernel/time/itimer.c:115 [inline]
 SyS_getitimer+0xbd/0xd0 kernel/time/itimer.c:107
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 18020 Comm: syz-executor.1 Not tainted 4.14.268-syzkaller #0
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
task: ffff88808d63c2c0 task.stack: ffff888096db8000
RIP: 0033:0x7f5de3c73049
RIP: 0010:vhost_umem_interval_tree_iter_first drivers/vhost/vhost.c:53 [inline]
RIP: 0010:vhost_del_umem_range drivers/vhost/vhost.c:977 [inline]
RIP: 0010:vhost_process_iotlb_msg drivers/vhost/vhost.c:1048 [inline]
RIP: 0010:vhost_chr_write_iter drivers/vhost/vhost.c:1077 [inline]
RIP: 0010:vhost_chr_write_iter+0x873/0x1100 drivers/vhost/vhost.c:1061
RSP: 002b:00007f5de25e8168 EFLAGS: 00000246
RSP: 0018:ffff888096dbfc00 EFLAGS: 00010246
 ORIG_RAX: 0000000000000024
RAX: ffffffffffffffda RBX: 00007f5de3d85f60 RCX: 00007f5de3c73049
RAX: dffffc0000000000 RBX: ffff8880885e2b00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000001
RDX: 0000000000000002 RSI: ffffffff857ebbe5 RDI: ffff8880885e2bc0
RBP: 00007f5de25e81d0 R08: 0000000000000000 R09: 0000000000000000
RBP: ffffed10110bc571 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R10: 0000000000000002 R11: ffff88808d63c2c0 R12: 0000000000000002
R13: 00007ffd1012907f R14: 00007f5de25e8300 R15: 0000000000022000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff11012db7f87
FS:  00007fb421a28700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc55883a000 CR3: 00000000a37b9000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 call_write_iter include/linux/fs.h:1780 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x44c/0x630 fs/read_write.c:482
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fb4230b3049
RSP: 002b:00007fb421a28168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb4231c5f60 RCX: 00007fb4230b3049
RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 00007fb42310d08d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed64bb3cf R14: 00007fb421a28300 R15: 0000000000022000
Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 c6 06 00 00 4c 8b ab c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e9 48 c1 e9 03 <80> 3c 01 00 0f 85 8f 06 00 00 49 8b 6d 00 48 85 ed 0f 84 e4 03 
RIP: vhost_umem_interval_tree_iter_first drivers/vhost/vhost.c:53 [inline] RSP: ffff888096dbfc00
RIP: vhost_del_umem_range drivers/vhost/vhost.c:977 [inline] RSP: ffff888096dbfc00
RIP: vhost_process_iotlb_msg drivers/vhost/vhost.c:1048 [inline] RSP: ffff888096dbfc00
RIP: vhost_chr_write_iter drivers/vhost/vhost.c:1077 [inline] RSP: ffff888096dbfc00
RIP: vhost_chr_write_iter+0x873/0x1100 drivers/vhost/vhost.c:1061 RSP: ffff888096dbfc00
---[ end trace 9e1fc02f8210bc2a ]---
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	df 48 89             	fisttps -0x77(%rax)
   3:	f9                   	stc
   4:	48 c1 e9 03          	shr    $0x3,%rcx
   8:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
   c:	0f 85 c6 06 00 00    	jne    0x6d8
  12:	4c 8b ab c0 00 00 00 	mov    0xc0(%rbx),%r13
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 e9             	mov    %r13,%rcx
  26:	48 c1 e9 03          	shr    $0x3,%rcx
* 2a:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1) <-- trapping instruction
  2e:	0f 85 8f 06 00 00    	jne    0x6c3
  34:	49 8b 6d 00          	mov    0x0(%r13),%rbp
  38:	48 85 ed             	test   %rbp,%rbp
  3b:	0f                   	.byte 0xf
  3c:	84 e4                	test   %ah,%ah
  3e:	03                   	.byte 0x3