do_last fs/namei.c:3428 [inline]
 path_openat+0x628/0x2970 fs/namei.c:3569
kasan: CONFIG_KASAN_INLINE enabled
 do_filp_open+0x179/0x3c0 fs/namei.c:3603
kasan: GPF could be caused by NULL-ptr deref or user memory access
 do_sys_open+0x296/0x410 fs/open.c:1081
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
CPU: 1 PID: 10203 Comm: syz-executor.3 Not tainted 4.14.273-syzkaller #0
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0033:0x7f99bc937049
task: ffff8880a60421c0 task.stack: ffff8880924f8000
RSP: 002b:00007f99bb2ac168 EFLAGS: 00000246
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
 ORIG_RAX: 0000000000000101
RSP: 0018:ffff8880924ffc00 EFLAGS: 00010246
RAX: ffffffffffffffda RBX: 00007f99bca49f60 RCX: 00007f99bc937049
RDX: 000000000004e180 RSI: 0000000020000480 RDI: ffffffffffffff9c
RAX: dffffc0000000000 RBX: ffff888088d64a40 RCX: 0000000000000000
RBP: 00007f99bb2ac1d0 R08: 0000000000000000 R09: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff857ec415 RDI: ffff888088d64b00
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
RBP: ffffed10111ac959 R08: 0000000000000000 R09: 0000000000040693
R13: 00007ffc6d4fc2ff R14: 00007f99bb2ac300 R15: 0000000000022000
R10: ffff8880a6042a98 R11: ffff8880a60421c0 R12: 0000000000000002
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff1101249ff87
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
FS:  00007f2fb41cc700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48c073d998 CR3: 000000009c2bf000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
 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
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
 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
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
RIP: 0033:0x7f2fb5857049
RSP: 002b:00007f2fb41cc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2fb5969f60 RCX: 00007f2fb5857049
RDX: 0000000000000048 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00007f2fb58b108d R08: 0000000000000000 R09: 0000000000000000
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdb42eef7f R14: 00007f2fb41cc300 R15: 0000000000022000
Code: ff 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
df 48 89 f9 48 c1 e9 03 80 3c 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
01 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
00 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
0f 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
85 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
c6 06 00 00 4c 8b ab c0 00 00 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
00 48 b8 00 00 00 00 00 fc ff df 4c 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
89 e9 48 c1 e9 03 <80> 3c 01 00 
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0
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: ffff8880924ffc00
RIP: vhost_del_umem_range drivers/vhost/vhost.c:977 [inline] RSP: ffff8880924ffc00
RIP: vhost_process_iotlb_msg drivers/vhost/vhost.c:1048 [inline] RSP: ffff8880924ffc00
RIP: vhost_chr_write_iter drivers/vhost/vhost.c:1077 [inline] RSP: ffff8880924ffc00
RIP: vhost_chr_write_iter+0x873/0x1100 drivers/vhost/vhost.c:1061 RSP: ffff8880924ffc00
---[ end trace fde9aa04a1e761a0 ]---
hid-generic 0002:0001:0005.0062: unknown main item tag 0x0