do_sys_open+0x296/0x410 fs/open.c:1081
kasan: GPF could be caused by NULL-ptr deref or user memory access
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
general protection fault: 0000 [#1] PREEMPT SMP KASAN
RIP: 0033:0x466459
Modules linked in:
RSP: 002b:00007f8e350bb188 EFLAGS: 00000246
 ORIG_RAX: 0000000000000101
CPU: 1 PID: 6609 Comm: syz-executor.0 Not tainted 4.14.228-syzkaller #0
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RDX: 000000000004c000 RSI: 0000000020000280 RDI: ffffffffffffff9c
task: ffff8880ab6643c0 task.stack: ffff8880a3528000
RBP: 00007f8e350bb1d0 R08: 0000000000000000 R09: 0000000000000000
RIP: 0010:vhost_umem_interval_tree_iter_first drivers/vhost/vhost.c:53 [inline]
RIP: 0010:vhost_del_umem_range drivers/vhost/vhost.c:971 [inline]
RIP: 0010:vhost_process_iotlb_msg drivers/vhost/vhost.c:1042 [inline]
RIP: 0010:vhost_chr_write_iter drivers/vhost/vhost.c:1071 [inline]
RIP: 0010:vhost_chr_write_iter+0x863/0x10f0 drivers/vhost/vhost.c:1055
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
RSP: 0018:ffff8880a352fc00 EFLAGS: 00010246
R13: 00007fff643e660f R14: 00007f8e350bb300 R15: 0000000000022000
RAX: dffffc0000000000 RBX: ffff888074825400 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff857d92f5 RDI: ffff8880748254c0
RBP: ffffed100e904a91 R08: 0000000000000000 R09: 000000000004067b
R10: ffff8880ab664c98 R11: ffff8880ab6643c0 R12: 0000000000000002
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff110146a5f87
FS:  00007fb45ea8d700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb6868cc0 CR3: 00000000a57d6000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 call_write_iter include/linux/fs.h:1778 [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: 0033:0x466459
RSP: 002b:00007fb45ea8d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466459
RDX: 0000000000000048 RSI: 0000000020001300 RDI: 0000000000000003
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007fffb241f96f R14: 00007fb45ea8d300 R15: 0000000000022000
Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 cd 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 96 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: ffff8880a352fc00
RIP: vhost_del_umem_range drivers/vhost/vhost.c:971 [inline] RSP: ffff8880a352fc00
RIP: vhost_process_iotlb_msg drivers/vhost/vhost.c:1042 [inline] RSP: ffff8880a352fc00
RIP: vhost_chr_write_iter drivers/vhost/vhost.c:1071 [inline] RSP: ffff8880a352fc00
RIP: vhost_chr_write_iter+0x863/0x10f0 drivers/vhost/vhost.c:1055 RSP: ffff8880a352fc00
---[ end trace 2b67b4962d4afc1f ]---