general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 14135 Comm: syz-executor.5 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 task: ffff888099c40300 task.stack: ffff88808c8e8000 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: 0018:ffff88808c8efc00 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888087464040 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff857f16f5 RDI: ffff888087464100 RBP: ffffed1010e8c819 R08: 0000000000000000 R09: 0000000000040681 R10: ffff888099c40bd8 R11: ffff888099c40300 R12: 0000000000000002 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff1101191df87 FS: 00007fb023124700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb023103718 CR3: 00000000957b5000 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+0x5e/0xd3 RIP: 0033:0x7fb024bb20f9 RSP: 002b:00007fb023124168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb024cd1f80 RCX: 00007fb024bb20f9 RDX: 0000000000000048 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 00007fb024c0dae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff75a22f9f R14: 00007fb023124300 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: ffff88808c8efc00 RIP: vhost_del_umem_range drivers/vhost/vhost.c:977 [inline] RSP: ffff88808c8efc00 RIP: vhost_process_iotlb_msg drivers/vhost/vhost.c:1048 [inline] RSP: ffff88808c8efc00 RIP: vhost_chr_write_iter drivers/vhost/vhost.c:1077 [inline] RSP: ffff88808c8efc00 RIP: vhost_chr_write_iter+0x873/0x1100 drivers/vhost/vhost.c:1061 RSP: ffff88808c8efc00 ---[ end trace 6c37b59322f204aa ]--- ---------------- 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