__vfs_write+0xe4/0x630 fs/read_write.c:480
kasan: CONFIG_KASAN_INLINE enabled
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
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
CPU: 0 PID: 1797 Comm: syz-executor.4 Not tainted 4.14.296-syzkaller #0
entry_SYSCALL_64_after_hwframe+0x46/0xbb
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
RIP: 0033:0x7f83d010b5a9
task: ffff88809898c2c0 task.stack: ffff888092698000
RSP: 002b:00007f83ce67e168 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: 0000000000000001
RSP: 0018:ffff88809269fc00 EFLAGS: 00010246
RAX: ffffffffffffffda RBX: 00007f83d022bf80 RCX: 00007f83d010b5a9
RDX: 00000000000000a0 RSI: 0000000020000100 RDI: 0000000000000003
RAX: dffffc0000000000 RBX: ffff88808798dc80 RCX: 0000000000000000
RBP: 00007f83ce67e1d0 R08: 0000000000000000 R09: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff857ec2f5 RDI: ffff88808798dd40
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
RBP: ffffed1010f31ba1 R08: 0000000000000000 R09: 0000000000040698
R13: 00007ffc6b6c046f R14: 00007f83ce67e300 R15: 0000000000022000
R10: ffff88809898cb98 R11: ffff88809898c2c0 R12: 0000000000000002
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff110124d3f87
FS: 00007fd4d0ee7700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000090782000 CR4: 00000000003406f0
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: 0033:0x7fd4d29745a9
RSP: 002b:00007fd4d0ee7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd4d2a94f80 RCX: 00007fd4d29745a9
RDX: 0000000000000048 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00007fd4d29cf7b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc501c8eff R14: 00007fd4d0ee7300 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: ffff88809269fc00
RIP: vhost_del_umem_range drivers/vhost/vhost.c:977 [inline] RSP: ffff88809269fc00
RIP: vhost_process_iotlb_msg drivers/vhost/vhost.c:1048 [inline] RSP: ffff88809269fc00
RIP: vhost_chr_write_iter drivers/vhost/vhost.c:1077 [inline] RSP: ffff88809269fc00
RIP: vhost_chr_write_iter+0x873/0x1100 drivers/vhost/vhost.c:1061 RSP: ffff88809269fc00
---[ end trace 6fc25d75f0910e23 ]---
----------------
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