9pnet_virtio: no channels available for device (null)
9pnet: p9_fd_create_tcp (4453): problem connecting socket to 127.0.0.1
kasan: CONFIG_KASAN_INLINE enabled
9pnet: p9_fd_create_tcp (4454): problem connecting socket to 127.0.0.1
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 1 PID: 4453 Comm: syz-executor179 Not tainted 4.18.0-rc4-next-20180713+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vsscanf+0x3c1/0x2af0 lib/vsprintf.c:2994
Code: f9 44 89 ee bf 6e 00 00 00 e8 0b 48 e2 f9 41 80 fd 6e 0f 84 ce 02 00 00 e8 2c 47 e2 f9 4c 89 f0 4c 89 f2 48 c1 e8 03 83 e2 07 <42> 0f b6 04 38 38 d0 7f 08 84 c0 0f 85 e8 1c 00 00 45 0f b6 26 31 
RSP: 0018:ffff8801af0b7190 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff8883ff41 RCX: ffffffff879a2915
RDX: 0000000000000000 RSI: ffffffff879a2924 RDI: 0000000000000001
RBP: ffff8801af0b7360 R08: ffff8801af286680 R09: ffff8801af0b7554
R10: 000000009700bb54 R11: ffff8801daf236b3 R12: ffffffff8883ff41
R13: 0000000000000064 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007ff6b53fb700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000100 CR3: 00000001b814d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sscanf+0xab/0xe0 lib/vsprintf.c:3200
 valid_ipaddr4 net/9p/trans_fd.c:903 [inline]
 p9_fd_create_tcp+0x113/0x8a0 net/9p/trans_fd.c:943
 p9_client_create+0x8ed/0x1770 net/9p/client.c:1063
 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400
 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135
 legacy_get_tree+0x118/0x440 fs/fs_context.c:659
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743
 do_new_mount fs/namespace.c:2567 [inline]
 do_mount+0x6c1/0x1fb0 fs/namespace.c:2889
 ksys_mount+0x12d/0x140 fs/namespace.c:3105
 __do_sys_mount fs/namespace.c:3119 [inline]
 __se_sys_mount fs/namespace.c:3116 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3116
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4456d9
Code: e8 7c b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007ff6b53fada8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004456d9
RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00000000006dac20 R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 63743d736e617274 R14: 2e302e302e373231 R15: 0000000000000003
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace a87567c6b33221b3 ]---
RIP: 0010:vsscanf+0x3c1/0x2af0 lib/vsprintf.c:2994
Code: f9 44 89 ee bf 6e 00 00 00 e8 0b 48 e2 f9 41 80 fd 6e 0f 84 ce 02 00 00 e8 2c 47 e2 f9 4c 89 f0 4c 89 f2 48 c1 e8 03 83 e2 07 <42> 0f b6 04 38 38 d0 7f 08 84 c0 0f 85 e8 1c 00 00 45 0f b6 26 31 
RSP: 0018:ffff8801af0b7190 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff8883ff41 RCX: ffffffff879a2915
RDX: 0000000000000000 RSI: ffffffff879a2924 RDI: 0000000000000001
RBP: ffff8801af0b7360 R08: ffff8801af286680 R09: ffff8801af0b7554
R10: 000000009700bb54 R11: ffff8801daf236b3 R12: ffffffff8883ff41
R13: 0000000000000064 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007ff6b53fb700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000100 CR3: 00000001b814d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400