FAT-fs (loop3): error, fat_get_cluster: invalid cluster chain (i_pos 0)
FAT-fs (loop3): Filesystem has been set read-only
FAT-fs (loop3): error, fat_get_cluster: invalid cluster chain (i_pos 0)
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 0 PID: 11182 Comm: syz-executor3 Not tainted 4.18.0-rc8+ #181
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vsscanf+0x3c1/0x2af0 lib/vsprintf.c:2966
Code: fa 44 89 ee bf 6e 00 00 00 e8 3b 7b d4 fa 41 80 fd 6e 0f 84 ce 02 00 00 e8 5c 7a d4 fa 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:ffff8801a9ebf0e0 EFLAGS: 00010246
isofs_fill_super: bread failed, dev=loop4, iso_blknum=60, block=120
RAX: 0000000000000000 RBX: ffffffff8785bf81 RCX: ffffc90003a2a000
RDX: 0000000000000000 RSI: ffffffff86a79df4 RDI: 0000000000000001
RBP: ffff8801a9ebf2b0 R08: ffff8801d3054680 R09: ffff8801a9ebf4a4
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8785bf81
R13: 0000000000000064 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007ff62719a700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff627136db8 CR3: 000000017ef2f000 CR4: 00000000001406f0
DR0: 00000000200001c0 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sscanf+0xab/0xe0 lib/vsprintf.c:3172
 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
 mount_fs+0xae/0x328 fs/super.c:1277
 vfs_kern_mount.part.34+0xdc/0x4e0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2518 [inline]
 do_mount+0x581/0x30e0 fs/namespace.c:2848
 ksys_mount+0x12d/0x140 fs/namespace.c:3064
 __do_sys_mount fs/namespace.c:3078 [inline]
 __se_sys_mount fs/namespace.c:3075 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456d89
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007ff627199c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff62719a6d4 RCX: 0000000000456d89
RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00000000009300a0 R08: 00000000200001c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d1f90 R14: 00000000004c76c6 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 798b2c0a7441638b ]---
RIP: 0010:vsscanf+0x3c1/0x2af0 lib/vsprintf.c:2966
Code: fa 44 89 ee bf 6e 00 00 00 e8 3b 7b d4 fa 41 80 fd 6e 0f 84 ce 02 00 00 e8 5c 7a d4 fa 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:ffff8801a9ebf0e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff8785bf81 RCX: ffffc90003a2a000
RDX: 0000000000000000 RSI: ffffffff86a79df4 RDI: 0000000000000001
RBP: ffff8801a9ebf2b0 R08: ffff8801d3054680 R09: ffff8801a9ebf4a4
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8785bf81
R13: 0000000000000064 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007ff62719a700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff627136db8 CR3: 000000017ef2f000 CR4: 00000000001406f0
DR0: 00000000200001c0 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400