nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
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: 1 PID: 15212 Comm: syz-executor3 Not tainted 4.19.0-rc2-next-20180904+ #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:open_ubi fs/ubifs/super.c:1964 [inline]
RIP: 0010:ubifs_mount+0x1a0/0x66f0 fs/ubifs/super.c:2152
Code: 49 89 c7 48 89 c6 e8 3f 09 0f ff 49 81 ff 00 f0 ff ff 0f 86 91 03 00 00 e8 fd 07 0f ff 48 89 d8 48 89 da 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 1e 19 00 00 44 0f b6 2b bf
RSP: 0018:ffff8801861d7660 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90003271000
RDX: 0000000000000000 RSI: ffffffff826dce73 RDI: 0000000000000007
RBP: ffff8801861d7b88 R08: ffff88018f3dc040 R09: ffffed003b6246de
R10: ffffed003b6246de R11: ffff8801db1236f3 R12: ffff8801861d7b60
R13: dffffc0000000000 R14: ffff8801bbba95c8 R15: ffffffffffffffea
FS:  00007f2420a17700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0ac59c8000 CR3: 00000001d1831000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 legacy_get_tree+0x131/0x460 fs/fs_context.c:732
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1746
 do_new_mount fs/namespace.c:2627 [inline]
 do_mount+0x6f9/0x1e30 fs/namespace.c:2951
 ksys_mount+0x12d/0x140 fs/namespace.c:3167
 __do_sys_mount fs/namespace.c:3181 [inline]
 __se_sys_mount fs/namespace.c:3178 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3178
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457099
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:00007f2420a16c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2420a176d4 RCX: 0000000000457099
RDX: 0000000020fdb000 RSI: 0000000020000380 RDI: 0000000020000000
RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d3210 R14: 00000000004c81c6 R15: 0000000000000001
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 8c387455d6e67fb9 ]---
RIP: 0010:open_ubi fs/ubifs/super.c:1964 [inline]
RIP: 0010:ubifs_mount+0x1a0/0x66f0 fs/ubifs/super.c:2152
Code: 49 89 c7 48 89 c6 e8 3f 09 0f ff 49 81 ff 00 f0 ff ff 0f 86 91 03 00 00 e8 fd 07 0f ff 48 89 d8 48 89 da 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 1e 19 00 00 44 0f b6 2b bf
RSP: 0018:ffff8801861d7660 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90003271000
RDX: 0000000000000000 RSI: ffffffff826dce73 RDI: 0000000000000007
RBP: ffff8801861d7b88 R08: ffff88018f3dc040 R09: ffffed003b6246de
R10: ffffed003b6246de R11: ffff8801db1236f3 R12: ffff8801861d7b60
R13: dffffc0000000000 R14: ffff8801bbba95c8 R15: ffffffffffffffea
FS:  00007f2420a17700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0ac59c8000 CR3: 00000001d1831000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400