kernel msg: ebtables bug: please report to author: Wrong len argument
BUG: unable to handle kernel NULL pointer dereference at 00000000000000fd
IP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
PGD 1c9f07067 P4D 1c9f07067 PUD 1949ad067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 12996 Comm: syz-executor7 Not tainted 4.16.0-rc6+ #287
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
RSP: 0018:ffff8801cafd7350 EFLAGS: 00010246
IPVS: stopping master sync thread 3824 ...
RAX: ffff8801be7a2d40 RBX: 0000000000000282 RCX: 0000000000000000
RDX: ffffea0006f9e880 RSI: ffffea0006f1c09f RDI: 0000000000000282
RBP: ffff8801cafd7388 R08: 0000000000000000 R09: 1ffff100395fad13
R10: ffff8801cafd6860 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000001 R14: ffff8801be7a2d40 R15: ffffffff88512720
FS:  00007f570293b700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
IPVS: set_ctl: invalid protocol: 98 0.0.0.6:20000 lc
CR2: 00000000000000fd CR3: 00000001cb865003 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kernel msg: ebtables bug: please report to author: Wrong len argument
Call Trace:
 quarantine_reduce+0x141/0x170 mm/kasan/quarantine.c:259
 kasan_kmalloc+0xca/0xe0 mm/kasan/kasan.c:537
 __do_kmalloc mm/slab.c:3705 [inline]
 __kmalloc+0x162/0x760 mm/slab.c:3714
IPVS: set_ctl: invalid protocol: 98 0.0.0.6:20000 lc
 kmalloc include/linux/slab.h:517 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 __proc_create+0x217/0x890 fs/proc/generic.c:366
 proc_create_data+0x76/0x180 fs/proc/generic.c:488
 proc_create+0x2f/0x40 fs/proc/generic.c:508
 fib_proc_init+0xe0/0x1a0 net/ipv4/fib_trie.c:2751
 fib_net_init+0x283/0x3f0 net/ipv4/fib_frontend.c:1342
 ops_init+0xec/0x500 net/core/net_namespace.c:127
kernel msg: ebtables bug: please report to author: Wrong len argument
 setup_net+0x37a/0x8c0 net/core/net_namespace.c:312
IPVS: set_ctl: invalid protocol: 98 0.0.0.6:20000 lc
IPVS: stopping master sync thread 13042 ...
 copy_net_ns+0x272/0x430 net/core/net_namespace.c:435
IPVS: sync thread started: state = MASTER, mcast_ifn = gre0, syncid = 0, id = 0
 create_new_namespaces+0x425/0x880 kernel/nsproxy.c:107
 unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:206
 SYSC_unshare kernel/fork.c:2407 [inline]
 SyS_unshare+0x653/0xfa0 kernel/fork.c:2357
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x454e79
RSP: 002b:00007f570293ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f570293b6d4 RCX: 0000000000454e79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000060000000
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000006a5 R14: 00000000006fc018 R15: 0000000000000000
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 49 c7 c7 20 27 51 88 53 49 89 f4 48 83 ec 10 48 89 7d c8 4d 85 e4 4d 89 e5 0f 84 c8 00 00 00 <49> 63 95 fc 00 00 00 4c 8b 30 48 29 d0 49 83 3f 00 48 89 c6 0f 
RIP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163 RSP: ffff8801cafd7350
CR2: 00000000000000fd
---[ end trace 77000bb6133c439c ]---