pktgen: Cannot create thread for cpu 1 (-4)
pktgen: Initialization failed for all threads
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3335 Comm: syzkaller855898 Not tainted 4.4.112-g52c02cf #30
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b3c5c740 task.stack: ffff8801d0798000
RIP: 0010:[<ffffffff82f9fe20>]  [<ffffffff82f9fe20>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff82f9fe20>]  [<ffffffff82f9fe20>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
RSP: 0018:ffff8801d079f998  EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9fe19
RDX: 0000000000000000 RSI: ffffffff839fdb20 RDI: ffffffff847ea508
RBP: ffff8801d079f9c8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff1003a0f3efe R12: dffffc0000000000
R13: ffff8801d0942668 R14: 0000000000000038 R15: 00000000000000b8
FS:  00007fcfc0b5c700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4a324ee000 CR3: 00000001d0998000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff82f9fd90 ffffffff83cc5d20 ffff8800b45a9e00 ffff8801d0942668
 ffff8801d0942668 ffff8801d0942660 ffff8801d079f9f8 ffffffff82f97cde
 ffffffff82f97c20 ffffffff843e2760 ffff8800b45aa8b8 dffffc0000000000
Call Trace:
 [<ffffffff82f97cde>] nf_queue_nf_hook_drop+0xbe/0x1d0 net/netfilter/nf_queue.c:108
 [<ffffffff82f93a3b>] nf_unregister_net_hook+0x2ab/0x350 net/netfilter/core.c:154
 [<ffffffff82f93b80>] nf_unregister_hook_list net/netfilter/core.c:434 [inline]
 [<ffffffff82f93b80>] netfilter_net_exit+0x40/0xb0 net/netfilter/core.c:466
 [<ffffffff82e2d6de>] ops_exit_list.isra.4+0xae/0x150 net/core/net_namespace.c:134
 [<ffffffff82e2f3c1>] setup_net+0x221/0x3e0 net/core/net_namespace.c:303
 [<ffffffff82e30a32>] copy_net_ns+0xd2/0x190 net/core/net_namespace.c:369
 [<ffffffff81192fd6>] create_new_namespaces+0x2f6/0x610 kernel/nsproxy.c:95
 [<ffffffff81193581>] copy_namespaces+0x291/0x320 kernel/nsproxy.c:150
 [<ffffffff81127038>] copy_process+0x1d98/0x6120 kernel/fork.c:1506
 [<ffffffff8112b7e1>] _do_fork+0x151/0xe00 kernel/fork.c:1784
 [<ffffffff8112c567>] SYSC_clone kernel/fork.c:1893 [inline]
 [<ffffffff8112c567>] SyS_clone+0x37/0x50 kernel/fork.c:1887
 [<ffffffff837763d9>] entry_SYSCALL_64_fastpath+0x16/0x92
Code: a2 83 01 00 0f 84 d8 00 00 00 4d 8d 77 38 49 bc 00 00 00 00 00 fc ff df 49 81 c7 b8 00 00 00 e8 37 00 3c fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f4 01 00 00 49 8b 1e e8 2d 50 2e fe 48 85 
RIP  [<ffffffff82f9fe20>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff82f9fe20>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
 RSP <ffff8801d079f998>
---[ end trace 2254878f2fc41877 ]---