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: 3337 Comm: syzkaller208854 Not tainted 4.4.111-g1849cd3 #19
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b4ccaf80 task.stack: ffff8801ccfc0000
RIP: 0010:[<ffffffff82f9f390>]  [<ffffffff82f9f390>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff82f9f390>]  [<ffffffff82f9f390>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
RSP: 0018:ffff8801ccfc7920  EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9f389
RDX: 0000000000000000 RSI: ffffffff839fd820 RDI: ffffffff847ea088
RBP: ffff8801ccfc7950 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff100399f8ef0 R12: dffffc0000000000
R13: ffff8801d113f0c8 R14: 0000000000000038 R15: 00000000000000b8
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f778cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007fe1d87ac000 CR3: 00000001d089c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff82f9f300 ffffffff83cc5820 ffff8801d0561e00 ffff8801d113f0c8
 ffff8801d113f0c8 ffff8801d113f0c0 ffff8801ccfc7980 ffffffff82f9724e
 ffffffff82f97190 ffffffff843e2760 ffff8801d05628b8 dffffc0000000000
Call Trace:
 [<ffffffff82f9724e>] nf_queue_nf_hook_drop+0xbe/0x1d0 net/netfilter/nf_queue.c:108
 [<ffffffff82f92fab>] nf_unregister_net_hook+0x2ab/0x350 net/netfilter/core.c:154
 [<ffffffff82f930f0>] nf_unregister_hook_list net/netfilter/core.c:434 [inline]
 [<ffffffff82f930f0>] netfilter_net_exit+0x40/0xb0 net/netfilter/core.c:466
 [<ffffffff82e2cc4e>] ops_exit_list.isra.4+0xae/0x150 net/core/net_namespace.c:134
 [<ffffffff82e2e931>] setup_net+0x221/0x3e0 net/core/net_namespace.c:303
 [<ffffffff82e2ffa2>] copy_net_ns+0xd2/0x190 net/core/net_namespace.c:369
 [<ffffffff81192f66>] create_new_namespaces+0x2f6/0x610 kernel/nsproxy.c:95
 [<ffffffff81193511>] copy_namespaces+0x291/0x320 kernel/nsproxy.c:150
 [<ffffffff81126fc8>] copy_process+0x1d98/0x6120 kernel/fork.c:1506
 [<ffffffff8112b771>] _do_fork+0x151/0xe00 kernel/fork.c:1784
 [<ffffffff8112c4f7>] SYSC_clone kernel/fork.c:1893 [inline]
 [<ffffffff8112c4f7>] SyS_clone+0x37/0x50 kernel/fork.c:1887
 [<ffffffff81006d84>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff8377722a>] sysenter_flags_fixed+0xd/0x17
Code: a8 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 f7 0a 3c fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f4 01 00 00 49 8b 1e e8 ed 5a 2e fe 48 85 
RIP  [<ffffffff82f9f390>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff82f9f390>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
 RSP <ffff8801ccfc7920>
---[ end trace 03540c4ae4c75385 ]---