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: 5753 Comm: syz-executor2 Not tainted 4.4.112-g3fc4284 #32
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c5978000 task.stack: ffff8801d3b70000
RIP: 0010:[<ffffffff82f9fc10>]  [<ffffffff82f9fc10>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff82f9fc10>]  [<ffffffff82f9fc10>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
RSP: 0018:ffff8801d3b77998  EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9fc09
RDX: 0000000000010000 RSI: ffffc90001f0e000 RDI: ffffffff847ea4c8
RBP: ffff8801d3b779c8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff1003a76eefe R12: dffffc0000000000
R13: ffff8801c5ccef08 R14: 0000000000000038 R15: 00000000000000b8
FS:  00007f545d344700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe72fe5e10 CR3: 00000001d3a20000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff82f9fb80 ffffffff83cc5d20 ffff8800ac85da00 ffff8801c5ccef08
 ffff8801c5ccef08 ffff8801c5ccef00 ffff8801d3b779f8 ffffffff82f97ace
 ffffffff82f97a10 ffffffff843e2760 ffff8800ac85e4b8 dffffc0000000000
Call Trace:
 [<ffffffff82f97ace>] nf_queue_nf_hook_drop+0xbe/0x1d0 net/netfilter/nf_queue.c:108
 [<ffffffff82f9382b>] nf_unregister_net_hook+0x2ab/0x350 net/netfilter/core.c:154
 [<ffffffff82f93970>] nf_unregister_hook_list net/netfilter/core.c:434 [inline]
 [<ffffffff82f93970>] netfilter_net_exit+0x40/0xb0 net/netfilter/core.c:466
 [<ffffffff82e2d4ce>] ops_exit_list.isra.4+0xae/0x150 net/core/net_namespace.c:134
 [<ffffffff82e2f1b1>] setup_net+0x221/0x3e0 net/core/net_namespace.c:303
 [<ffffffff82e30822>] 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
 [<ffffffff837761d9>] entry_SYSCALL_64_fastpath+0x16/0x92
Code: a3 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 47 02 3c fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f4 01 00 00 49 8b 1e e8 3d 52 2e fe 48 85 
RIP  [<ffffffff82f9fc10>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff82f9fc10>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
 RSP <ffff8801d3b77998>
---[ end trace cb63f41d44fcb7f0 ]---