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: 3332 Comm: syzkaller603004 Not tainted 4.4.111-gc2f631b #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d158df00 task.stack: ffff8800b7da0000
RIP: 0010:[<ffffffff82f9f430>]  [<ffffffff82f9f430>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff82f9f430>]  [<ffffffff82f9f430>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
RSP: 0018:ffff8800b7da7ba8  EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9f429
RDX: 0000000000000000 RSI: ffffffff839fd820 RDI: ffffffff847ea088
RBP: ffff8800b7da7bd8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff10016fb4f40 R12: dffffc0000000000
R13: ffff8801d082ad88 R14: 0000000000000038 R15: 00000000000000b8
FS:  00007fecc2457700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f601d0ae000 CR3: 00000000b3ed4000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff82f9f3a0 ffffffff83cc5820 ffff8800b7cf0000 ffff8801d082ad88
 ffff8801d082ad88 ffff8801d082ad80 ffff8800b7da7c08 ffffffff82f972ee
 ffffffff82f97230 ffffffff843e2760 ffff8800b7cf0ab8 dffffc0000000000
Call Trace:
 [<ffffffff82f972ee>] nf_queue_nf_hook_drop+0xbe/0x1d0 net/netfilter/nf_queue.c:108
 [<ffffffff82f9304b>] nf_unregister_net_hook+0x2ab/0x350 net/netfilter/core.c:154
 [<ffffffff82f93190>] nf_unregister_hook_list net/netfilter/core.c:434 [inline]
 [<ffffffff82f93190>] netfilter_net_exit+0x40/0xb0 net/netfilter/core.c:466
 [<ffffffff82e2ccee>] ops_exit_list.isra.4+0xae/0x150 net/core/net_namespace.c:134
 [<ffffffff82e2e9d1>] setup_net+0x221/0x3e0 net/core/net_namespace.c:303
 [<ffffffff82e30042>] copy_net_ns+0xd2/0x190 net/core/net_namespace.c:369
 [<ffffffff81192f66>] create_new_namespaces+0x2f6/0x610 kernel/nsproxy.c:95
 [<ffffffff8119381e>] unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:190
 [<ffffffff8112c8ea>] SYSC_unshare kernel/fork.c:2068 [inline]
 [<ffffffff8112c8ea>] SyS_unshare+0x3da/0x700 kernel/fork.c:2018
 [<ffffffff83775919>] entry_SYSCALL_64_fastpath+0x16/0x92
Code: a7 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 57 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 4d 5a 2e fe 48 85 
RIP  [<ffffffff82f9f430>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff82f9f430>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
 RSP <ffff8800b7da7ba8>
---[ end trace 73cd027e45bdc6ce ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..