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: 0 PID: 3764 Comm: syzkaller735187 Not tainted 4.4.115-g55a366596 #15
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bb874800 task.stack: ffff8801d8e30000
RIP: 0010:[<ffffffff82f9d210>]  [<ffffffff82f9d210>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff82f9d210>]  [<ffffffff82f9d210>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
RSP: 0018:ffff8801d8e37b30  EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9d209
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84418180
RBP: ffff8801d8e37b60 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff83844400 R11: 1ffff1003b1c6f32 R12: dffffc0000000000
R13: ffff8801d9bc7ba8 R14: 0000000000000038 R15: 00000000000000b8
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f77bcb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000080653c0 CR3: 00000001d9872000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff82f9d180 ffffffff83cc6720 ffff8800b7779e00 ffff8801d9bc7ba8
 ffff8801d9bc7ba8 ffff8801d9bc7ba0 ffff8801d8e37b90 ffffffff82f950ce
 ffffffff82f95010 ffffffff843e37e0 ffff8800b777a8b8 dffffc0000000000
Call Trace:
 [<ffffffff82f950ce>] nf_queue_nf_hook_drop+0xbe/0x1d0 net/netfilter/nf_queue.c:108
 [<ffffffff82f90e2b>] nf_unregister_net_hook+0x2ab/0x350 net/netfilter/core.c:154
 [<ffffffff82f90f70>] nf_unregister_hook_list net/netfilter/core.c:434 [inline]
 [<ffffffff82f90f70>] netfilter_net_exit+0x40/0xb0 net/netfilter/core.c:466
 [<ffffffff82e2ab3e>] ops_exit_list.isra.4+0xae/0x150 net/core/net_namespace.c:134
 [<ffffffff82e2c821>] setup_net+0x221/0x3e0 net/core/net_namespace.c:303
 [<ffffffff82e2de92>] copy_net_ns+0xd2/0x190 net/core/net_namespace.c:369
 [<ffffffff81192e06>] create_new_namespaces+0x2f6/0x610 kernel/nsproxy.c:95
 [<ffffffff811936be>] unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:190
 [<ffffffff8112ca0a>] SYSC_unshare kernel/fork.c:2068 [inline]
 [<ffffffff8112ca0a>] SyS_unshare+0x3da/0x700 kernel/fork.c:2018
 [<ffffffff81006d74>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d74>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff83775e6a>] sysenter_flags_fixed+0xd/0x17
Code: df 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 67 3b 3c fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f4 01 00 00 49 8b 1e e8 7d 8c 2e fe 48 85 
RIP  [<ffffffff82f9d210>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff82f9d210>] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879
 RSP <ffff8801d8e37b30>
---[ end trace 2588ba9463913fd3 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..