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: 3364 Comm: syzkaller401493 Not tainted 4.4.107-g610c835 #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d119af80 task.stack: ffff8801d0728000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:218 [inline] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:874 RSP: 0018:ffff8801d072fba8 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9da39 RDX: 0000000000000000 RSI: ffffffff839fd520 RDI: ffffffff847e4488 RBP: ffff8801d072fbd8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 1ffff1003a0e5f40 R12: dffffc0000000000 R13: ffff8801d20abb48 R14: 0000000000000038 R15: 00000000000000b8 FS: 0000000001bb4880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ece000 CR3: 00000001d0a08000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff82f9d9b0 ffffffff83cc4ae0 ffff8801d0690000 ffff8801d20abb48 ffff8801d20abb48 ffff8801d20abb40 ffff8801d072fc08 ffffffff82f959ce ffffffff82f95910 ffffffff843dd460 ffff8801d0690ab8 dffffc0000000000 Call Trace: [] nf_queue_nf_hook_drop+0xbe/0x1d0 net/netfilter/nf_queue.c:108 [] nf_unregister_net_hook+0x2ab/0x350 net/netfilter/core.c:154 [] nf_unregister_hook_list net/netfilter/core.c:434 [inline] [] netfilter_net_exit+0x40/0xb0 net/netfilter/core.c:466 [] ops_exit_list.isra.4+0xae/0x150 net/core/net_namespace.c:134 [] setup_net+0x221/0x3e0 net/core/net_namespace.c:303 [] copy_net_ns+0xd2/0x190 net/core/net_namespace.c:369 [] create_new_namespaces+0x2f6/0x610 kernel/nsproxy.c:95 [] unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:190 [] SYSC_unshare kernel/fork.c:2062 [inline] [] SyS_unshare+0x3da/0x700 kernel/fork.c:2012 [] entry_SYSCALL_64_fastpath+0x16/0x76 Code: 65 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 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 6d 52 2e fe 48 85 RIP [] __read_once_size include/linux/compiler.h:218 [inline] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:874 RSP ---[ end trace 82556511f7612e17 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..