[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.147947] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.914665] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 19.106136] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 20.072061] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available) [ 20.237162] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) Warning: Permanently added '10.128.15.208' (ECDSA) to the list of known hosts. [ 25.627851] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) executing program [ 25.733843] IPVS: Creating netns size=2552 id=1 executing program [ 26.804909] pktgen: kernel_thread() failed for cpu 0 [ 26.810087] pktgen: Cannot create thread for cpu 0 (-4) [ 26.815456] pktgen: kernel_thread() failed for cpu 1 [ 26.820659] pktgen: Cannot create thread for cpu 1 (-4) [ 26.825995] pktgen: Initialization failed for all threads [ 26.887535] kasan: CONFIG_KASAN_INLINE enabled [ 26.892098] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.904910] Dumping ftrace buffer: [ 26.908415] (ftrace buffer empty) [ 26.912098] Modules linked in: [ 26.915375] CPU: 1 PID: 3312 Comm: syzkaller327895 Not tainted 4.4.111-gc2f631b #20 [ 26.923132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.932456] task: ffff8800b5e54740 task.stack: ffff8800b4428000 [ 26.938479] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 26.947402] RSP: 0018:ffff8800b442fb30 EFLAGS: 00010202 [ 26.952816] RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9f429 [ 26.960056] RDX: 0000000000000000 RSI: ffffffff839fd820 RDI: ffffffff847ea088 [ 26.967296] RBP: ffff8800b442fb60 R08: 0000000000000001 R09: 0000000000000000 [ 26.974535] R10: 0000000000000000 R11: 1ffff10016885f32 R12: dffffc0000000000 [ 26.981776] R13: ffff8800b4b87008 R14: 0000000000000038 R15: 00000000000000b8 [ 26.989015] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7798b40 [ 26.997216] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 27.003070] CR2: 00007f732274e000 CR3: 00000000b457c000 CR4: 0000000000160670 [ 27.010310] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.017547] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.024785] Stack: [ 27.026904] ffffffff82f9f3a0 ffffffff83cc5820 ffff8800b4b98000 ffff8800b4b87008 [ 27.034866] ffff8800b4b87008 ffff8800b4b87000 ffff8800b442fb90 ffffffff82f972ee [ 27.042826] ffffffff82f97230 ffffffff843e2760 ffff8800b4b98ab8 dffffc0000000000 [ 27.050800] Call Trace: [ 27.053359] [] ? nfqnl_nf_hook_drop+0x100/0x3a0 [ 27.059648] [] nf_queue_nf_hook_drop+0xbe/0x1d0 [ 27.065932] [] ? nf_queue_entry_release_refs+0x150/0x150 [ 27.072998] [] nf_unregister_net_hook+0x2ab/0x350 [ 27.079464] [] netfilter_net_exit+0x40/0xb0 [ 27.085409] [] ? nf_unregister_net_hooks+0x60/0x60 [ 27.092045] [] ops_exit_list.isra.4+0xae/0x150 [ 27.098245] [] setup_net+0x221/0x3e0 [ 27.103575] [] ? ops_init+0x3a0/0x3a0 [ 27.108995] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 27.115801] [] ? kmem_cache_alloc+0x219/0x290 [ 27.121917] [] copy_net_ns+0xd2/0x190 [ 27.127337] [] create_new_namespaces+0x2f6/0x610 [ 27.133713] [] unshare_nsproxy_namespaces+0xae/0x1e0 [ 27.140431] [] SyS_unshare+0x3da/0x700 [ 27.145935] [] ? SyS_clone+0x50/0x50 [ 27.151269] [] ? check_preemption_disabled+0x3b/0x200 [ 27.158080] [] ? __mmdrop+0x163/0x260 [ 27.163503] [] ? __mmdrop+0x163/0x260 [ 27.168921] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 27.175727] [] ? do_fast_syscall_32+0xd7/0x890 [ 27.181925] [] ? SyS_clone+0x50/0x50 [ 27.187257] [] do_fast_syscall_32+0x314/0x890 [ 27.193371] [] sysenter_flags_fixed+0xd/0x17 [ 27.199394] 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 [ 27.225914] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 27.232494] RSP [ 27.236413] ---[ end trace 5a3af8dfe0d82e96 ]--- [ 27.241204] Kernel panic - not syncing: Fatal exception [ 27.246966] Dumping ftrace buffer: [ 27.250476] (ftrace buffer empty) [ 27.254153] Kernel Offset: disabled [ 27.257743] Rebooting in 86400 seconds..