[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.818055] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.298444] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 23.259628] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) [ 45.721231] random: sshd: uninitialized urandom read (32 bytes read, 127 bits of entropy available) [ 45.831143] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts. [ 51.204401] IPVS: Creating netns size=2552 id=1 [ 51.228811] IPVS: Creating netns size=2552 id=2 executing program executing program [ 51.252446] IPVS: Creating netns size=2552 id=3 [ 51.280092] IPVS: Creating netns size=2552 id=4 executing program [ 51.305785] IPVS: Creating netns size=2552 id=5 [ 51.332473] IPVS: Creating netns size=2552 id=6 executing program executing program [ 51.358435] IPVS: Creating netns size=2552 id=7 executing program [ 51.384237] IPVS: Creating netns size=2552 id=8 executing program executing program executing program [ 51.410894] IPVS: Creating netns size=2552 id=9 executing program [ 51.440726] IPVS: Creating netns size=2552 id=10 executing program [ 51.469338] IPVS: Creating netns size=2552 id=11 executing program [ 51.508822] IPVS: Creating netns size=2552 id=12 executing program [ 51.548055] IPVS: Creating netns size=2552 id=13 executing program [ 51.589917] IPVS: Creating netns size=2552 id=14 executing program [ 51.619710] IPVS: Creating netns size=2552 id=15 executing program [ 52.689089] IPVS: Creating netns size=2552 id=16 executing program [ 52.719149] IPVS: Creating netns size=2552 id=17 executing program [ 52.758629] IPVS: Creating netns size=2552 id=18 executing program [ 52.800315] IPVS: Creating netns size=2552 id=19 executing program [ 52.841350] IPVS: Creating netns size=2552 id=20 executing program [ 52.875822] IPVS: Creating netns size=2552 id=21 executing program [ 52.909181] IPVS: Creating netns size=2552 id=22 executing program [ 52.951715] IPVS: Creating netns size=2552 id=23 [ 58.357187] pktgen: kernel_thread() failed for cpu 0 [ 58.362376] pktgen: Cannot create thread for cpu 0 (-4) [ 58.367950] pktgen: kernel_thread() failed for cpu 1 [ 58.373046] pktgen: Cannot create thread for cpu 1 (-4) [ 58.378561] pktgen: Initialization failed for all threads [ 58.435590] kasan: CONFIG_KASAN_INLINE enabled [ 58.440073] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 58.452916] Dumping ftrace buffer: [ 58.456426] (ftrace buffer empty) [ 58.460108] Modules linked in: [ 58.463386] CPU: 0 PID: 3394 Comm: syzkaller853727 Not tainted 4.4.113-g202e079 #1 [ 58.471064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.480392] task: ffff8801cf47df00 task.stack: ffff8800b0aa8000 [ 58.486419] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 58.495359] RSP: 0018:ffff8800b0aafba8 EFLAGS: 00010202 [ 58.500780] RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9b6d9 [ 58.508033] RDX: 0000000000000000 RSI: ffffffff839fe320 RDI: ffffffff847eb500 [ 58.515276] RBP: ffff8800b0aafbd8 R08: 0000000000000001 R09: 0000000000000000 [ 58.522521] R10: 0000000000000000 R11: 1ffff10016155f40 R12: dffffc0000000000 [ 58.529765] R13: ffff8801cff51c08 R14: 0000000000000038 R15: 00000000000000b8 [ 58.537013] FS: 0000000000e09880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 58.545221] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.551078] CR2: 00007f9b5294e000 CR3: 00000000b0850000 CR4: 0000000000160670 [ 58.558336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.565579] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.572831] Stack: [ 58.574965] ffffffff82f9b650 ffffffff83cc6560 ffff8801d07ebc00 ffff8801cff51c08 [ 58.582939] ffff8801cff51c08 ffff8801cff51c00 ffff8800b0aafc08 ffffffff82f9359e [ 58.590954] ffffffff82f934e0 ffffffff843e3760 ffff8801d07ec6b8 dffffc0000000000 [ 58.598942] Call Trace: [ 58.601507] [] ? nfqnl_nf_hook_drop+0x100/0x3a0 [ 58.607801] [] nf_queue_nf_hook_drop+0xbe/0x1d0 [ 58.614095] [] ? nf_queue_entry_release_refs+0x150/0x150 [ 58.621174] [] nf_unregister_net_hook+0x2ab/0x350 [ 58.627647] [] netfilter_net_exit+0x40/0xb0 [ 58.633607] [] ? nf_unregister_net_hooks+0x60/0x60 [ 58.640164] [] ops_exit_list.isra.4+0xae/0x150 [ 58.646372] [] setup_net+0x221/0x3e0 [ 58.651710] [] ? ops_init+0x3a0/0x3a0 [ 58.657139] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 58.663973] [] copy_net_ns+0xd2/0x190 [ 58.669402] [] create_new_namespaces+0x2f6/0x610 [ 58.675780] [] unshare_nsproxy_namespaces+0xae/0x1e0 [ 58.682513] [] SyS_unshare+0x3da/0x700 [ 58.688034] [] ? SyS_clone+0x50/0x50 [ 58.693369] [] ? SyS_read+0x1b0/0x1b0 [ 58.698793] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 58.705260] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 58.711810] Code: f9 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 45 3c fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f4 01 00 00 49 8b 1e e8 fd 96 2e fe 48 85 [ 58.738499] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 58.745086] RSP [ 58.752404] ---[ end trace 30da5e9b1997d9cb ]--- [ 58.757167] Kernel panic - not syncing: Fatal exception [ 58.762983] Dumping ftrace buffer: [ 58.767209] (ftrace buffer empty) [ 58.770895] Kernel Offset: disabled [ 58.774492] Rebooting in 86400 seconds..