[ 15.327513] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] 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: [ 21.276979] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.617122] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.343943] random: sshd: uninitialized urandom read (32 bytes read, 87 bits of entropy available) [ 39.358093] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) Warning: Permanently added '10.128.15.228' (ECDSA) to the list of known hosts. [ 44.741938] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 44.855840] IPVS: Creating netns size=2552 id=1 executing program [ 44.879709] IPVS: Creating netns size=2552 id=2 executing program [ 44.913571] IPVS: Creating netns size=2552 id=3 executing program [ 44.938992] IPVS: Creating netns size=2552 id=4 executing program [ 44.964387] IPVS: Creating netns size=2552 id=5 executing program [ 45.000837] IPVS: Creating netns size=2552 id=6 executing program [ 45.037135] IPVS: Creating netns size=2552 id=7 executing program [ 45.073515] IPVS: Creating netns size=2552 id=8 executing program [ 46.201982] IPVS: Creating netns size=2552 id=9 executing program [ 46.238262] IPVS: Creating netns size=2552 id=10 executing program [ 46.264577] IPVS: Creating netns size=2552 id=11 executing program [ 46.301487] IPVS: Creating netns size=2552 id=12 executing program [ 46.329325] IPVS: Creating netns size=2552 id=13 executing program [ 46.368014] IPVS: Creating netns size=2552 id=14 executing program [ 46.395854] IPVS: Creating netns size=2552 id=15 executing program [ 46.435263] IPVS: Creating netns size=2552 id=16 executing program [ 46.474982] IPVS: Creating netns size=2552 id=17 [ 53.369486] pktgen: kernel_thread() failed for cpu 0 [ 53.374649] pktgen: Cannot create thread for cpu 0 (-4) [ 53.380020] pktgen: kernel_thread() failed for cpu 1 [ 53.385118] pktgen: Cannot create thread for cpu 1 (-4) [ 53.390452] pktgen: Initialization failed for all threads [ 53.449849] kasan: CONFIG_KASAN_INLINE enabled [ 53.454411] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 53.467189] Dumping ftrace buffer: [ 53.470692] (ftrace buffer empty) [ 53.474366] Modules linked in: [ 53.477634] CPU: 0 PID: 3378 Comm: syzkaller237124 Not tainted 4.4.107-g610c835 #12 [ 53.485390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.494708] task: ffff8801d1ab0000 task.stack: ffff8800b1318000 [ 53.500727] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 53.509644] RSP: 0018:ffff8800b131fba8 EFLAGS: 00010202 [ 53.515054] RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9da39 [ 53.522294] RDX: 0000000000000000 RSI: ffffffff839fd520 RDI: ffffffff847e4480 [ 53.529533] RBP: ffff8800b131fbd8 R08: 0000000000000001 R09: 0000000000000000 [ 53.536770] R10: 0000000000000000 R11: 1ffff10016263f40 R12: dffffc0000000000 [ 53.544331] R13: ffff8801d0580668 R14: 0000000000000038 R15: 00000000000000b8 [ 53.551575] FS: 00000000010b0880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 53.559765] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.565612] CR2: 00007f36f1d03000 CR3: 00000000b64ae000 CR4: 00000000001406f0 [ 53.572849] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.580084] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.587318] Stack: [ 53.589427] ffffffff82f9d9b0 ffffffff83cc4ae0 ffff8800b4e18000 ffff8801d0580668 [ 53.597370] ffff8801d0580668 ffff8801d0580660 ffff8800b131fc08 ffffffff82f959ce [ 53.605310] ffffffff82f95910 ffffffff843dd460 ffff8800b4e18ab8 dffffc0000000000 [ 53.613249] Call Trace: [ 53.615802] [] ? nfqnl_nf_hook_drop+0x100/0x3a0 [ 53.622087] [] nf_queue_nf_hook_drop+0xbe/0x1d0 [ 53.628373] [] ? nf_queue_entry_release_refs+0x150/0x150 [ 53.635438] [] nf_unregister_net_hook+0x2ab/0x350 [ 53.641891] [] netfilter_net_exit+0x40/0xb0 [ 53.647825] [] ? nf_unregister_net_hooks+0x60/0x60 [ 53.654370] [] ops_exit_list.isra.4+0xae/0x150 [ 53.660565] [] setup_net+0x221/0x3e0 [ 53.665891] [] ? ops_init+0x3a0/0x3a0 [ 53.671303] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 53.678107] [] copy_net_ns+0xd2/0x190 [ 53.683522] [] create_new_namespaces+0x2f6/0x610 [ 53.689893] [] unshare_nsproxy_namespaces+0xae/0x1e0 [ 53.696609] [] SyS_unshare+0x3da/0x700 [ 53.702109] [] ? SyS_clone+0x50/0x50 [ 53.707438] [] ? SyS_read+0x1b0/0x1b0 [ 53.712853] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 53.719308] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 53.725846] 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 [ 53.752122] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 53.758695] RSP [ 53.762479] ---[ end trace 781929fc254450c7 ]--- [ 53.767219] Kernel panic - not syncing: Fatal exception [ 53.772990] Dumping ftrace buffer: [ 53.776498] (ftrace buffer empty) [ 53.780172] Kernel Offset: disabled [ 53.783761] Rebooting in 86400 seconds..