[ 16.448874] 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: [ 21.591354] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.017624] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 22.789499] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) [ 41.643078] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available) Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. [ 47.035090] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.152251] IPVS: Creating netns size=2552 id=1 executing program [ 47.185842] IPVS: Creating netns size=2552 id=2 executing program [ 47.217599] IPVS: Creating netns size=2552 id=3 executing program [ 47.257207] IPVS: Creating netns size=2552 id=4 executing program [ 47.287349] IPVS: Creating netns size=2552 id=5 executing program [ 47.327341] IPVS: Creating netns size=2552 id=6 executing program [ 47.366839] IPVS: Creating netns size=2552 id=7 executing program [ 47.399249] IPVS: Creating netns size=2552 id=8 executing program [ 48.533147] IPVS: Creating netns size=2552 id=9 executing program [ 48.574804] IPVS: Creating netns size=2552 id=10 executing program [ 48.606068] IPVS: Creating netns size=2552 id=11 executing program [ 48.638852] IPVS: Creating netns size=2552 id=12 executing program [ 48.672633] IPVS: Creating netns size=2552 id=13 executing program [ 48.706142] IPVS: Creating netns size=2552 id=14 executing program [ 48.749437] IPVS: Creating netns size=2552 id=15 executing program [ 48.783613] IPVS: Creating netns size=2552 id=16 executing program [ 48.828941] IPVS: Creating netns size=2552 id=17 [ 56.077807] pktgen: kernel_thread() failed for cpu 0 [ 56.082962] pktgen: Cannot create thread for cpu 0 (-4) [ 56.088338] pktgen: kernel_thread() failed for cpu 1 [ 56.093456] pktgen: Cannot create thread for cpu 1 (-4) [ 56.098801] pktgen: Initialization failed for all threads [ 56.158047] kasan: CONFIG_KASAN_INLINE enabled [ 56.162509] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 56.175288] Dumping ftrace buffer: [ 56.178789] (ftrace buffer empty) [ 56.182461] Modules linked in: [ 56.185730] CPU: 0 PID: 3395 Comm: syzkaller645527 Not tainted 4.4.107-g610c835 #4 [ 56.193400] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.202721] task: ffff8801d0068000 task.stack: ffff8801d0130000 [ 56.208741] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 56.217659] RSP: 0018:ffff8801d0137920 EFLAGS: 00010202 [ 56.223075] RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9da39 [ 56.230310] RDX: 0000000000000000 RSI: ffffffff839fd520 RDI: ffffffff847e4480 [ 56.237544] RBP: ffff8801d0137950 R08: 0000000000000001 R09: 0000000000000000 [ 56.244792] R10: 0000000000000000 R11: 1ffff1003a026ef0 R12: dffffc0000000000 [ 56.252028] R13: ffff8801d0fd0548 R14: 0000000000000038 R15: 00000000000000b8 [ 56.259262] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000092ac840 [ 56.267451] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 56.273297] CR2: 00007f0696bbd000 CR3: 00000001d0aea000 CR4: 00000000001406f0 [ 56.280534] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.287768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.295002] Stack: [ 56.297113] ffffffff82f9d9b0 ffffffff83cc4ae0 ffff8801d0005a00 ffff8801d0fd0548 [ 56.305061] ffff8801d0fd0548 ffff8801d0fd0540 ffff8801d0137980 ffffffff82f959ce [ 56.313023] ffffffff82f95910 ffffffff843dd460 ffff8801d00064b8 dffffc0000000000 [ 56.320964] Call Trace: [ 56.323515] [] ? nfqnl_nf_hook_drop+0x100/0x3a0 [ 56.329799] [] nf_queue_nf_hook_drop+0xbe/0x1d0 [ 56.336082] [] ? nf_queue_entry_release_refs+0x150/0x150 [ 56.343151] [] nf_unregister_net_hook+0x2ab/0x350 [ 56.349611] [] netfilter_net_exit+0x40/0xb0 [ 56.355548] [] ? nf_unregister_net_hooks+0x60/0x60 [ 56.362093] [] ops_exit_list.isra.4+0xae/0x150 [ 56.368288] [] setup_net+0x221/0x3e0 [ 56.373616] [] ? ops_init+0x3a0/0x3a0 [ 56.379042] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 56.385851] [] ? kmem_cache_alloc+0x219/0x290 [ 56.391965] [] copy_net_ns+0xd2/0x190 [ 56.397386] [] create_new_namespaces+0x2f6/0x610 [ 56.403754] [] copy_namespaces+0x291/0x320 [ 56.409601] [] ? copy_namespaces+0x3e/0x320 [ 56.415535] [] copy_process+0x1d3a/0x60c0 [ 56.421295] [] ? __cleanup_sighand+0x50/0x50 [ 56.427315] [] ? __fsnotify_parent+0xbc/0x340 [ 56.433424] [] ? fsnotify+0x5ad/0xee0 [ 56.438838] [] ? fsnotify+0xee0/0xee0 [ 56.444250] [] _do_fork+0x151/0xe00 [ 56.449488] [] ? fork_idle+0x270/0x270 [ 56.454990] [] ? SyS_write+0x13d/0x1b0 [ 56.460492] [] ? SyS_read+0x1b0/0x1b0 [ 56.465906] [] SyS_clone+0x37/0x50 [ 56.471070] [] ? entry_INT80_compat+0x50/0x50 [ 56.477185] [] do_fast_syscall_32+0x314/0x890 [ 56.483293] [] sysenter_flags_fixed+0xd/0x17 [ 56.489311] 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 [ 56.515581] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 56.522156] RSP [ 56.525945] ---[ end trace d7b9b746907b4308 ]--- [ 56.530706] Kernel panic - not syncing: Fatal exception [ 56.536499] Dumping ftrace buffer: [ 56.540009] (ftrace buffer empty) [ 56.543686] Kernel Offset: disabled [ 56.547276] Rebooting in 86400 seconds..