[ 16.095718] 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: [ 19.946138] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 20.218053] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.157650] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) [ 33.606022] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available) Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. [ 39.001828] random: sshd: uninitialized urandom read (32 bytes read, 128 bits of entropy available) executing program executing program [ 39.104909] IPVS: Creating netns size=2552 id=1 [ 40.164922] pktgen: kernel_thread() failed for cpu 0 [ 40.170087] pktgen: Cannot create thread for cpu 0 (-4) [ 40.175467] pktgen: kernel_thread() failed for cpu 1 [ 40.180670] pktgen: Cannot create thread for cpu 1 (-4) [ 40.186002] pktgen: Initialization failed for all threads [ 40.257227] kasan: CONFIG_KASAN_INLINE enabled [ 40.261815] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.274621] Dumping ftrace buffer: [ 40.278128] (ftrace buffer empty) [ 40.281808] Modules linked in: [ 40.285083] CPU: 1 PID: 3335 Comm: syzkaller855898 Not tainted 4.4.112-g52c02cf #30 [ 40.292844] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.302167] task: ffff8800b3c5c740 task.stack: ffff8801d0798000 [ 40.308189] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 40.317123] RSP: 0018:ffff8801d079f998 EFLAGS: 00010202 [ 40.322539] RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9fe19 [ 40.329775] RDX: 0000000000000000 RSI: ffffffff839fdb20 RDI: ffffffff847ea508 [ 40.337013] RBP: ffff8801d079f9c8 R08: 0000000000000001 R09: 0000000000000000 [ 40.344251] R10: 0000000000000000 R11: 1ffff1003a0f3efe R12: dffffc0000000000 [ 40.351490] R13: ffff8801d0942668 R14: 0000000000000038 R15: 00000000000000b8 [ 40.358730] FS: 00007fcfc0b5c700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 40.366922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.372772] CR2: 00007f4a324ee000 CR3: 00000001d0998000 CR4: 0000000000160670 [ 40.380014] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.387252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.394497] Stack: [ 40.396614] ffffffff82f9fd90 ffffffff83cc5d20 ffff8800b45a9e00 ffff8801d0942668 [ 40.404569] ffff8801d0942668 ffff8801d0942660 ffff8801d079f9f8 ffffffff82f97cde [ 40.412521] ffffffff82f97c20 ffffffff843e2760 ffff8800b45aa8b8 dffffc0000000000 [ 40.420476] Call Trace: [ 40.423033] [] ? nfqnl_nf_hook_drop+0x100/0x3a0 [ 40.429323] [] nf_queue_nf_hook_drop+0xbe/0x1d0 [ 40.435608] [] ? nf_queue_entry_release_refs+0x150/0x150 [ 40.442682] [] nf_unregister_net_hook+0x2ab/0x350 [ 40.449141] [] netfilter_net_exit+0x40/0xb0 [ 40.455080] [] ? nf_unregister_net_hooks+0x60/0x60 [ 40.461627] [] ops_exit_list.isra.4+0xae/0x150 [ 40.467825] [] setup_net+0x221/0x3e0 [ 40.473161] [] ? ops_init+0x3a0/0x3a0 [ 40.478578] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 40.485388] [] copy_net_ns+0xd2/0x190 [ 40.490805] [] create_new_namespaces+0x2f6/0x610 [ 40.497176] [] copy_namespaces+0x291/0x320 [ 40.503034] [] ? copy_namespaces+0x3e/0x320 [ 40.508972] [] copy_process+0x1d98/0x6120 [ 40.514742] [] ? __cleanup_sighand+0x50/0x50 [ 40.520767] [] _do_fork+0x151/0xe00 [ 40.526010] [] ? fork_idle+0x270/0x270 [ 40.531514] [] ? __do_page_fault+0x380/0xa00 [ 40.537538] [] ? retint_user+0x18/0x3c [ 40.543041] [] SyS_clone+0x37/0x50 [ 40.548200] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 40.554751] Code: a2 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 37 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 2d 50 2e fe 48 85 [ 40.581219] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 40.587794] RSP [ 40.591445] ---[ end trace 2254878f2fc41877 ]--- [ 40.596167] Kernel panic - not syncing: Fatal exception [ 40.601850] Dumping ftrace buffer: [ 40.605357] (ftrace buffer empty) [ 40.609033] Kernel Offset: disabled [ 40.612626] Rebooting in 86400 seconds..