[ 15.896513] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.411799] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.727670] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.510516] random: sshd: uninitialized urandom read (32 bytes read, 94 bits of entropy available) [ 22.670741] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) Warning: Permanently added '10.128.15.237' (ECDSA) to the list of known hosts. [ 28.065804] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program [ 28.198352] IPVS: Creating netns size=2552 id=1 [ 28.226039] IPVS: Creating netns size=2552 id=2 executing program [ 28.254432] IPVS: Creating netns size=2552 id=3 executing program executing program [ 28.293743] IPVS: Creating netns size=2552 id=4 executing program [ 28.325255] IPVS: Creating netns size=2552 id=5 [ 28.365010] IPVS: Creating netns size=2552 id=6 executing program [ 28.394718] IPVS: Creating netns size=2552 id=7 executing program executing program [ 28.437690] IPVS: Creating netns size=2552 id=8 executing program [ 29.589792] IPVS: Creating netns size=2552 id=9 executing program [ 29.631522] IPVS: Creating netns size=2552 id=10 executing program [ 29.673978] IPVS: Creating netns size=2552 id=11 executing program [ 29.718255] IPVS: Creating netns size=2552 id=12 executing program [ 29.752231] IPVS: Creating netns size=2552 id=13 executing program [ 29.786363] IPVS: Creating netns size=2552 id=14 executing program [ 29.821997] IPVS: Creating netns size=2552 id=15 executing program [ 29.867387] IPVS: Creating netns size=2552 id=16 executing program [ 36.432388] pktgen: kernel_thread() failed for cpu 0 [ 36.437575] pktgen: Cannot create thread for cpu 0 (-4) [ 36.442944] pktgen: kernel_thread() failed for cpu 1 [ 36.448090] pktgen: Cannot create thread for cpu 1 (-4) [ 36.453424] pktgen: Initialization failed for all threads [ 36.532603] kasan: CONFIG_KASAN_INLINE enabled [ 36.537049] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.549829] Dumping ftrace buffer: [ 36.553330] (ftrace buffer empty) [ 36.557006] Modules linked in: [ 36.560276] CPU: 1 PID: 3363 Comm: syzkaller921854 Not tainted 4.4.107-g610c835 #4 [ 36.567946] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.577271] task: ffff8800b45797c0 task.stack: ffff8800b36f8000 [ 36.583290] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 36.592211] RSP: 0018:ffff8800b36ffb30 EFLAGS: 00010202 [ 36.597624] RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9da39 [ 36.604871] RDX: 0000000000000000 RSI: ffffffff839fd520 RDI: ffffffff847e4488 [ 36.612112] RBP: ffff8800b36ffb60 R08: 0000000000000001 R09: 0000000000000000 [ 36.619349] R10: 0000000000000000 R11: 1ffff100166dff32 R12: dffffc0000000000 [ 36.626583] R13: ffff8800b3298cc8 R14: 0000000000000038 R15: 00000000000000b8 [ 36.633818] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009eda840 [ 36.642008] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 36.647855] CR2: 00007f74ab7cc000 CR3: 00000000b7e1b000 CR4: 00000000001406e0 [ 36.655092] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.662325] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.669558] Stack: [ 36.671672] ffffffff82f9d9b0 ffffffff83cc4ae0 ffff8800b0a79e00 ffff8800b3298cc8 [ 36.679613] ffff8800b3298cc8 ffff8800b3298cc0 ffff8800b36ffb90 ffffffff82f959ce [ 36.687549] ffffffff82f95910 ffffffff843dd460 ffff8800b0a7a8b8 dffffc0000000000 [ 36.695494] Call Trace: [ 36.698046] [] ? nfqnl_nf_hook_drop+0x100/0x3a0 [ 36.704329] [] nf_queue_nf_hook_drop+0xbe/0x1d0 [ 36.710612] [] ? nf_queue_entry_release_refs+0x150/0x150 [ 36.717689] [] nf_unregister_net_hook+0x2ab/0x350 [ 36.724145] [] netfilter_net_exit+0x40/0xb0 [ 36.730078] [] ? nf_unregister_net_hooks+0x60/0x60 [ 36.736623] [] ops_exit_list.isra.4+0xae/0x150 [ 36.742816] [] setup_net+0x221/0x3e0 [ 36.748232] [] ? ops_init+0x3a0/0x3a0 [ 36.753649] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 36.760455] [] ? kmem_cache_alloc+0x219/0x290 [ 36.766564] [] copy_net_ns+0xd2/0x190 [ 36.771978] [] create_new_namespaces+0x2f6/0x610 [ 36.778347] [] unshare_nsproxy_namespaces+0xae/0x1e0 [ 36.785062] [] SyS_unshare+0x3da/0x700 [ 36.790561] [] ? SyS_clone+0x50/0x50 [ 36.795889] [] ? SyS_read+0x1b0/0x1b0 [ 36.801303] [] ? do_fast_syscall_32+0xd7/0x890 [ 36.807497] [] ? SyS_clone+0x50/0x50 [ 36.812825] [] do_fast_syscall_32+0x314/0x890 [ 36.818937] [] sysenter_flags_fixed+0xd/0x17 [ 36.824957] 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 [ 36.851213] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 36.857780] RSP [ 36.861555] ---[ end trace be1623abf57e00b1 ]--- [ 36.866308] Kernel panic - not syncing: Fatal exception [ 36.872078] Dumping ftrace buffer: [ 36.875589] (ftrace buffer empty) [ 36.879265] Kernel Offset: disabled [ 36.882856] Rebooting in 86400 seconds..