[ 19.619464] random: sshd: uninitialized urandom read (32 bytes read, 33 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: [ 21.159825] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 21.395210] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 22.262313] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available) [ 22.430624] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available) Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts. [ 27.828584] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available) executing program executing program [ 27.929880] IPVS: Creating netns size=2552 id=1 [ 28.695641] pktgen: kernel_thread() failed for cpu 0 [ 28.700767] pktgen: Cannot create thread for cpu 0 (-4) [ 28.708709] pktgen: kernel_thread() failed for cpu 1 [ 28.713844] pktgen: Cannot create thread for cpu 1 (-4) [ 28.719184] pktgen: Initialization failed for all threads [ 28.761987] kasan: CONFIG_KASAN_INLINE enabled [ 28.766394] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.779221] Dumping ftrace buffer: [ 28.782726] (ftrace buffer empty) [ 28.786403] Modules linked in: [ 28.789683] CPU: 1 PID: 3787 Comm: syzkaller724184 Not tainted 4.4.115-g55a366596 #14 [ 28.797619] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.806943] task: ffff8800bb9e0000 task.stack: ffff8801d92c0000 [ 28.812975] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 28.821904] RSP: 0018:ffff8801d92c7ba8 EFLAGS: 00010202 [ 28.827320] RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9d209 [ 28.834558] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84418180 [ 28.841796] RBP: ffff8801d92c7bd8 R08: 0000000000000000 R09: 0000000000000000 [ 28.849032] R10: ffffffff83844400 R11: 1ffff1003b258f40 R12: dffffc0000000000 [ 28.856274] R13: ffff8801d0df8248 R14: 0000000000000038 R15: 00000000000000b8 [ 28.863515] FS: 00007f45a1f7a700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 28.871709] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.877557] CR2: 00007f1035c19518 CR3: 00000001d9880000 CR4: 0000000000160670 [ 28.884797] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.892034] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.899272] Stack: [ 28.901389] ffffffff82f9d180 ffffffff83cc6720 ffff8801d9671e00 ffff8801d0df8248 [ 28.909385] ffff8801d0df8248 ffff8801d0df8240 ffff8801d92c7c08 ffffffff82f950ce [ 28.917344] ffffffff82f95010 ffffffff843e37e0 ffff8801d96728b8 dffffc0000000000 [ 28.925305] Call Trace: [ 28.927865] [] ? nfqnl_nf_hook_drop+0x100/0x3a0 [ 28.934151] [] nf_queue_nf_hook_drop+0xbe/0x1d0 [ 28.940441] [] ? nf_queue_entry_release_refs+0x150/0x150 [ 28.947511] [] nf_unregister_net_hook+0x2ab/0x350 [ 28.953972] [] netfilter_net_exit+0x40/0xb0 [ 28.959912] [] ? nf_unregister_net_hooks+0x60/0x60 [ 28.966459] [] ops_exit_list.isra.4+0xae/0x150 [ 28.972657] [] setup_net+0x221/0x3e0 [ 28.977990] [] ? ops_init+0x3a0/0x3a0 [ 28.983408] [] ? kasan_slab_alloc+0x12/0x20 [ 28.989346] [] copy_net_ns+0xd2/0x190 [ 28.994766] [] create_new_namespaces+0x2f6/0x610 [ 29.001148] [] unshare_nsproxy_namespaces+0xae/0x1e0 [ 29.007871] [] SyS_unshare+0x3da/0x700 [ 29.013376] [] ? __do_page_fault+0x290/0xa00 [ 29.019399] [] ? SyS_clone+0x50/0x50 [ 29.024728] [] ? __do_page_fault+0x380/0xa00 [ 29.030755] [] ? up_read+0x1a/0x40 [ 29.035912] [] ? __do_page_fault+0x149/0xa00 [ 29.041938] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 29.048485] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 29.055027] Code: df 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 67 3b 3c fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f4 01 00 00 49 8b 1e e8 7d 8c 2e fe 48 85 [ 29.081508] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 29.088090] RSP [ 29.091747] ---[ end trace 064e26c5a438dd93 ]--- [ 29.096484] Kernel panic - not syncing: Fatal exception [ 29.102226] Dumping ftrace buffer: [ 29.105741] (ftrace buffer empty) [ 29.109421] Kernel Offset: disabled [ 29.113015] Rebooting in 86400 seconds..