[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.283193] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 12.970574] random: sshd: uninitialized urandom read (32 bytes read) [ 13.118327] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 13.667681] random: sshd: uninitialized urandom read (32 bytes read) [ 40.319127] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. [ 46.048556] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/24 04:51:34 parsed 1 programs [ 47.280459] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/24 04:51:36 executed programs: 0 [ 48.739198] IPVS: Creating netns size=2536 id=1 [ 48.752723] IPVS: Creating netns size=2536 id=2 [ 48.794614] IPVS: Creating netns size=2536 id=3 [ 48.829950] IPVS: Creating netns size=2536 id=4 [ 48.870968] IPVS: Creating netns size=2536 id=5 [ 48.905190] IPVS: Creating netns size=2536 id=6 [ 48.945024] IPVS: Creating netns size=2536 id=7 [ 48.982131] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 48.989565] IPVS: Creating netns size=2536 id=8 [ 49.008145] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.027288] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 49.066233] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.169324] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.210406] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.226428] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.251423] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.264990] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 49.292583] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.314010] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 49.331037] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.375373] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 49.419868] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 49.427930] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 49.441481] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 49.452492] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.461852] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.470887] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 49.479380] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 49.487465] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.496477] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 49.511168] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.519470] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 49.534857] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.551621] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.564195] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 49.571721] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 49.590869] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.628830] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 49.659540] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.680807] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 49.690237] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.710692] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.734278] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.742335] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 49.751947] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 49.760688] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.769824] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 49.778150] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 49.800233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 49.808476] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 49.824068] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.834580] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 49.846529] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 49.867176] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 49.914330] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 49.924427] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 49.943982] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 49.956660] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 49.967425] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 49.977399] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 49.985458] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 49.993441] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 50.002026] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 50.016162] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 50.025548] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 50.034569] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 50.042538] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 50.056433] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 50.070144] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 50.079803] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 50.092901] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 50.104042] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 50.116590] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 50.135183] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 50.143567] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 50.151047] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 50.158653] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 50.168682] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 50.178683] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 50.186204] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 50.195221] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 50.224999] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 50.251285] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 50.264109] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 50.271491] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 50.292029] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 50.314866] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 50.323747] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 52.696076] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 52.832004] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 52.846409] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 52.854927] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 52.959495] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.087162] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.156829] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 53.171431] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 53.179669] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.254131] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 53.266069] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 53.276653] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.296431] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.357127] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.446373] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 53.459447] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 53.468534] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.523510] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 53.532956] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 53.539674] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.566119] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.617652] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.739176] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 53.749056] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 53.759271] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.782823] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 53.788944] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 53.800651] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.818440] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.977568] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 54.002508] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 54.009249] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 2018/08/24 04:51:42 executed programs: 8 [ 56.253950] l2tp_core: tunl 4: sockfd_lookup(fd=5) returned -9 [ 57.501136] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 57.509452] IP: [] l2tp_session_create+0xc60/0x16f0 [ 57.516200] PGD 1d981e067 [ 57.518856] PUD 1be6eb067 PMD 0 [ 57.522413] [ 57.524083] Oops: 0002 [#1] PREEMPT SMP KASAN [ 57.528570] Dumping ftrace buffer: [ 57.532096] (ftrace buffer empty) [ 57.535795] Modules linked in: [ 57.539109] CPU: 0 PID: 7654 Comm: syz-executor1 Not tainted 4.9.123-g7fa8c15 #80 [ 57.546708] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.556038] task: ffff8801d5d8c800 task.stack: ffff8801d3d28000 [ 57.562069] RIP: 0010:[] [] l2tp_session_create+0xc60/0x16f0 [ 57.571182] RSP: 0018:ffff8801d3d2fac0 EFLAGS: 00010246 [ 57.576609] RAX: 0000000000000000 RBX: ffff8801d456f680 RCX: 1ffff1003abb1a1d [ 57.583855] RDX: 1ffff1003a8d4880 RSI: ffff8801d5d8d0c8 RDI: ffff8801d46a4400 [ 57.591100] RBP: ffff8801d3d2fb60 R08: ffff8801d5d8d0e8 R09: 0000000000000000 [ 57.598345] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d46a42d8 [ 57.605591] R13: 0000000000000000 R14: ffff8801d46a4280 R15: 0000000000000000 [ 57.612840] FS: 00007fe87784d700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 57.621040] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.626901] CR2: 0000000000000080 CR3: 00000001d3e25000 CR4: 00000000001606f0 [ 57.634154] Stack: [ 57.636291] ffffffff836c91a7 0000000000000000 ffff8801d45f6e48 0000000000000000 [ 57.644368] ffff8801d46a4280 ffff8801d456f7d8 ffff8801d46a42d8 ffff8801d456f7d0 [ 57.652372] ffff8801d456f730 ffff8801d46a42a0 ffff8801d45f6600 0000000000000000 [ 57.660396] Call Trace: [ 57.662967] [] ? l2tp_session_create+0xed7/0x16f0 [ 57.669438] [] pppol2tp_connect+0x10d7/0x18f0 [ 57.675559] [] ? pppol2tp_seq_show+0xc30/0xc30 [ 57.681773] [] ? security_socket_connect+0x8f/0xc0 [ 57.688349] [] SYSC_connect+0x1b8/0x300 [ 57.693950] [] ? SYSC_bind+0x280/0x280 [ 57.699494] [] ? get_unused_fd_flags+0xd0/0xd0 [ 57.705714] [] ? do_futex+0x17c0/0x17c0 [ 57.711329] [] ? SyS_socket+0x121/0x1b0 [ 57.716932] [] ? move_addr_to_kernel+0x50/0x50 [ 57.723145] [] SyS_connect+0x24/0x30 [ 57.728490] [] ? SyS_accept+0x30/0x30 [ 57.733919] [] do_syscall_64+0x1a6/0x490 [ 57.739607] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 57.746515] Code: 00 00 49 8d be 80 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 7b 09 00 00 49 8b 86 80 01 00 00 ff 80 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 55 d0 [ 57.773672] RIP [] l2tp_session_create+0xc60/0x16f0 [ 57.780472] RSP [ 57.784088] CR2: 0000000000000080 [ 57.789093] ---[ end trace 3873f9dc96d806c1 ]--- [ 57.794955] Kernel panic - not syncing: Fatal exception [ 57.800618] Dumping ftrace buffer: [ 57.804142] (ftrace buffer empty) [ 57.807827] Kernel Offset: disabled [ 57.811453] Rebooting in 86400 seconds..