[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.403458] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.562762] random: sshd: uninitialized urandom read (32 bytes read) [ 19.894690] random: sshd: uninitialized urandom read (32 bytes read) [ 20.398042] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. [ 26.183475] urandom_read: 1 callbacks suppressed [ 26.183479] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/29 10:36:37 parsed 1 programs [ 27.658525] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/29 10:36:39 executed programs: 0 [ 28.941833] IPVS: Creating netns size=2536 id=1 [ 29.071005] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 29.082638] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 29.127623] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 29.139717] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 29.184884] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 29.196335] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 29.209178] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 29.230348] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 29.725406] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 29.749664] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 29.755787] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 29.762451] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.004974] hrtimer: interrupt took 27318 ns [ 30.202989] l2tp_core: tunl 4: sockfd_lookup(fd=6) returned -9 [ 30.349713] l2tp_core: tunl 4: sockfd_lookup(fd=6) returned -9 [ 30.368929] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 30.377181] IP: [] l2tp_session_create+0xc60/0x16f0 [ 30.383937] PGD 1d442d067 [ 30.386581] PUD 1d4bc2067 PMD 0 [ 30.390064] [ 30.391692] Oops: 0002 [#1] PREEMPT SMP KASAN [ 30.396167] Dumping ftrace buffer: [ 30.399687] (ftrace buffer empty) [ 30.403376] Modules linked in: [ 30.406674] CPU: 0 PID: 4313 Comm: syz-executor0 Not tainted 4.9.124-g09eb2ba #35 [ 30.414266] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.423597] task: ffff8801d4b98000 task.stack: ffff8801d4900000 [ 30.429628] RIP: 0010:[] [] l2tp_session_create+0xc60/0x16f0 [ 30.438753] RSP: 0018:ffff8801d4907ab0 EFLAGS: 00010246 [ 30.444175] RAX: 0000000000000000 RBX: ffff8801d8690f00 RCX: 1ffff1003a97311d [ 30.451426] RDX: 1ffff1003a96cd20 RSI: ffff8801d4b988c8 RDI: ffff8801d4b66900 [ 30.458672] RBP: ffff8801d4907b50 R08: ffff8801d4b988e8 R09: 0000000000000000 [ 30.465932] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d4b667d8 [ 30.473188] R13: 0000000000000000 R14: ffff8801d4b66780 R15: ffff8801d4907c68 [ 30.480447] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7737b40 [ 30.488646] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.494501] CR2: 0000000000000080 CR3: 00000001d4bc7000 CR4: 00000000001606f0 [ 30.501754] Stack: [ 30.503885] 0000000000000201 ffffffff836c9ec1 ffff8801d4907ad0 ffffffff812383ad [ 30.511878] ffff8801d4b66780 ffff8801d8691058 ffff8801d4b667d8 ffff8801d8691050 [ 30.519885] ffff8801d8690fb0 ffff8801d4b667a0 0000000000000000 0000000000000000 [ 30.527963] Call Trace: [ 30.530536] [] ? l2tp_session_get+0x1d1/0x790 [ 30.536666] [] ? trace_hardirqs_on+0xd/0x10 [ 30.542630] [] pppol2tp_connect+0x10d7/0x18f0 [ 30.548755] [] ? pppol2tp_seq_show+0xc30/0xc30 [ 30.554977] [] ? security_socket_connect+0x8f/0xc0 [ 30.561535] [] SYSC_connect+0x1b8/0x300 [ 30.567137] [] ? SYSC_bind+0x280/0x280 [ 30.572653] [] ? compat_SyS_get_robust_list+0x310/0x310 [ 30.579653] [] ? move_addr_to_kernel+0x50/0x50 [ 30.585882] [] SyS_connect+0x24/0x30 [ 30.591223] [] ? SyS_accept+0x30/0x30 [ 30.596649] [] do_fast_syscall_32+0x2f7/0x870 [ 30.602774] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.609418] [] entry_SYSENTER_compat+0x90/0xa2 [ 30.615620] 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 [ 30.642582] RIP [] l2tp_session_create+0xc60/0x16f0 [ 30.649361] RSP [ 30.652961] CR2: 0000000000000080 [ 30.657255] ---[ end trace f17a7346ab1f69ee ]--- [ 30.662026] Kernel panic - not syncing: Fatal exception [ 30.667661] Dumping ftrace buffer: [ 30.671182] (ftrace buffer empty) [ 30.674865] Kernel Offset: disabled [ 30.678462] Rebooting in 86400 seconds..