[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.416416] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.908262] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 25.266241] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 25.984445] random: sshd: uninitialized urandom read (32 bytes read, 75 bits of entropy available) [ 96.365425] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available) Warning: Permanently added '10.128.15.196' (ECDSA) to the list of known hosts. [ 102.006635] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) 2018/08/22 19:15:30 parsed 1 programs [ 103.121411] random: cc1: uninitialized urandom read (8 bytes read, 108 bits of entropy available) 2018/08/22 19:15:32 executed programs: 0 [ 104.672337] IPVS: Creating netns size=2552 id=1 [ 104.913861] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 104.928326] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 105.012411] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 105.027712] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 105.111702] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 105.127688] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 105.145621] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 105.162919] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 105.900727] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 105.940869] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 106.380762] l2tp_core: tunl 4: sockfd_lookup(fd=5) returned -9 [ 106.722410] kasan: CONFIG_KASAN_INLINE enabled [ 106.726985] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 106.740362] Dumping ftrace buffer: [ 106.743875] (ftrace buffer empty) [ 106.747564] Modules linked in: [ 106.750913] CPU: 0 PID: 4460 Comm: syz-executor0 Not tainted 4.4.151-ge917467 #84 [ 106.758515] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 106.768118] task: ffff8801c9f71800 task.stack: ffff8801c9f90000 [ 106.774150] RIP: 0010:[] [] pppol2tp_connect+0x873/0x1910 [ 106.783054] RSP: 0018:ffff8801c9f97bc8 EFLAGS: 00010202 [ 106.788551] RAX: dffffc0000000000 RBX: ffff8800b7bdee80 RCX: 1ffffffff0942ce0 [ 106.795807] RDX: 000000000000003b RSI: ffffffff835adf9b RDI: 00000000000001d8 [ 106.803060] RBP: ffff8801c9f97d78 R08: ffff8801c9f72128 R09: 0000000000000000 [ 106.810450] R10: 0000000000000001 R11: ffff8801c9f71800 R12: ffff8801da2f5900 [ 106.817827] R13: ffff8800b7bdeeb0 R14: 0000000000000000 R15: ffff8801d658aa00 [ 106.825082] FS: 00007f40bc392700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 106.833311] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 106.839174] CR2: 0000000020000180 CR3: 00000001da122000 CR4: 00000000001606f0 [ 106.846430] Stack: [ 106.848558] ffffffff835adf3b 0000000200000005 ffff8801c9f97cd0 ffff880100000000 [ 106.856570] ffff8800b7bdf250 ffff8800b7bdee92 1ffff100393f2f82 ffff8801da2f5a98 [ 106.864561] ffff8801d658ab80 0000000041b58ab3 ffffffff8424e778 ffffffff835ad740 [ 106.872550] Call Trace: [ 106.875116] [] ? pppol2tp_connect+0x7fb/0x1910 [ 106.881331] [] ? pppol2tp_recv+0x320/0x320 [ 106.887369] [] ? security_socket_connect+0x8f/0xc0 [ 106.893932] [] SYSC_connect+0x1b8/0x300 [ 106.899533] [] ? SYSC_bind+0x280/0x280 [ 106.905049] [] ? get_unused_fd_flags+0xd0/0xd0 [ 106.911266] [] ? do_futex+0x17f0/0x17f0 [ 106.916894] [] ? __fget+0x16f/0x3b0 [ 106.922160] [] ? __fget+0x47/0x3b0 [ 106.927334] [] SyS_connect+0x24/0x30 [ 106.932725] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 106.939282] Code: fd 80 3d e0 75 45 01 00 0f 84 44 09 00 00 e8 65 66 da fd 49 8d be d8 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 60 0d 00 00 4d 8b be d8 01 00 00 e8 57 c5 cc [ 106.966439] RIP [] pppol2tp_connect+0x873/0x1910 [ 106.972954] RSP [ 106.978009] ---[ end trace 774a0a230f675e3b ]--- [ 106.982764] Kernel panic - not syncing: Fatal exception [ 106.988373] Dumping ftrace buffer: [ 106.991892] (ftrace buffer empty) [ 106.995576] Kernel Offset: disabled [ 106.999186] Rebooting in 86400 seconds..