[ 15.145115] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.469136] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.728930] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.658863] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) [ 22.827408] random: sshd: uninitialized urandom read (32 bytes read, 123 bits of entropy available) [ 27.410018] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program [ 28.322551] l2tp_core: tunl 2: sockfd_lookup(fd=5) returned -9 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.414205] l2tp_core: tunl 2: sockfd_lookup(fd=5) returned -9 [ 28.433919] l2tp_core: tunl 2: sockfd_lookup(fd=5) returned -9 executing program executing program executing program [ 28.492428] l2tp_core: tunl 2: sockfd_lookup(fd=5) returned -9 [ 28.511550] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program [ 28.536774] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 28.563474] l2tp_core: tunl 2: sockfd_lookup(fd=5) returned -9 [ 28.582831] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 28.591078] IP: [<ffffffff8345c75e>] l2tp_session_create+0x93e/0x10f0 [ 28.597763] PGD 80000000b5243067 PUD b478b067 PMD 0 [ 28.603207] Oops: 0002 [#1] PREEMPT SMP KASAN [ 28.608131] Dumping ftrace buffer: [ 28.611641] (ftrace buffer empty) [ 28.615323] Modules linked in: [ 28.618605] CPU: 0 PID: 3401 Comm: syzkaller303461 Not tainted 4.4.113-ge70c132 #27 [ 28.626367] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.635692] task: ffff8800b3c817c0 task.stack: ffff8800b4780000 [ 28.641719] RIP: 0010:[<ffffffff8345c75e>] [<ffffffff8345c75e>] l2tp_session_create+0x93e/0x10f0 [ 28.650820] RSP: 0018:ffff8800b4787ad0 EFLAGS: 00010246 [ 28.656248] RAX: 0000000000000000 RBX: ffff8800b4534a00 RCX: ffffffff83455d76 [ 28.663488] RDX: 1ffff100168a6970 RSI: 0000000000000002 RDI: ffff8800b4534b80 [ 28.670730] RBP: ffff8800b4787b40 R08: ffff8800b4534810 R09: 0000000000000000 [ 28.677971] R10: ffffffff85700640 R11: ffffffff84418100 R12: ffff8800b4534828 [ 28.685210] R13: ffff8800b4787c58 R14: ffff8800b4534ae0 R15: ffff8800b4534780 [ 28.692461] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7733b40 [ 28.700655] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.706506] CR2: 0000000000000080 CR3: 00000000b7f50000 CR4: 0000000000160670 [ 28.713749] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.721000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.728237] Stack: [ 28.730355] ffffffff8113bd8a ffff8800b4534a20 ffff8800b45348d8 ffff8800b4787b00 [ 28.738318] ffff8800b4534790 0000000000000000 ffff8800b4534830 ffff8800b45348d0 [ 28.746288] 5e0525fd00000000 0000000000000000 ffff8800b467ee80 0000000000000000 [ 28.754252] Call Trace: [ 28.756810] [<ffffffff8113bd8a>] ? __local_bh_enable_ip+0x6a/0xd0 [ 28.763100] [<ffffffff834604ec>] pppol2tp_connect+0x10fc/0x1930 [ 28.769222] [<ffffffff8345f3f0>] ? pppol2tp_recv+0x330/0x330 [ 28.775097] [<ffffffff814945a4>] ? __might_fault+0xe4/0x1d0 [ 28.780874] [<ffffffff81514328>] ? check_stack_object+0x68/0x140 [ 28.787090] [<ffffffff81b45599>] ? security_socket_connect+0x89/0xb0 [ 28.793662] [<ffffffff82deabd6>] SYSC_connect+0x1b6/0x310 [ 28.799263] [<ffffffff82deaa20>] ? SYSC_bind+0x280/0x280 [ 28.804775] [<ffffffff8149f762>] ? handle_mm_fault+0x3f2/0x3190 [ 28.810889] [<ffffffff815785f3>] ? __alloc_fd+0x1e3/0x500 [ 28.816483] [<ffffffff810dc6f0>] ? __do_page_fault+0x380/0xa00 [ 28.822510] [<ffffffff82ded444>] SyS_connect+0x24/0x30 [ 28.827841] [<ffffffff82ded420>] ? SyS_accept+0x30/0x30 [ 28.833261] [<ffffffff81006d74>] do_fast_syscall_32+0x314/0x890 [ 28.839374] [<ffffffff837734ea>] sysenter_flags_fixed+0xd/0x17 [ 28.845397] Code: 00 00 48 8d bb 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 4f 07 00 00 48 8b 83 80 01 00 00 <f0> ff 80 80 00 00 00 48 8d 43 20 48 89 c7 48 89 45 b8 e8 1b 4b [ 28.871961] RIP [<ffffffff8345c75e>] l2tp_session_create+0x93e/0x10f0 [ 28.878731] RSP <ffff8800b4787ad0> [ 28.882326] CR2: 0000000000000080 [ 28.886522] ---[ end trace db8a13e85f713859 ]--- [ 28.891584] Kernel panic - not syncing: Fatal exception [ 28.897335] Dumping ftrace buffer: [ 28.900851] (ftrace buffer empty) [ 28.904533] Kernel Offset: disabled [ 28.908126] Rebooting in 86400 seconds..