Starting mcstransd: [ 20.781692] random: sshd: uninitialized urandom read (32 bytes read, 34 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: [ 25.472695] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 25.801159] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 26.772063] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. 2018/03/06 20:08:59 parsed 1 programs 2018/03/06 20:08:59 executed programs: 0 [ 32.681259] IPVS: Creating netns size=2552 id=1 [ 32.728624] IPVS: Creating netns size=2552 id=2 [ 32.792297] IPVS: Creating netns size=2552 id=3 [ 32.861609] IPVS: Creating netns size=2552 id=4 [ 32.951860] IPVS: Creating netns size=2552 id=5 [ 33.056879] IPVS: Creating netns size=2552 id=6 [ 33.166321] IPVS: Creating netns size=2552 id=7 [ 33.331549] IPVS: Creating netns size=2552 id=8 2018/03/06 20:09:05 executed programs: 8 [ 40.625212] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ffffffff8330612a [ 40.625212] [ 40.636256] CPU: 0 PID: 6284 Comm: syz-executor0 Not tainted 4.4.120-gd63fdf6 #29 [ 40.643856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.653200] 0000000000000000 b9ea9f169a0ff0f1 ffff8800b76df5d8 ffffffff81d0408d [ 40.661218] ffffffff83843960 ffff8800b76df6b0 000000000000ffff ffff8800b0ec04e4 [ 40.669184] 0000000000000040 ffff8800b76df6a0 ffffffff8141ab2a 0000000041b58ab3 [ 40.677147] Call Trace: [ 40.679710] [] dump_stack+0xc1/0x124 [ 40.685046] [] panic+0x1aa/0x388 [ 40.690035] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 40.696933] [] ? ip_mc_output+0x980/0x980 [ 40.702701] [] ? ip_fragment.constprop.49+0x200/0x200 [ 40.709509] [] ? ip6_xmit+0x16ba/0x1a70 [ 40.715103] [] ? __stack_chk_fail+0xa/0x30 [ 40.720956] [] ? ip6_xmit+0x16ba/0x1a70 [ 40.726546] [] __stack_chk_fail+0x22/0x30 [ 40.732313] [] ip6_xmit+0x16ba/0x1a70 [ 40.737732] [] ? kfree+0xfc/0x300 [ 40.742807] [] ? pskb_expand_head+0x28b/0x980 [ 40.748923] [] ? l2tp_xmit_skb+0xa5e/0xea0 [ 40.754778] [] ? ip6_finish_output2+0x1c60/0x1c60 [ 40.761239] [] ? __lock_is_held+0xa1/0xf0 [ 40.767006] [] ? ipv4_dst_check+0x111/0x160 [ 40.772946] [] ? ip6_forward_finish+0x150/0x150 [ 40.780797] [] inet6_csk_xmit+0x246/0x480 [ 40.786565] [] ? inet6_csk_xmit+0x100/0x480 [ 40.792518] [] ? inet6_csk_update_pmtu+0x160/0x160 [ 40.799066] [] ? udp6_set_csum+0x336/0xa80 [ 40.804922] [] l2tp_xmit_skb+0xc2f/0xea0 [ 40.810603] [] pppol2tp_sendmsg+0x584/0x7f0 [ 40.816548] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 40.823009] [] ? pppol2tp_release+0x310/0x310 [ 40.829128] [] sock_sendmsg+0xca/0x110 [ 40.834635] [] ___sys_sendmsg+0x6c1/0x7c0 [ 40.840405] [] ? copy_msghdr_from_user+0x550/0x550 [ 40.846954] [] ? __fget+0x23a/0x3b0 [ 40.852212] [] ? __fget+0x47/0x3b0 [ 40.857378] [] ? __fget_light+0xa3/0x1e0 [ 40.863067] [] ? __fdget+0x18/0x20 [ 40.868230] [] ? sockfd_lookup_light+0x118/0x160 [ 40.874606] [] __sys_sendmsg+0xd3/0x190 [ 40.880211] [] ? SyS_shutdown+0x1b0/0x1b0 [ 40.885980] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 40.892105] [] ? move_addr_to_kernel+0x50/0x50 [ 40.898329] [] compat_SyS_sendmsg+0x2a/0x40 [ 40.904275] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 40.910826] [] do_fast_syscall_32+0x321/0x8a0 [ 40.916944] [] sysenter_flags_fixed+0xd/0x17 [ 40.923539] Dumping ftrace buffer: [ 40.927106] (ftrace buffer empty) [ 40.930786] Kernel Offset: disabled [ 40.934397] Rebooting in 86400 seconds..