[ 20.308000] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 20.772223] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 21.002985] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.030404] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) [ 22.196373] random: sshd: uninitialized urandom read (32 bytes read, 125 bits of entropy available) Warning: Permanently added '10.128.0.48' (ECDSA) to the list of known hosts. [ 27.556239] random: nonblocking pool is initialized 2018/03/12 23:42:41 parsed 1 programs 2018/03/12 23:42:41 executed programs: 0 [ 27.895988] IPVS: Creating netns size=2552 id=1 [ 27.927072] ------------[ cut here ]------------ [ 27.931847] WARNING: CPU: 1 PID: 3789 at net/packet/af_packet.c:4122 packet_set_ring+0x1337/0x18d0() [ 27.941107] Tx-ring is not supported. [ 27.944922] Kernel panic - not syncing: panic_on_warn set ... [ 27.944922] [ 27.952254] CPU: 1 PID: 3789 Comm: syz-executor0 Not tainted 4.4.120-gd63fdf6 #29 [ 27.959842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.969165] 0000000000000000 7222d5ec39e8bfdc ffff8800bb2ff908 ffffffff81d0408d [ 27.977134] ffffffff83843b40 ffff8800bb2ff9e0 ffffffff83d20aa0 0000000000000009 [ 27.985099] 000000000000101a ffff8800bb2ff9d0 ffffffff8141ab2a 0000000041b58ab3 [ 27.993061] Call Trace: [ 27.995617] [] dump_stack+0xc1/0x124 [ 28.000951] [] panic+0x1aa/0x388 [ 28.005936] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 28.012833] [] ? warn_slowpath_common+0x10a/0x140 [ 28.019726] [] warn_slowpath_common+0x125/0x140 [ 28.026019] [] ? packet_set_ring+0x1337/0x18d0 [ 28.032220] [] warn_slowpath_fmt+0xc1/0x110 [ 28.038156] [] ? warn_slowpath_common+0x140/0x140 [ 28.044618] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 28.051429] [] ? lock_sock_nested+0x90/0x120 [ 28.057456] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 28.063743] [] ? packet_set_ring+0x131f/0x18d0 [ 28.069941] [] packet_set_ring+0x1337/0x18d0 [ 28.075971] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 28.082534] [] ? __do_page_fault+0x149/0xa00 [ 28.088559] [] ? packet_read_pending.isra.63.part.64+0x190/0x190 [ 28.096330] [] packet_setsockopt+0x568/0x2270 [ 28.102444] [] ? packet_poll+0x5c0/0x5c0 [ 28.108124] [] ? sock_has_perm+0x29f/0x400 [ 28.113975] [] ? sock_has_perm+0x9f/0x400 [ 28.119741] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 28.126809] [] ? selinux_netlbl_socket_setsockopt+0x117/0x320 [ 28.134327] [] ? selinux_netlbl_sock_rcv_skb+0x400/0x400 [ 28.141395] [] ? selinux_socket_setsockopt+0x6d/0x80 [ 28.148114] [] ? security_socket_setsockopt+0x89/0xb0 [ 28.154921] [] compat_SyS_setsockopt+0x22b/0x290 [ 28.161301] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.167849] [] ? vmacache_update+0xfe/0x130 [ 28.173808] [] ? do_fast_syscall_32+0xd7/0x8a0 [ 28.180010] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.186563] [] do_fast_syscall_32+0x321/0x8a0 [ 28.192674] [] sysenter_flags_fixed+0xd/0x17 [ 28.199110] Dumping ftrace buffer: [ 28.202645] (ftrace buffer empty) [ 28.206322] Kernel Offset: disabled [ 28.209927] Rebooting in 86400 seconds..