[ 16.214929] random: sshd: uninitialized urandom read (32 bytes read, 33 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: [ 21.415883] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.791466] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.548277] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) [ 22.711627] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available) Warning: Permanently added 'ci-android-44-kasan-gce-386-3,10.128.0.12' (ECDSA) to the list of known hosts. [ 28.103955] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) executing program [ 28.201873] ------------[ cut here ]------------ [ 28.207145] WARNING: CPU: 0 PID: 3317 at net/packet/af_packet.c:4122 packet_set_ring+0x1337/0x18d0() [ 28.216407] Tx-ring is not supported. [ 28.220266] Kernel panic - not syncing: panic_on_warn set ... [ 28.220266] [ 28.227596] CPU: 0 PID: 3317 Comm: syzkaller849024 Not tainted 4.4.107-g610c835 #4 [ 28.235273] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.244591] 0000000000000000 25cbe8ed8e6c75db ffff8800b4a2f908 ffffffff81d0457d [ 28.252548] ffffffff838429a0 ffff8800b4a2f9e0 ffffffff83d1eaa0 0000000000000009 [ 28.260496] 000000000000101a ffff8800b4a2f9d0 ffffffff8141774a 0000000041b58ab3 [ 28.268466] Call Trace: [ 28.271023] [] dump_stack+0xc1/0x124 [ 28.276359] [] panic+0x1aa/0x388 [ 28.281340] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 28.288232] [] ? warn_slowpath_common+0x10a/0x140 [ 28.294688] [] warn_slowpath_common+0x125/0x140 [ 28.300974] [] ? packet_set_ring+0x1337/0x18d0 [ 28.307171] [] warn_slowpath_fmt+0xc1/0x110 [ 28.313105] [] ? warn_slowpath_common+0x140/0x140 [ 28.319562] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 28.326366] [] ? lock_sock_nested+0x90/0x120 [ 28.332389] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 28.338674] [] ? packet_set_ring+0x131f/0x18d0 [ 28.344872] [] packet_set_ring+0x1337/0x18d0 [ 28.350902] [] ? packet_read_pending.isra.63.part.64+0x190/0x190 [ 28.358663] [] ? check_stack_object+0x68/0x140 [ 28.364859] [] ? __check_object_size+0x154/0x35b [ 28.371234] [] packet_setsockopt+0x568/0x2270 [ 28.377345] [] ? packet_poll+0x5c0/0x5c0 [ 28.383031] [] ? sock_has_perm+0x292/0x3e0 [ 28.388880] [] ? sock_has_perm+0x9f/0x3e0 [ 28.394644] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 28.401710] [] ? selinux_netlbl_socket_setsockopt+0x117/0x320 [ 28.409210] [] ? selinux_netlbl_sock_rcv_skb+0x400/0x400 [ 28.416277] [] ? selinux_socket_setsockopt+0x6d/0x80 [ 28.423000] [] ? security_socket_setsockopt+0x89/0xb0 [ 28.429817] [] compat_SyS_setsockopt+0x22b/0x290 [ 28.436202] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.442834] [] ? do_fast_syscall_32+0xd7/0x890 [ 28.449030] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.455573] [] do_fast_syscall_32+0x314/0x890 [ 28.461685] [] sysenter_flags_fixed+0xd/0x17 [ 28.467843] Dumping ftrace buffer: [ 28.471402] (ftrace buffer empty) [ 28.475077] Kernel Offset: disabled [ 28.478684] Rebooting in 86400 seconds..