[ 14.378956] 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: [ 21.285113] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 21.790949] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 22.514482] random: sshd: uninitialized urandom read (32 bytes read, 94 bits of entropy available) [ 23.593115] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available) Warning: Permanently added 'ci-android-44-kasan-gce-3,10.128.15.213' (ECDSA) to the list of known hosts. [ 29.053538] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available) executing program [ 29.155589] ------------[ cut here ]------------ [ 29.160383] WARNING: CPU: 1 PID: 3316 at net/core/dev.c:2448 skb_warn_bad_offload+0x25b/0x390() [ 29.169216] lo: caps=(0x00000014401b7c69, 0x0000000000000000) len=2105 data_len=2043 gso_size=1992 gso_type=2 ip_summed=0 [ 29.180388] Kernel panic - not syncing: panic_on_warn set ... [ 29.180388] [ 29.187716] CPU: 1 PID: 3316 Comm: syzkaller150979 Not tainted 4.4.104-ged884eb #2 [ 29.195385] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.204709] 0000000000000000 4b0eaeb13863647d ffff8800b8ab6f50 ffffffff81cc9b0f [ 29.212657] ffffffff83842ac0 ffff8800b8ab7028 ffff8800b8ab7018 ffffffff813fc616 [ 29.220601] 0000000041b58ab3 ffffffff83fa5588 ffffffff813fc48f 000000000000006d [ 29.228551] Call Trace: [ 29.231103] [] dump_stack+0x8e/0xcf [ 29.236342] [] panic+0x187/0x2f1 [ 29.241324] [] ? percpu_up_read.constprop.46+0xc3/0xc3 [ 29.248214] [] warn_slowpath_common+0x108/0x120 [ 29.254494] [] ? skb_warn_bad_offload+0x25b/0x390 [ 29.260948] [] warn_slowpath_fmt+0xa7/0xf0 [ 29.266791] [] ? warn_slowpath_common+0x120/0x120 [ 29.273251] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 29.280146] [] ? ___ratelimit+0x1d8/0x3c0 [ 29.285909] [] skb_warn_bad_offload+0x25b/0x390 [ 29.292193] [] __skb_gso_segment+0x346/0x460 [ 29.298212] [] validate_xmit_skb.isra.100.part.101+0x3fb/0x950 [ 29.305795] [] __dev_queue_xmit+0x1148/0x19e0 [ 29.311900] [] ? __dev_queue_xmit+0x199/0x19e0 [ 29.318093] [] ? netdev_pick_tx+0x2c0/0x2c0 [ 29.324028] [] ? mark_held_locks+0xaf/0x100 [ 29.329964] [] ? memcpy+0x36/0x40 [ 29.335029] [] dev_queue_xmit+0xb/0x10 [ 29.340530] [] neigh_resolve_output+0x406/0x750 [ 29.346824] [] ? ip6_finish_output2+0x90b/0x1bf0 [ 29.353190] [] ip6_finish_output2+0x90b/0x1bf0 [ 29.359382] [] ? ip6_finish_output2+0x1d2/0x1bf0 [ 29.365749] [] ? ip6_sk_dst_lookup_flow+0x590/0x590 [ 29.372376] [] ? __lock_is_held+0xa1/0xf0 [ 29.378132] [] ? ip6_mtu+0x1c5/0x2d0 [ 29.383456] [] ip6_finish_output+0x293/0x700 [ 29.389472] [] ip6_output+0x170/0x5b0 [ 29.394886] [] ? __ip6_local_out+0x27b/0x510 [ 29.400906] [] ? ip6_finish_output+0x700/0x700 [ 29.407099] [] ? ip6_fragment+0x3710/0x3710 [ 29.413030] [] ip6_local_out+0x78/0x130 [ 29.418613] [] ip6_send_skb+0x92/0x300 [ 29.424114] [] udp_v6_send_skb+0x2de/0x1110 [ 29.430057] [] udp_v6_push_pending_frames+0x203/0x310 [ 29.436872] [] ? mark_held_locks+0xaf/0x100 [ 29.442807] [] ? udpv6_destroy_sock+0xa0/0xa0 [ 29.448915] [] udpv6_sendmsg+0x1bad/0x2360 [ 29.454763] [] ? avc_has_perm+0x242/0x4a0 [ 29.460527] [] ? ip_reply_glue_bits+0x90/0x90 [ 29.466634] [] ? udp6_lib_lookup+0x20/0x20 [ 29.472486] [] ? avc_has_perm_noaudit+0x420/0x420 [ 29.478943] [] ? sock_has_perm+0x1a0/0x390 [ 29.484793] [] ? sock_has_perm+0x24a/0x390 [ 29.490639] [] ? sock_has_perm+0x99/0x390 [ 29.496400] [] ? __lock_is_held+0xa1/0xf0 [ 29.502160] [] ? inet_sendmsg+0x1c5/0x430 [ 29.507920] [] inet_sendmsg+0x26c/0x430 [ 29.513504] [] ? inet_sendmsg+0x6e/0x430 [ 29.519177] [] ? security_socket_sendmsg+0x6a/0xa0 [ 29.525719] [] ? inet_recvmsg+0x490/0x490 [ 29.531486] [] sock_sendmsg+0xb5/0xf0 [ 29.536907] [] ___sys_sendmsg+0x66d/0x7d0 [ 29.542664] [] ? copy_msghdr_from_user+0x590/0x590 [ 29.549204] [] ? __lock_is_held+0xa1/0xf0 [ 29.554963] [] ? _raw_spin_unlock+0x2c/0x50 [ 29.560895] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 29.567607] [] ? __fget_light+0x12f/0x1b0 [ 29.573364] [] ? __fdget+0xe/0x10 [ 29.578427] [] __sys_sendmsg+0xc3/0x160 [ 29.584013] [] ? SyS_shutdown+0x190/0x190 [ 29.589774] [] ? __do_page_fault+0x2f0/0x910 [ 29.595793] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 29.602334] [] SyS_sendmsg+0xd/0x20 [ 29.607583] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 29.614262] Dumping ftrace buffer: [ 29.617818] (ftrace buffer empty) [ 29.621490] Kernel Offset: disabled [ 29.625095] Rebooting in 86400 seconds..