[ 16.345719] 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: [ 19.791644] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 20.086053] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 20.863885] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available) [ 21.026423] random: sshd: uninitialized urandom read (32 bytes read, 92 bits of entropy available) Warning: Permanently added '10.128.15.209' (ECDSA) to the list of known hosts. [ 26.414182] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) executing program [ 26.517905] ------------[ cut here ]------------ [ 26.522706] WARNING: CPU: 1 PID: 3321 at net/core/dev.c:2449 skb_warn_bad_offload+0x2af/0x390() [ 26.531519] lo: caps=(0x00000014401b7c69, 0x0000000000000000) len=2105 data_len=2043 gso_size=1992 gso_type=2 ip_summed=0 [ 26.542736] Kernel panic - not syncing: panic_on_warn set ... [ 26.542736] [ 26.550091] CPU: 1 PID: 3321 Comm: syzkaller245619 Not tainted 4.4.107-g610c835 #4 [ 26.557777] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.567130] 0000000000000000 8cd0edcd61110b3a ffff8800b0256e88 ffffffff81d0457d [ 26.567136] ffffffff838429a0 ffff8800b0256f60 ffffffff83ca99a0 0000000000000009 [ 26.567143] 0000000000000991 ffff8800b0256f50 ffffffff8141774a 0000000041b58ab3 [ 26.567150] Call Trace: [ 26.567162] [] dump_stack+0xc1/0x124 [ 26.567170] [] panic+0x1aa/0x388 [ 26.567178] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 26.567185] [] ? warn_slowpath_common+0x10a/0x140 [ 26.567191] [] warn_slowpath_common+0x125/0x140 [ 26.567199] [] ? skb_warn_bad_offload+0x2af/0x390 [ 26.567205] [] warn_slowpath_fmt+0xc1/0x110 [ 26.567210] [] ? warn_slowpath_common+0x140/0x140 [ 26.567218] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 26.567224] [] ? ___ratelimit+0x53/0x3e0 [ 26.567231] [] skb_warn_bad_offload+0x2af/0x390 [ 26.567238] [] __skb_gso_segment+0x3b3/0x4a0 [ 26.567245] [] validate_xmit_skb.isra.100.part.101+0x44e/0x970 [ 26.567251] [] ? check_preemption_disabled+0x3b/0x200 [ 26.567258] [] __dev_queue_xmit+0x13cf/0x1a70 [ 26.567264] [] ? __dev_queue_xmit+0x1a6/0x1a70 [ 26.567270] [] ? netdev_pick_tx+0x310/0x310 [ 26.567277] [] ? memcpy+0x45/0x50 [ 26.567283] [] dev_queue_xmit+0x17/0x20 [ 26.567289] [] neigh_resolve_output+0x469/0x770 [ 26.567296] [] ? ip6_finish_output2+0x990/0x1c60 [ 26.567302] [] ? eth_mac_addr+0x1a0/0x1a0 [ 26.567309] [] ip6_finish_output2+0x990/0x1c60 [ 26.567315] [] ? ip6_finish_output2+0x1d5/0x1c60 [ 26.567322] [] ? ip6_sk_dst_lookup_flow+0x590/0x590 [ 26.567327] [] ? ip6_mtu+0x209/0x340 [ 26.567334] [] ip6_finish_output+0x2e6/0x750 [ 26.567340] [] ip6_output+0x1ab/0x520 [ 26.567348] [] ? __ip6_local_out+0x2be/0x4a0 [ 26.567354] [] ? ip6_finish_output+0x750/0x750 [ 26.567361] [] ? ip6_fragment+0x3580/0x3580 [ 26.567367] [] ip6_local_out+0x95/0x170 [ 26.567373] [] ip6_send_skb+0xa1/0x340 [ 26.567380] [] udp_v6_send_skb+0x301/0xeb0 [ 26.567386] [] udp_v6_push_pending_frames+0x22f/0x340 [ 26.567391] [] ? udpv6_destroy_sock+0xd0/0xd0 [ 26.567399] [] ? ip_reply_glue_bits+0xc0/0xc0 [ 26.567404] [] udpv6_sendmsg+0x1f12/0x2500 [ 26.567410] [] ? ip_reply_glue_bits+0xc0/0xc0 [ 26.567416] [] ? udp6_lib_lookup+0x60/0x60 [ 26.567426] [] ? avc_has_perm_noaudit+0x460/0x460 [ 26.567433] [] ? sock_has_perm+0x1c2/0x3e0 [ 26.567439] [] ? sock_has_perm+0x292/0x3e0 [ 26.567445] [] ? sock_has_perm+0x9f/0x3e0 [ 26.567453] [] ? inet_sendmsg+0x201/0x4c0 [ 26.567460] [] inet_sendmsg+0x2bc/0x4c0 [ 26.567465] [] ? inet_sendmsg+0x73/0x4c0 [ 26.567471] [] ? inet_recvmsg+0x4c0/0x4c0 [ 26.567477] [] sock_sendmsg+0xca/0x110 [ 26.567487] [] ___sys_sendmsg+0x6c1/0x7c0 [ 26.567493] [] ? copy_msghdr_from_user+0x550/0x550 [ 26.567500] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 26.567507] [] ? __alloc_pages_direct_compact+0x250/0x250 [ 26.567513] [] ? avc_has_perm_noaudit+0x460/0x460 [ 26.567521] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 26.567528] [] ? __fget_light+0xa1/0x1e0 [ 26.567533] [] ? __fdget+0x18/0x20 [ 26.567539] [] ? sockfd_lookup_light+0x118/0x160 [ 26.567545] [] __sys_sendmsg+0xd3/0x190 [ 26.567551] [] ? SyS_shutdown+0x1b0/0x1b0 [ 26.567558] [] ? __do_page_fault+0x380/0xa00 [ 26.567564] [] compat_SyS_sendmsg+0x2a/0x40 [ 26.567569] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 26.567576] [] do_fast_syscall_32+0x314/0x890 [ 26.567583] [] sysenter_flags_fixed+0xd/0x17 [ 26.574685] Dumping ftrace buffer: [ 26.574746] (ftrace buffer empty) [ 26.574748] Kernel Offset: disabled [ 26.997086] Rebooting in 86400 seconds..