[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.321407] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.601710] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 27.075061] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 28.261223] random: sshd: uninitialized urandom read (32 bytes read, 89 bits of entropy available) [ 28.435653] random: sshd: uninitialized urandom read (32 bytes read, 92 bits of entropy available) Warning: Permanently added '10.128.10.15' (ECDSA) to the list of known hosts. [ 33.861884] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) [ 33.962468] IPVS: Creating netns size=2552 id=1 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Error: argument "bridge0" is wrong: Device does not exist Error: argument "bridge0" is wrong: Device does not exist [ 34.143836] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 34.159236] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready Error: argument "bond0" is wrong: Device does not exist Error: argument "bond0" is wrong: Device does not exist [ 34.244799] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 34.260094] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready Error: argument "team0" is wrong: Device does not exist Error: argument "team0" is wrong: Device does not exist [ 34.342446] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 34.357747] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 34.374756] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 34.391928] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "team0" Cannot find device "team0" [ 35.144980] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 35.183602] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready Cannot find device "team0" Cannot find device "team0" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 35.543330] kasan: CONFIG_KASAN_INLINE enabled [ 35.547758] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.560664] Dumping ftrace buffer: [ 35.564183] (ftrace buffer empty) [ 35.567868] Modules linked in: [ 35.571161] CPU: 1 PID: 4199 Comm: syz-executor499 Not tainted 4.4.143-g7bbfac1 #77 [ 35.578934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.588272] task: ffff8801d79b1800 task.stack: ffff8800abea0000 [ 35.594305] RIP: 0010:[] [] udpv6_queue_rcv_skb+0x18f/0x1500 [ 35.603469] RSP: 0018:ffff8800abea7890 EFLAGS: 00010206 [ 35.608896] RAX: dffffc0000000000 RBX: ffff8800b9cc0000 RCX: 0000000000000000 [ 35.616246] RDX: 000000000000000c RSI: ffffffff8349b386 RDI: 0000000000000060 [ 35.623533] RBP: ffff8800abea78d0 R08: 0000000000000001 R09: 0000000000000001 [ 35.630785] R10: 0000000000000000 R11: ffff8801d79b1800 R12: ffff8800b355fa00 [ 35.638036] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8800b355fa58 [ 35.645297] FS: 00000000021ce880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 35.653502] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.659376] CR2: 0000000020000040 CR3: 00000000aca74000 CR4: 00000000001606f0 [ 35.666627] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.673881] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.681137] Stack: [ 35.683261] 00000001b9cc0088 ffff8800b355fa00 ffff8800b9cc0088 ffff8800b9cc0000 [ 35.691260] ffff8800b355fa00 dffffc0000000000 ffff8800b355fa58 ffff8800b355f8c0 [ 35.699255] ffff8800abea7940 ffffffff82f2d67b ffff8800b9cc0430 ffff8800b9cc0188 [ 35.707250] Call Trace: [ 35.709814] [] release_sock+0x17b/0x500 [ 35.715416] [] udpv6_sendmsg+0x917/0x24c0 [ 35.721193] [] ? __udpv6_queue_rcv_skb+0x480/0x480 [ 35.727758] [] ? udp6_lib_lookup2+0x990/0x990 [ 35.733895] [] ? debug_check_no_locks_freed+0x210/0x210 [ 35.740894] [] ? sock_has_perm+0x1c1/0x400 [ 35.746765] [] ? sock_has_perm+0x29f/0x400 [ 35.752650] [] ? sock_has_perm+0x9f/0x400 [ 35.758443] [] ? inet_sendmsg+0x143/0x4d0 [ 35.764231] [] inet_sendmsg+0x203/0x4d0 [ 35.769844] [] ? inet_sendmsg+0x73/0x4d0 [ 35.775549] [] ? inet_recvmsg+0x4c0/0x4c0 [ 35.781352] [] sock_sendmsg+0xcc/0x110 [ 35.786889] [] SYSC_sendto+0x21c/0x370 [ 35.792424] [] ? SYSC_connect+0x300/0x300 [ 35.798204] [] ? udp_v6_get_port+0xa7/0xd0 [ 35.804096] [] ? inet6_bind+0x13b/0xf50 [ 35.809698] [] ? SYSC_bind+0x1da/0x280 [ 35.815213] [] ? sock_map_fd+0x53/0x70 [ 35.820744] [] ? SyS_socket+0x121/0x1b0 [ 35.826355] [] ? move_addr_to_kernel+0x50/0x50 [ 35.832574] [] SyS_sendto+0x40/0x50 [ 35.837834] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 35.844388] Code: 74 24 58 41 f6 c6 01 0f 85 e2 07 00 00 e8 9a 61 eb fd 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e c1 0d 00 00 41 f6 46 60 04 [ 35.871517] RIP [] udpv6_queue_rcv_skb+0x18f/0x1500 [ 35.878295] RSP [ 35.881943] ---[ end trace 1ea5dfc70d4a148c ]--- [ 35.886714] Kernel panic - not syncing: Fatal exception in interrupt [ 35.893664] Dumping ftrace buffer: [ 35.897186] (ftrace buffer empty) [ 35.900874] Kernel Offset: disabled [ 35.904481] Rebooting in 86400 seconds..