INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?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 Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.075761] kasan: CONFIG_KASAN_INLINE enabled [ 36.080198] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.093146] Dumping ftrace buffer: [ 36.096659] (ftrace buffer empty) [ 36.100351] Modules linked in: [ 36.103640] CPU: 1 PID: 2245 Comm: syz-executor927 Not tainted 4.4.153+ #92 [ 36.110710] task: ffff8800b0ab17c0 task.stack: ffff8801d79f0000 [ 36.116742] RIP: 0010:[] [] udpv6_queue_rcv_skb+0x18f/0x1510 [ 36.125959] RSP: 0018:ffff8801d79f78d0 EFLAGS: 00010206 [ 36.131389] RAX: dffffc0000000000 RBX: ffff8800b0a98000 RCX: 0000000000000000 [ 36.138643] RDX: 000000000000000c RSI: ffffffff8257b916 RDI: 0000000000000060 [ 36.145915] RBP: ffff8801d79f7910 R08: 0000000000000001 R09: 0000000000000001 [ 36.153165] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8800b4f68280 [ 36.160417] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8800b4f682d8 [ 36.167685] FS: 0000000000b7f880(0063) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 36.175891] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.181753] CR2: 0000000020184000 CR3: 00000000b5a28000 CR4: 00000000001606b0 [ 36.189014] Stack: [ 36.191539] 00000001b0a98088 ffff8800b4f68280 ffff8800b0a98088 ffff8800b0a98000 [ 36.199555] ffff8800b4f68280 dffffc0000000000 ffff8800b4f682d8 0000000000000000 [ 36.207574] ffff8801d79f7980 ffffffff82154b3b ffff8800b0a98430 ffff8800b0a98188 [ 36.215687] Call Trace: [ 36.218256] [] release_sock+0x17b/0x500 [ 36.223859] [] udpv6_sendmsg+0x917/0x24c0 [ 36.229740] [] ? udp_lib_close+0x20/0x20 [ 36.235430] [] ? udp_v6_flush_pending_frames+0xe0/0xe0 [ 36.242355] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 36.249090] [] ? trace_hardirqs_on+0x10/0x10 [ 36.255135] [] ? sock_has_perm+0x1c1/0x3f0 [ 36.261095] [] ? sock_has_perm+0x2a1/0x3f0 [ 36.266974] [] ? sock_has_perm+0x9f/0x3f0 [ 36.272750] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 36.280258] [] ? trace_hardirqs_on+0x10/0x10 [ 36.286296] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 36.293026] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 36.299840] [] ? check_preemption_disabled+0x3b/0x170 [ 36.306682] [] ? inet_sendmsg+0x143/0x4d0 [ 36.312460] [] inet_sendmsg+0x203/0x4d0 [ 36.318066] [] ? inet_sendmsg+0x73/0x4d0 [ 36.323752] [] ? inet_recvmsg+0x4c0/0x4c0 [ 36.329528] [] sock_sendmsg+0xbb/0x110 [ 36.335047] [] SyS_sendto+0x220/0x370 [ 36.340475] [] ? SyS_getpeername+0x2d0/0x2d0 [ 36.346511] [] ? inet6_bind+0x13b/0xf50 [ 36.352112] [] ? SyS_bind+0x18a/0x280 [ 36.357617] [] ? SyS_socketpair+0x520/0x520 [ 36.363575] [] ? get_unused_fd_flags+0xd0/0xd0 [ 36.369784] [] ? SyS_socket+0x14a/0x1f0 [ 36.375395] [] ? move_addr_to_kernel+0x50/0x50 [ 36.381632] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 36.388109] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 36.394678] Code: 74 24 58 41 f6 c6 01 0f 85 24 08 00 00 e8 2a 8a d7 fe 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 d0 0e 00 00 41 f6 46 60 04 [ 36.421871] RIP [] udpv6_queue_rcv_skb+0x18f/0x1510 [ 36.428657] RSP [ 36.432310] ---[ end trace 9315ffaea049a1a8 ]--- [ 36.437077] Kernel panic - not syncing: Fatal exception in interrupt [ 36.443872] Dumping ftrace buffer: [ 36.447392] (ftrace buffer empty) [ 36.451079] Kernel Offset: disabled [ 36.454684] Rebooting in 86400 seconds..