INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.612904] kasan: CONFIG_KASAN_INLINE enabled [ 46.617324] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 46.630170] Dumping ftrace buffer: [ 46.633681] (ftrace buffer empty) [ 46.637361] Modules linked in: [ 46.640643] CPU: 1 PID: 2113 Comm: syz-executor225 Not tainted 4.4.153+ #28 [ 46.647922] task: ffff8801d33e97c0 task.stack: ffff8801d2590000 [ 46.653965] RIP: 0010:[] [] udpv6_queue_rcv_skb+0x18f/0x1510 [ 46.663126] RSP: 0018:ffff8801d2597860 EFLAGS: 00010206 [ 46.668551] RAX: dffffc0000000000 RBX: ffff8801d2a28000 RCX: 0000000000000000 [ 46.675802] RDX: 000000000000000c RSI: ffffffff8257b916 RDI: 0000000000000060 [ 46.683052] RBP: ffff8801d25978a0 R08: 0000000000000001 R09: 0000000000000001 [ 46.690299] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8801d2ea7dc0 [ 46.697550] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801d2ea7e18 [ 46.704796] FS: 0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:00000000095ce840 [ 46.712999] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 46.718855] CR2: 0000000020184000 CR3: 00000001d4db7000 CR4: 00000000001606b0 [ 46.726104] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.733349] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.740591] Stack: [ 46.742713] 00000001d2a28088 ffff8801d2ea7dc0 ffff8801d2a28088 ffff8801d2a28000 [ 46.750700] ffff8801d2ea7dc0 dffffc0000000000 ffff8801d2ea7e18 0000000000000000 [ 46.758804] ffff8801d2597910 ffffffff82154b3b ffff8801d2a28430 ffff8801d2a28188 [ 46.766790] Call Trace: [ 46.769357] [] release_sock+0x17b/0x500 [ 46.775065] [] udpv6_sendmsg+0x917/0x24c0 [ 46.780939] [] ? udp_lib_close+0x20/0x20 [ 46.786626] [] ? udp_v6_flush_pending_frames+0xe0/0xe0 [ 46.793530] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 46.800305] [] ? trace_hardirqs_on+0x10/0x10 [ 46.806390] [] ? sock_has_perm+0x1c1/0x3f0 [ 46.812255] [] ? sock_has_perm+0x2a1/0x3f0 [ 46.818120] [] ? sock_has_perm+0x9f/0x3f0 [ 46.823891] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 46.831404] [] ? selinux_socket_bind+0x12c/0x710 [ 46.837789] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 46.844523] [] ? check_preemption_disabled+0x3b/0x170 [ 46.851352] [] ? inet_sendmsg+0x143/0x4d0 [ 46.857132] [] inet_sendmsg+0x203/0x4d0 [ 46.862731] [] ? inet_sendmsg+0x73/0x4d0 [ 46.868421] [] ? inet_recvmsg+0x4c0/0x4c0 [ 46.874198] [] sock_sendmsg+0xbb/0x110 [ 46.879717] [] SyS_sendto+0x220/0x370 [ 46.885143] [] ? SyS_getpeername+0x2d0/0x2d0 [ 46.891173] [] ? inet6_bind+0x13b/0xf50 [ 46.896771] [] ? SyS_bind+0x18a/0x280 [ 46.902243] [] ? SyS_socketpair+0x520/0x520 [ 46.908201] [] ? get_unused_fd_flags+0xd0/0xd0 [ 46.914413] [] ? SyS_socket+0x14a/0x1f0 [ 46.920017] [] ? move_addr_to_kernel+0x50/0x50 [ 46.926225] [] ? __do_page_fault+0x2b6/0x7e0 [ 46.932339] [] ? do_fast_syscall_32+0xdb/0x8b0 [ 46.938568] [] ? SyS_getpeername+0x2d0/0x2d0 [ 46.944606] [] do_fast_syscall_32+0x31e/0x8b0 [ 46.950733] [] sysenter_flags_fixed+0xd/0x1a [ 46.956765] 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 [ 46.983744] RIP [] udpv6_queue_rcv_skb+0x18f/0x1510 [ 46.990535] RSP [ 46.994210] ---[ end trace 9d3743a0dece9503 ]--- [ 46.998945] Kernel panic - not syncing: Fatal exception in interrupt [ 47.005733] Dumping ftrace buffer: [ 47.009249] (ftrace buffer empty) [ 47.012933] Kernel Offset: disabled [ 47.016534] Rebooting in 86400 seconds..