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 'ci-upstream-next-kasan-gce-0,10.128.0.27' (ECDSA) to the list of known hosts. 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 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 syzkaller login: [ 41.383964] multiple allocations for the same socket [ 41.384119] ------------[ cut here ]------------ [ 41.385582] WARNING: CPU: 0 PID: 3326 at net/core/sock_reuseport.c:41 reuseport_alloc+0x306/0x3b0 [ 41.387050] Kernel panic - not syncing: panic_on_warn set ... [ 41.387050] [ 41.388036] CPU: 0 PID: 3326 Comm: syzkaller174872 Not tainted 4.14.0-rc5-next-20171018+ #36 [ 41.389158] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.390398] Call Trace: [ 41.390820] dump_stack+0x194/0x257 [ 41.391314] ? arch_local_irq_restore+0x53/0x53 [ 41.391943] ? vsnprintf+0x1ed/0x1900 [ 41.392462] panic+0x1e4/0x41c [ 41.392898] ? refcount_error_report+0x214/0x214 [ 41.393532] ? show_regs_print_info+0x65/0x65 [ 41.394141] ? __warn+0x1a9/0x1e0 [ 41.394615] ? reuseport_alloc+0x306/0x3b0 [ 41.395181] __warn+0x1c4/0x1e0 [ 41.395626] ? reuseport_alloc+0x306/0x3b0 [ 41.396196] report_bug+0x211/0x2d0 [ 41.396695] fixup_bug+0x40/0x90 [ 41.397152] do_trap+0x260/0x390 [ 41.397614] do_error_trap+0x120/0x390 [ 41.398156] ? do_trap+0x390/0x390 [ 41.398634] ? reuseport_alloc+0x306/0x3b0 [ 41.399201] ? vprintk_emit+0x3ea/0x590 [ 41.399744] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.400393] do_invalid_op+0x1b/0x20 [ 41.400895] invalid_op+0x18/0x20 [ 41.401360] RIP: 0010:reuseport_alloc+0x306/0x3b0 [ 41.402002] RSP: 0018:ffff8801c083fa40 EFLAGS: 00010282 [ 41.402713] RAX: 0000000000000028 RBX: ffff8801d1fc8a80 RCX: 0000000000000000 [ 41.403666] RDX: 0000000000000028 RSI: 1ffff10038107f08 RDI: ffffed0038107f3c [ 41.407235] RBP: ffff8801c083fb10 R08: 0000000000000001 R09: 0000000000000000 [ 41.414470] R10: ffff8801c083f8f8 R11: 0000000000000000 R12: 1ffff10038107f49 [ 41.421706] R13: ffff8801d1fc8a80 R14: ffff8801c083fae8 R15: ffff8801d1fc8eb8 [ 41.428965] ? reuseport_select_sock+0xb60/0xb60 [ 41.433700] ? xdp_do_generic_redirect+0x1110/0x1110 [ 41.438780] __reuseport_attach_prog+0x208/0x280 [ 41.443505] ? bpf_prog_destroy+0x20/0x20 [ 41.447619] ? bpf_prog_store_orig_filter.isra.43+0x147/0x1f0 [ 41.453471] ? _copy_from_user+0x99/0x110 [ 41.457594] ? __get_filter+0xb7/0x220 [ 41.461453] sk_reuseport_attach_filter+0x38/0x80 [ 41.466268] sock_setsockopt+0x164d/0x1ad0 [ 41.470474] ? sock_enable_timestamp+0xb0/0xb0 [ 41.475029] ? handle_mm_fault+0x410/0x8d0 [ 41.479232] ? down_read_trylock+0xdb/0x170 [ 41.483521] ? __do_page_fault+0x31e/0xd60 [ 41.487725] ? __handle_mm_fault+0x39c0/0x39c0 [ 41.492275] ? vmacache_find+0x5f/0x280 [ 41.496224] ? sock_has_perm+0x29c/0x400 [ 41.500251] ? __fget_light+0x297/0x380 [ 41.504197] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 41.509529] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 41.514600] ? selinux_netlbl_socket_setsockopt+0x10c/0x460 [ 41.520278] ? selinux_netlbl_sock_rcv_skb+0x730/0x730 [ 41.525536] ? selinux_socket_setsockopt+0x64/0x80 [ 41.530436] ? security_socket_setsockopt+0x89/0xb0 [ 41.535426] SyS_setsockopt+0x2ff/0x360 [ 41.539371] ? SyS_recv+0x40/0x40 [ 41.542795] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 41.547607] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.552593] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 41.557323] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 41.562047] RIP: 0033:0x445fc9 [ 41.565204] RSP: 002b:00007fc9e6456dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036 [ 41.572877] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445fc9 [ 41.580115] RDX: 0000000000000033 RSI: 0000000000000001 RDI: 000000000000000d [ 41.587351] RBP: 0000000000000082 R08: 0000000000000010 R09: 00007fc9e6457700 [ 41.594586] R10: 0000000020e9bff0 R11: 0000000000000202 R12: 0000000000000000 [ 41.601822] R13: 00007ffe9b7b1fcf R14: 00007fc9e64579c0 R15: 0000000000000000 [ 41.609242] Dumping ftrace buffer: [ 41.612801] (ftrace buffer empty) [ 41.616483] Kernel Offset: disabled [ 41.620081] Rebooting in 86400 seconds..