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-net-kasan-gce-6,10.128.15.202' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.174508] ------------[ cut here ]------------ [ 31.179305] WARNING: CPU: 1 PID: 2988 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 [ 31.187328] Kernel panic - not syncing: panic_on_warn set ... [ 31.187328] [ 31.194677] CPU: 1 PID: 2988 Comm: syzkaller500931 Not tainted 4.14.0-rc1+ #68 [ 31.202007] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.211333] Call Trace: [ 31.213897] dump_stack+0x194/0x257 [ 31.217502] ? arch_local_irq_restore+0x53/0x53 [ 31.222154] panic+0x1e4/0x417 [ 31.225317] ? __warn+0x1d9/0x1d9 [ 31.228738] ? show_regs_print_info+0x65/0x65 [ 31.233218] ? kmalloc_slab+0x5d/0x70 [ 31.236987] __warn+0x1c4/0x1d9 [ 31.240237] ? kmalloc_slab+0x5d/0x70 [ 31.244011] report_bug+0x211/0x2d0 [ 31.247615] fixup_bug+0x40/0x90 [ 31.250953] do_trap+0x260/0x390 [ 31.254296] do_error_trap+0x120/0x390 [ 31.258157] ? do_trap+0x390/0x390 [ 31.261669] ? kmalloc_slab+0x5d/0x70 [ 31.265442] ? lock_release+0xd70/0xd70 [ 31.269388] ? ipv6_dev_get_saddr+0x2ae/0xa20 [ 31.273857] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.278677] do_invalid_op+0x1b/0x20 [ 31.282358] invalid_op+0x18/0x20 [ 31.285780] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 31.290154] RSP: 0018:ffff8801d01a74b0 EFLAGS: 00010246 [ 31.295490] RAX: 0000000000000000 RBX: ffff8801d01a7748 RCX: 0000000000000007 [ 31.302735] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 31.309972] RBP: ffff8801d01a74b0 R08: ffff8801d3be21c0 R09: ffff8801d01a7b10 [ 31.317211] R10: ffff8801cebcc340 R11: 0000000000000000 R12: ffff8801d01a7ab0 [ 31.324452] R13: ffff8801d01a7b10 R14: 00000000014080c0 R15: ffff8801ce5407c0 [ 31.331716] __kmalloc+0x25/0x760 [ 31.335144] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 31.339782] ? ip6_setup_cork+0x1e8/0x15c0 [ 31.343990] ip6_setup_cork+0x1e8/0x15c0 [ 31.348028] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 31.353286] ip6_make_skb+0x282/0x530 [ 31.357058] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.361352] ? ip6_push_pending_frames+0xe0/0xe0 [ 31.366079] ? ip6_dst_hoplimit+0x10d/0x420 [ 31.370374] ? ip6_route_output_flags+0x1f1/0x2b0 [ 31.375197] ? __lock_is_held+0xbc/0x140 [ 31.379240] ? ip6_dst_hoplimit+0xc1/0x420 [ 31.383448] ? ip6_find_1stfragopt+0x240/0x240 [ 31.388009] udpv6_sendmsg+0x2769/0x3380 [ 31.392044] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.396348] ? udpv6_setsockopt+0x80/0x80 [ 31.400466] ? find_held_lock+0x39/0x1d0 [ 31.404509] ? lock_downgrade+0x990/0x990 [ 31.408625] ? lock_downgrade+0x990/0x990 [ 31.412743] ? lock_release+0xd70/0xd70 [ 31.416697] ? do_raw_spin_trylock+0x190/0x190 [ 31.421254] ? __local_bh_enable_ip+0x9d/0x160 [ 31.425807] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.430792] ? release_sock+0x1d4/0x2a0 [ 31.434741] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.439118] ? release_sock+0x1d4/0x2a0 [ 31.443072] ? udp_v6_get_port+0x9c/0xc0 [ 31.447110] inet_sendmsg+0x11f/0x5e0 [ 31.450887] ? inet_sendmsg+0x11f/0x5e0 [ 31.454834] ? __might_sleep+0x95/0x190 [ 31.458778] ? inet_recvmsg+0x5f0/0x5f0 [ 31.462723] ? selinux_socket_sendmsg+0x36/0x40 [ 31.467360] ? security_socket_sendmsg+0x89/0xb0 [ 31.472084] ? inet_recvmsg+0x5f0/0x5f0 [ 31.476029] sock_sendmsg+0xca/0x110 [ 31.479715] SYSC_sendto+0x358/0x5a0 [ 31.483401] ? SYSC_connect+0x480/0x480 [ 31.487342] ? __handle_mm_fault+0x39c0/0x39c0 [ 31.491903] ? up_read+0x1a/0x40 [ 31.495240] ? __do_page_fault+0x35b/0xb60 [ 31.499458] ? __do_page_fault+0xb60/0xb60 [ 31.503680] ? lockdep_sys_exit+0x47/0xf0 [ 31.507798] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 31.512611] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.517601] SyS_sendto+0x40/0x50 [ 31.521028] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.525751] RIP: 0033:0x43fea9 [ 31.528911] RSP: 002b:00007ffd3d08ffc8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 31.536593] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 31.543831] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 31.551072] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c [ 31.558310] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 31.565547] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 31.572936] Dumping ftrace buffer: [ 31.576488] (ftrace buffer empty) [ 31.580168] Kernel Offset: disabled [ 31.583769] Rebooting in 86400 seconds..