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-4,10.128.0.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.441253] ------------[ cut here ]------------ [ 31.446086] WARNING: CPU: 1 PID: 2983 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 [ 31.454172] Kernel panic - not syncing: panic_on_warn set ... [ 31.454172] [ 31.461516] CPU: 1 PID: 2983 Comm: syzkaller963820 Not tainted 4.14.0-rc1+ #69 [ 31.468849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.478176] Call Trace: [ 31.480747] dump_stack+0x194/0x257 [ 31.484355] ? arch_local_irq_restore+0x53/0x53 [ 31.489014] panic+0x1e4/0x417 [ 31.492181] ? __warn+0x1d9/0x1d9 [ 31.495606] ? show_regs_print_info+0x65/0x65 [ 31.500088] ? kmalloc_slab+0x5d/0x70 [ 31.503862] __warn+0x1c4/0x1d9 [ 31.507111] ? kmalloc_slab+0x5d/0x70 [ 31.510888] report_bug+0x211/0x2d0 [ 31.514495] fixup_bug+0x40/0x90 [ 31.517837] do_trap+0x260/0x390 [ 31.521181] do_error_trap+0x120/0x390 [ 31.525044] ? do_trap+0x390/0x390 [ 31.528558] ? kmalloc_slab+0x5d/0x70 [ 31.532332] ? lock_release+0xd70/0xd70 [ 31.536287] ? ipv6_dev_get_saddr+0x2ae/0xa20 [ 31.540757] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.545578] do_invalid_op+0x1b/0x20 [ 31.549265] invalid_op+0x18/0x20 [ 31.552691] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 31.557069] RSP: 0018:ffff8801ce0474b0 EFLAGS: 00010246 [ 31.562406] RAX: 0000000000000000 RBX: ffff8801ce047748 RCX: 0000000000000007 [ 31.569647] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 31.576888] RBP: ffff8801ce0474b0 R08: ffff8801d7ac1700 R09: ffff8801ce047b10 [ 31.584129] R10: ffff8801cf294040 R11: 0000000000000000 R12: ffff8801ce047ab0 [ 31.591373] R13: ffff8801ce047b10 R14: 00000000014080c0 R15: ffff8801ce4027c0 [ 31.598636] __kmalloc+0x25/0x760 [ 31.602064] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 31.606706] ? ip6_setup_cork+0x1e8/0x15c0 [ 31.610921] ip6_setup_cork+0x1e8/0x15c0 [ 31.614964] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 31.620220] ip6_make_skb+0x282/0x530 [ 31.623996] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.628291] ? ip6_push_pending_frames+0xe0/0xe0 [ 31.633025] ? ip6_dst_hoplimit+0x10d/0x420 [ 31.637322] ? ip6_route_output_flags+0x1f1/0x2b0 [ 31.642147] ? __lock_is_held+0xbc/0x140 [ 31.646193] ? ip6_dst_hoplimit+0xc1/0x420 [ 31.650401] ? ip6_find_1stfragopt+0x240/0x240 [ 31.654964] udpv6_sendmsg+0x2769/0x3380 [ 31.659000] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.663307] ? udpv6_setsockopt+0x80/0x80 [ 31.667424] ? find_held_lock+0x39/0x1d0 [ 31.671465] ? lock_downgrade+0x990/0x990 [ 31.675585] ? lock_downgrade+0x990/0x990 [ 31.679708] ? lock_release+0xd70/0xd70 [ 31.683665] ? do_raw_spin_trylock+0x190/0x190 [ 31.688224] ? __local_bh_enable_ip+0x9d/0x160 [ 31.692783] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.697772] ? release_sock+0x1d4/0x2a0 [ 31.701727] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.706105] ? release_sock+0x1d4/0x2a0 [ 31.710057] ? udp_v6_get_port+0x9c/0xc0 [ 31.714097] inet_sendmsg+0x11f/0x5e0 [ 31.717866] ? inet_sendmsg+0x11f/0x5e0 [ 31.721812] ? __might_sleep+0x95/0x190 [ 31.725759] ? inet_recvmsg+0x5f0/0x5f0 [ 31.729709] ? selinux_socket_sendmsg+0x36/0x40 [ 31.734351] ? security_socket_sendmsg+0x89/0xb0 [ 31.739082] ? inet_recvmsg+0x5f0/0x5f0 [ 31.743030] sock_sendmsg+0xca/0x110 [ 31.746719] SYSC_sendto+0x358/0x5a0 [ 31.750409] ? SYSC_connect+0x480/0x480 [ 31.754353] ? __handle_mm_fault+0x39c0/0x39c0 [ 31.758917] ? up_read+0x1a/0x40 [ 31.762259] ? __do_page_fault+0x35b/0xb60 [ 31.766479] ? __do_page_fault+0xb60/0xb60 [ 31.770697] ? lockdep_sys_exit+0x47/0xf0 [ 31.774816] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 31.779631] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.784623] SyS_sendto+0x40/0x50 [ 31.788052] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.792778] RIP: 0033:0x43fea9 [ 31.795939] RSP: 002b:00007ffd48558cc8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 31.803620] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 31.810864] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 31.818109] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c [ 31.825349] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 31.832593] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 31.840363] Dumping ftrace buffer: [ 31.843949] (ftrace buffer empty) [ 31.847635] Kernel Offset: disabled [ 31.851247] Rebooting in 86400 seconds..