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-kasan-gce-8,10.128.15.197' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.539429] ------------[ cut here ]------------ [ 42.544254] WARNING: CPU: 0 PID: 2984 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 42.552273] Kernel panic - not syncing: panic_on_warn set ... [ 42.552273] [ 42.559606] CPU: 0 PID: 2984 Comm: syzkaller075261 Not tainted 4.14.0-rc4+ #130 [ 42.567023] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.576346] Call Trace: [ 42.578908] dump_stack+0x194/0x257 [ 42.582509] ? arch_local_irq_restore+0x53/0x53 [ 42.587163] panic+0x1e4/0x417 [ 42.590328] ? __warn+0x1d9/0x1d9 [ 42.593751] ? show_regs_print_info+0x65/0x65 [ 42.598234] ? kmalloc_slab+0x5d/0x70 [ 42.602005] __warn+0x1c4/0x1d9 [ 42.605256] ? kmalloc_slab+0x5d/0x70 [ 42.609031] report_bug+0x211/0x2d0 [ 42.612643] fixup_bug+0x40/0x90 [ 42.615984] do_trap+0x260/0x390 [ 42.619328] do_error_trap+0x120/0x390 [ 42.623193] ? do_trap+0x390/0x390 [ 42.626705] ? kmalloc_slab+0x5d/0x70 [ 42.630478] ? lock_release+0xd70/0xd70 [ 42.634433] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.639254] do_invalid_op+0x1b/0x20 [ 42.642943] invalid_op+0x18/0x20 [ 42.646372] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 42.650750] RSP: 0018:ffff8801ce60f4b0 EFLAGS: 00010246 [ 42.656086] RAX: 0000000000000000 RBX: ffff8801ce60f748 RCX: 0000000000000007 [ 42.663326] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 42.670565] RBP: ffff8801ce60f4b0 R08: ffff8801d195b1c0 R09: ffff8801ce60fb10 [ 42.677806] R10: ffff8801cf32e040 R11: 0000000000000000 R12: ffff8801ce60fab0 [ 42.685048] R13: ffff8801ce60fb10 R14: 00000000014080c0 R15: ffff8801d04097c0 [ 42.692309] __kmalloc+0x25/0x760 [ 42.695738] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 42.700376] ? ip6_setup_cork+0x1e8/0x15c0 [ 42.704584] ip6_setup_cork+0x1e8/0x15c0 [ 42.708623] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 42.713879] ip6_make_skb+0x282/0x530 [ 42.717651] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.721945] ? ip6_push_pending_frames+0xe0/0xe0 [ 42.726671] ? ip6_dst_hoplimit+0x10d/0x420 [ 42.730966] ? ip6_route_output_flags+0x1f1/0x2b0 [ 42.735793] ? __lock_is_held+0xbc/0x140 [ 42.739839] ? ip6_dst_hoplimit+0xc1/0x420 [ 42.744046] ? ip6_find_1stfragopt+0x240/0x240 [ 42.748608] udpv6_sendmsg+0x2769/0x3380 [ 42.752645] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.756952] ? udpv6_setsockopt+0x80/0x80 [ 42.761068] ? find_held_lock+0x39/0x1d0 [ 42.765113] ? lock_downgrade+0x990/0x990 [ 42.769231] ? lock_downgrade+0x990/0x990 [ 42.773350] ? lock_release+0xd70/0xd70 [ 42.777306] ? do_raw_spin_trylock+0x190/0x190 [ 42.781866] ? __local_bh_enable_ip+0x9d/0x160 [ 42.786420] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.791408] ? release_sock+0x1d4/0x2a0 [ 42.795356] ? _raw_spin_unlock_bh+0x30/0x40 [ 42.799735] ? release_sock+0x1d4/0x2a0 [ 42.803689] ? udp_v6_get_port+0x9c/0xc0 [ 42.807728] inet_sendmsg+0x11f/0x5e0 [ 42.811496] ? inet_sendmsg+0x11f/0x5e0 [ 42.815441] ? __might_sleep+0x95/0x190 [ 42.819389] ? inet_recvmsg+0x5f0/0x5f0 [ 42.823339] ? selinux_socket_sendmsg+0x36/0x40 [ 42.827980] ? security_socket_sendmsg+0x89/0xb0 [ 42.832706] ? inet_recvmsg+0x5f0/0x5f0 [ 42.836652] sock_sendmsg+0xca/0x110 [ 42.840340] SYSC_sendto+0x358/0x5a0 [ 42.844031] ? SYSC_connect+0x480/0x480 [ 42.847988] ? mm_fault_error+0x2c0/0x2c0 [ 42.852110] ? ipv6_setsockopt+0xa8/0x150 [ 42.856236] ? __do_page_fault+0xd60/0xd60 [ 42.860456] ? lockdep_sys_exit+0x47/0xf0 [ 42.864575] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 42.869393] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.874383] SyS_sendto+0x40/0x50 [ 42.877810] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.882535] RIP: 0033:0x43fea9 [ 42.885698] RSP: 002b:00007ffd47782928 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 42.893377] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 42.900616] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 42.907853] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 42.915094] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 42.922332] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 42.929754] Dumping ftrace buffer: [ 42.933309] (ftrace buffer empty) [ 42.936991] Kernel Offset: disabled [ 42.940595] Rebooting in 86400 seconds..