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-8,10.128.0.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.813640] ------------[ cut here ]------------ [ 41.818440] WARNING: CPU: 1 PID: 2984 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70 [ 41.826564] Kernel panic - not syncing: panic_on_warn set ... [ 41.826564] [ 41.833902] CPU: 1 PID: 2984 Comm: syzkaller574973 Not tainted 4.14.0-rc4-next-20171009+ #33 [ 41.842446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.851771] Call Trace: [ 41.854334] dump_stack+0x194/0x257 [ 41.857936] ? arch_local_irq_restore+0x53/0x53 [ 41.862589] panic+0x1e4/0x41c [ 41.865752] ? refcount_error_report+0x214/0x214 [ 41.870482] ? show_regs_print_info+0x65/0x65 [ 41.874966] ? kmalloc_slab+0x5d/0x70 [ 41.878737] __warn+0x1c4/0x1e0 [ 41.881987] ? kmalloc_slab+0x5d/0x70 [ 41.885761] report_bug+0x211/0x2d0 [ 41.889365] fixup_bug+0x40/0x90 [ 41.892704] do_trap+0x260/0x390 [ 41.896047] do_error_trap+0x120/0x390 [ 41.899908] ? do_trap+0x390/0x390 [ 41.903420] ? kmalloc_slab+0x5d/0x70 [ 41.907203] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.912024] do_invalid_op+0x1b/0x20 [ 41.915710] invalid_op+0x18/0x20 [ 41.919133] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 41.923509] RSP: 0018:ffff8801ce1974b0 EFLAGS: 00010246 [ 41.928845] RAX: 0000000000000000 RBX: ffff8801ce197748 RCX: 0000000000000007 [ 41.936089] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 41.943331] RBP: ffff8801ce1974b0 R08: ffff8801d18801c0 R09: ffff8801ce197b10 [ 41.950574] R10: ffff8801ce46c200 R11: 0000000000000000 R12: ffff8801ce197ab0 [ 41.957818] R13: ffff8801ce197b10 R14: 00000000014080c0 R15: ffff8801d964f000 [ 41.965079] __kmalloc+0x25/0x760 [ 41.968509] ? inet6_dump_ifaddr+0x30/0x30 [ 41.972714] ? ip6_setup_cork+0x1e8/0x15c0 [ 41.976926] ip6_setup_cork+0x1e8/0x15c0 [ 41.980965] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 41.986230] ip6_make_skb+0x282/0x530 [ 41.990002] ? ip_reply_glue_bits+0xb0/0xb0 [ 41.994295] ? ip6_push_pending_frames+0xe0/0xe0 [ 41.999021] ? ip6_dst_hoplimit+0x10d/0x420 [ 42.003315] ? ip6_route_output_flags+0x1f1/0x2b0 [ 42.008140] ? __lock_is_held+0xbc/0x140 [ 42.012185] ? ip6_dst_hoplimit+0xc1/0x420 [ 42.016397] ? ip6_find_1stfragopt+0x240/0x240 [ 42.020961] udpv6_sendmsg+0x2769/0x3380 [ 42.024997] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.029305] ? udpv6_setsockopt+0x80/0x80 [ 42.033426] ? find_held_lock+0x39/0x1d0 [ 42.037470] ? lock_downgrade+0x990/0x990 [ 42.041594] ? lock_downgrade+0x990/0x990 [ 42.045712] ? lock_release+0xd70/0xd70 [ 42.049674] ? do_raw_spin_trylock+0x190/0x190 [ 42.054233] ? __local_bh_enable_ip+0x9d/0x160 [ 42.058787] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.063777] ? release_sock+0x1d4/0x2a0 [ 42.067729] ? _raw_spin_unlock_bh+0x30/0x40 [ 42.072110] ? release_sock+0x1d4/0x2a0 [ 42.076066] ? udp_v6_get_port+0x9c/0xc0 [ 42.080105] inet_sendmsg+0x11f/0x5e0 [ 42.083875] ? inet_sendmsg+0x11f/0x5e0 [ 42.087825] ? __might_sleep+0x95/0x190 [ 42.091773] ? inet_recvmsg+0x5f0/0x5f0 [ 42.095720] ? selinux_socket_sendmsg+0x36/0x40 [ 42.100363] ? security_socket_sendmsg+0x89/0xb0 [ 42.105096] ? inet_recvmsg+0x5f0/0x5f0 [ 42.109050] sock_sendmsg+0xca/0x110 [ 42.112738] SYSC_sendto+0x358/0x5a0 [ 42.116426] ? SYSC_connect+0x480/0x480 [ 42.120386] ? mm_fault_error+0x2c0/0x2c0 [ 42.124509] ? ipv6_setsockopt+0xa8/0x150 [ 42.128635] ? __do_page_fault+0xd60/0xd60 [ 42.132853] ? lockdep_sys_exit+0x47/0xf0 [ 42.136973] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 42.141786] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.146774] SyS_sendto+0x40/0x50 [ 42.150201] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.154926] RIP: 0033:0x43fea9 [ 42.158087] RSP: 002b:00007ffd9e0e55f8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 42.165766] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 42.173005] RDX: 0000000000000000 RSI: 0000000020b3efff RDI: 0000000000000003 [ 42.180244] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c [ 42.187483] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 42.194723] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 42.202442] Dumping ftrace buffer: [ 42.206035] (ftrace buffer empty) [ 42.209721] Kernel Offset: disabled [ 42.213327] Rebooting in 86400 seconds..