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-5,10.128.0.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.004160] ------------[ cut here ]------------ [ 35.008959] WARNING: CPU: 1 PID: 2981 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70 [ 35.017145] Kernel panic - not syncing: panic_on_warn set ... [ 35.017145] [ 35.024497] CPU: 1 PID: 2981 Comm: syzkaller984211 Not tainted 4.14.0-rc4-next-20171009+ #33 [ 35.033308] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.042634] Call Trace: [ 35.046078] dump_stack+0x194/0x257 [ 35.049683] ? arch_local_irq_restore+0x53/0x53 [ 35.054333] panic+0x1e4/0x41c [ 35.057498] ? refcount_error_report+0x214/0x214 [ 35.062225] ? show_regs_print_info+0x65/0x65 [ 35.066708] ? kmalloc_slab+0x5d/0x70 [ 35.070478] __warn+0x1c4/0x1e0 [ 35.073729] ? kmalloc_slab+0x5d/0x70 [ 35.077592] report_bug+0x211/0x2d0 [ 35.081195] fixup_bug+0x40/0x90 [ 35.084532] do_trap+0x260/0x390 [ 35.087878] do_error_trap+0x120/0x390 [ 35.091828] ? do_trap+0x390/0x390 [ 35.095338] ? kmalloc_slab+0x5d/0x70 [ 35.099119] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.103939] do_invalid_op+0x1b/0x20 [ 35.107624] invalid_op+0x18/0x20 [ 35.111046] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 35.115423] RSP: 0018:ffff8801ce0cf4b0 EFLAGS: 00010246 [ 35.120760] RAX: 0000000000000000 RBX: ffff8801ce0cf748 RCX: 0000000000000007 [ 35.128001] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 35.135249] RBP: ffff8801ce0cf4b0 R08: ffff8801d7b001c0 R09: ffff8801ce0cfb10 [ 35.142489] R10: ffff8801cf04c480 R11: 0000000000000000 R12: ffff8801ce0cfab0 [ 35.149728] R13: ffff8801ce0cfb10 R14: 00000000014080c0 R15: ffff8801ce6587c0 [ 35.156995] __kmalloc+0x25/0x760 [ 35.160429] ? inet6_dump_ifaddr+0x30/0x30 [ 35.164647] ? ip6_setup_cork+0x1e8/0x15c0 [ 35.168867] ip6_setup_cork+0x1e8/0x15c0 [ 35.172914] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 35.178173] ip6_make_skb+0x282/0x530 [ 35.181949] ? ip_reply_glue_bits+0xb0/0xb0 [ 35.186254] ? ip6_push_pending_frames+0xe0/0xe0 [ 35.190982] ? ip6_dst_hoplimit+0x10d/0x420 [ 35.195276] ? ip6_route_output_flags+0x1f1/0x2b0 [ 35.200114] ? __lock_is_held+0xbc/0x140 [ 35.204180] ? ip6_dst_hoplimit+0xc1/0x420 [ 35.208397] ? ip6_find_1stfragopt+0x240/0x240 [ 35.212963] udpv6_sendmsg+0x2769/0x3380 [ 35.217008] ? ip_reply_glue_bits+0xb0/0xb0 [ 35.221313] ? udpv6_setsockopt+0x80/0x80 [ 35.225432] ? find_held_lock+0x39/0x1d0 [ 35.229474] ? lock_downgrade+0x990/0x990 [ 35.233599] ? lock_downgrade+0x990/0x990 [ 35.237718] ? lock_release+0xd70/0xd70 [ 35.241674] ? do_raw_spin_trylock+0x190/0x190 [ 35.246240] ? __local_bh_enable_ip+0x9d/0x160 [ 35.250794] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.255782] ? release_sock+0x1d4/0x2a0 [ 35.259732] ? _raw_spin_unlock_bh+0x30/0x40 [ 35.264118] ? release_sock+0x1d4/0x2a0 [ 35.268079] ? udp_v6_get_port+0x9c/0xc0 [ 35.272116] inet_sendmsg+0x11f/0x5e0 [ 35.275894] ? inet_sendmsg+0x11f/0x5e0 [ 35.279842] ? __might_sleep+0x95/0x190 [ 35.283787] ? inet_recvmsg+0x5f0/0x5f0 [ 35.287736] ? selinux_socket_sendmsg+0x36/0x40 [ 35.292378] ? security_socket_sendmsg+0x89/0xb0 [ 35.297115] ? inet_recvmsg+0x5f0/0x5f0 [ 35.301071] sock_sendmsg+0xca/0x110 [ 35.304760] SYSC_sendto+0x358/0x5a0 [ 35.308450] ? SYSC_connect+0x480/0x480 [ 35.312406] ? mm_fault_error+0x2c0/0x2c0 [ 35.316532] ? ipv6_setsockopt+0xa8/0x150 [ 35.320671] ? __do_page_fault+0xd60/0xd60 [ 35.324891] ? lockdep_sys_exit+0x47/0xf0 [ 35.329011] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 35.333828] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.338827] SyS_sendto+0x40/0x50 [ 35.342258] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 35.346987] RIP: 0033:0x43fea9 [ 35.350152] RSP: 002b:00007ffdd1d84d48 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 35.357840] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 35.365080] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 35.372324] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c [ 35.379564] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 35.386807] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.394279] Dumping ftrace buffer: [ 35.397833] (ftrace buffer empty) [ 35.401514] Kernel Offset: disabled [ 35.405119] Rebooting in 86400 seconds..