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-6,10.128.0.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.352343] ------------[ cut here ]------------ [ 43.357280] WARNING: CPU: 1 PID: 2987 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 43.365370] Kernel panic - not syncing: panic_on_warn set ... [ 43.365370] [ 43.372710] CPU: 1 PID: 2987 Comm: syzkaller500330 Not tainted 4.14.0-rc4+ #80 [ 43.380037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.389368] Call Trace: [ 43.391944] dump_stack+0x194/0x257 [ 43.395545] ? arch_local_irq_restore+0x53/0x53 [ 43.400207] panic+0x1e4/0x417 [ 43.403374] ? __warn+0x1d9/0x1d9 [ 43.406797] ? show_regs_print_info+0x65/0x65 [ 43.411279] ? kmalloc_slab+0x5d/0x70 [ 43.415047] __warn+0x1c4/0x1d9 [ 43.418298] ? kmalloc_slab+0x5d/0x70 [ 43.422073] report_bug+0x211/0x2d0 [ 43.425681] fixup_bug+0x40/0x90 [ 43.429020] do_trap+0x260/0x390 [ 43.432365] do_error_trap+0x120/0x390 [ 43.436229] ? do_trap+0x390/0x390 [ 43.439740] ? kmalloc_slab+0x5d/0x70 [ 43.443523] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.448340] do_invalid_op+0x1b/0x20 [ 43.452026] invalid_op+0x18/0x20 [ 43.455447] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 43.459821] RSP: 0018:ffff8801ce1af4b0 EFLAGS: 00010246 [ 43.465156] RAX: 0000000000000000 RBX: ffff8801ce1af748 RCX: 0000000000000007 [ 43.472394] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 43.479631] RBP: ffff8801ce1af4b0 R08: ffff8801ce2201c0 R09: ffff8801ce1afb10 [ 43.486870] R10: ffff8801ce6544c0 R11: 0000000000000000 R12: ffff8801ce1afab0 [ 43.494110] R13: ffff8801ce1afb10 R14: 00000000014080c0 R15: ffff8801ce0bc7c0 [ 43.501372] __kmalloc+0x25/0x760 [ 43.504802] ? inet6_dump_ifaddr+0x30/0x30 [ 43.509008] ? ip6_setup_cork+0x1e8/0x15c0 [ 43.513219] ip6_setup_cork+0x1e8/0x15c0 [ 43.517257] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 43.522513] ip6_make_skb+0x282/0x530 [ 43.526285] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.530578] ? ip6_push_pending_frames+0xe0/0xe0 [ 43.535306] ? ip6_dst_hoplimit+0x10d/0x420 [ 43.539616] ? ip6_route_output_flags+0x1f1/0x2b0 [ 43.544441] ? __lock_is_held+0xbc/0x140 [ 43.548484] ? ip6_dst_hoplimit+0xc1/0x420 [ 43.552691] ? ip6_find_1stfragopt+0x240/0x240 [ 43.557250] udpv6_sendmsg+0x2769/0x3380 [ 43.561284] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.565592] ? udpv6_setsockopt+0x80/0x80 [ 43.569708] ? find_held_lock+0x39/0x1d0 [ 43.573751] ? lock_downgrade+0x990/0x990 [ 43.577870] ? lock_downgrade+0x990/0x990 [ 43.581988] ? lock_release+0xd70/0xd70 [ 43.585944] ? do_raw_spin_trylock+0x190/0x190 [ 43.590500] ? __local_bh_enable_ip+0x9d/0x160 [ 43.595052] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.600037] ? release_sock+0x1d4/0x2a0 [ 43.603983] ? _raw_spin_unlock_bh+0x30/0x40 [ 43.608360] ? release_sock+0x1d4/0x2a0 [ 43.612311] ? udp_v6_get_port+0x9c/0xc0 [ 43.616351] inet_sendmsg+0x11f/0x5e0 [ 43.620118] ? inet_sendmsg+0x11f/0x5e0 [ 43.624061] ? __might_sleep+0x95/0x190 [ 43.628005] ? inet_recvmsg+0x5f0/0x5f0 [ 43.631954] ? selinux_socket_sendmsg+0x36/0x40 [ 43.636596] ? security_socket_sendmsg+0x89/0xb0 [ 43.641322] ? inet_recvmsg+0x5f0/0x5f0 [ 43.645269] sock_sendmsg+0xca/0x110 [ 43.648956] SYSC_sendto+0x358/0x5a0 [ 43.652644] ? SYSC_connect+0x480/0x480 [ 43.656600] ? mm_fault_error+0x2c0/0x2c0 [ 43.660720] ? ipv6_setsockopt+0xa8/0x150 [ 43.664847] ? __do_page_fault+0xd60/0xd60 [ 43.669065] ? lockdep_sys_exit+0x47/0xf0 [ 43.673182] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 43.677994] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.682982] SyS_sendto+0x40/0x50 [ 43.686408] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 43.691132] RIP: 0033:0x43fea9 [ 43.694289] RSP: 002b:00007fff891135b8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 43.701967] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 43.709204] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 43.716442] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 43.723683] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 43.730923] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 43.738349] Dumping ftrace buffer: [ 43.741903] (ftrace buffer empty) [ 43.745588] Kernel Offset: disabled [ 43.749191] Rebooting in 86400 seconds..