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-1,10.128.0.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.386612] ------------[ cut here ]------------ [ 52.391413] WARNING: CPU: 1 PID: 2983 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 52.399410] Kernel panic - not syncing: panic_on_warn set ... [ 52.399410] [ 52.406752] CPU: 1 PID: 2983 Comm: syzkaller649905 Not tainted 4.14.0-rc4+ #130 [ 52.414172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.423495] Call Trace: [ 52.426054] dump_stack+0x194/0x257 [ 52.429653] ? arch_local_irq_restore+0x53/0x53 [ 52.434305] panic+0x1e4/0x417 [ 52.437467] ? __warn+0x1d9/0x1d9 [ 52.440892] ? show_regs_print_info+0x65/0x65 [ 52.445374] ? kmalloc_slab+0x5d/0x70 [ 52.449142] __warn+0x1c4/0x1d9 [ 52.452390] ? kmalloc_slab+0x5d/0x70 [ 52.456163] report_bug+0x211/0x2d0 [ 52.459765] fixup_bug+0x40/0x90 [ 52.463103] do_trap+0x260/0x390 [ 52.466444] do_error_trap+0x120/0x390 [ 52.470306] ? do_trap+0x390/0x390 [ 52.473816] ? kmalloc_slab+0x5d/0x70 [ 52.477589] ? lock_release+0xd70/0xd70 [ 52.481540] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.486359] do_invalid_op+0x1b/0x20 [ 52.490042] invalid_op+0x18/0x20 [ 52.493462] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 52.497838] RSP: 0018:ffff8801ce71f4b0 EFLAGS: 00010246 [ 52.503173] RAX: 0000000000000000 RBX: ffff8801ce71f748 RCX: 0000000000000007 [ 52.510415] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 52.517654] RBP: ffff8801ce71f4b0 R08: ffff8801d16841c0 R09: ffff8801ce71fb10 [ 52.524892] R10: ffff8801ce6de200 R11: 0000000000000000 R12: ffff8801ce71fab0 [ 52.532133] R13: ffff8801ce71fb10 R14: 00000000014080c0 R15: ffff8801ce83e7c0 [ 52.539395] __kmalloc+0x25/0x760 [ 52.542822] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 52.547461] ? ip6_setup_cork+0x1e8/0x15c0 [ 52.551672] ip6_setup_cork+0x1e8/0x15c0 [ 52.555711] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 52.560969] ip6_make_skb+0x282/0x530 [ 52.564743] ? ip_reply_glue_bits+0xb0/0xb0 [ 52.569037] ? ip6_push_pending_frames+0xe0/0xe0 [ 52.573763] ? ip6_dst_hoplimit+0x10d/0x420 [ 52.578055] ? ip6_route_output_flags+0x1f1/0x2b0 [ 52.582877] ? __lock_is_held+0xbc/0x140 [ 52.586919] ? ip6_dst_hoplimit+0xc1/0x420 [ 52.591124] ? ip6_find_1stfragopt+0x240/0x240 [ 52.595686] udpv6_sendmsg+0x2769/0x3380 [ 52.599719] ? ip_reply_glue_bits+0xb0/0xb0 [ 52.604025] ? udpv6_setsockopt+0x80/0x80 [ 52.608143] ? find_held_lock+0x39/0x1d0 [ 52.612187] ? lock_downgrade+0x990/0x990 [ 52.616305] ? lock_downgrade+0x990/0x990 [ 52.620424] ? lock_release+0xd70/0xd70 [ 52.624400] ? do_raw_spin_trylock+0x190/0x190 [ 52.628958] ? __local_bh_enable_ip+0x9d/0x160 [ 52.633513] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 52.638500] ? release_sock+0x1d4/0x2a0 [ 52.642453] ? _raw_spin_unlock_bh+0x30/0x40 [ 52.646836] ? release_sock+0x1d4/0x2a0 [ 52.650790] ? udp_v6_get_port+0x9c/0xc0 [ 52.654830] inet_sendmsg+0x11f/0x5e0 [ 52.658598] ? inet_sendmsg+0x11f/0x5e0 [ 52.662542] ? __might_sleep+0x95/0x190 [ 52.666486] ? inet_recvmsg+0x5f0/0x5f0 [ 52.670432] ? selinux_socket_sendmsg+0x36/0x40 [ 52.675070] ? security_socket_sendmsg+0x89/0xb0 [ 52.679793] ? inet_recvmsg+0x5f0/0x5f0 [ 52.683737] sock_sendmsg+0xca/0x110 [ 52.687424] SYSC_sendto+0x358/0x5a0 [ 52.691115] ? SYSC_connect+0x480/0x480 [ 52.695070] ? mm_fault_error+0x2c0/0x2c0 [ 52.699191] ? ipv6_setsockopt+0xa8/0x150 [ 52.703318] ? __do_page_fault+0xd60/0xd60 [ 52.707534] ? lockdep_sys_exit+0x47/0xf0 [ 52.711649] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 52.716462] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 52.721450] SyS_sendto+0x40/0x50 [ 52.724876] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 52.729600] RIP: 0033:0x43fea9 [ 52.732760] RSP: 002b:00007fff173bfc18 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 52.740438] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 52.747675] RDX: 0000000000000000 RSI: 0000000020b3efff RDI: 0000000000000003 [ 52.754914] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 52.762153] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 52.769394] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 52.777113] Dumping ftrace buffer: [ 52.780667] (ftrace buffer empty) [ 52.784351] Kernel Offset: disabled [ 52.787955] Rebooting in 86400 seconds..