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-1,10.128.15.199' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.555173] ------------[ cut here ]------------ [ 51.559969] WARNING: CPU: 1 PID: 2981 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 51.568048] Kernel panic - not syncing: panic_on_warn set ... [ 51.568048] [ 51.575392] CPU: 1 PID: 2981 Comm: syzkaller167469 Not tainted 4.14.0-rc4+ #80 [ 51.582729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.592062] Call Trace: [ 51.594627] dump_stack+0x194/0x257 [ 51.598231] ? arch_local_irq_restore+0x53/0x53 [ 51.602884] panic+0x1e4/0x417 [ 51.606049] ? __warn+0x1d9/0x1d9 [ 51.609473] ? show_regs_print_info+0x65/0x65 [ 51.613954] ? kmalloc_slab+0x5d/0x70 [ 51.617725] __warn+0x1c4/0x1d9 [ 51.620973] ? kmalloc_slab+0x5d/0x70 [ 51.624746] report_bug+0x211/0x2d0 [ 51.628355] fixup_bug+0x40/0x90 [ 51.631694] do_trap+0x260/0x390 [ 51.635038] do_error_trap+0x120/0x390 [ 51.638898] ? do_trap+0x390/0x390 [ 51.642408] ? kmalloc_slab+0x5d/0x70 [ 51.646189] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.651017] do_invalid_op+0x1b/0x20 [ 51.654703] invalid_op+0x18/0x20 [ 51.658124] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 51.662500] RSP: 0018:ffff8801ce5e74b0 EFLAGS: 00010246 [ 51.667843] RAX: 0000000000000000 RBX: ffff8801ce5e7748 RCX: 0000000000000007 [ 51.675086] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 51.682326] RBP: ffff8801ce5e74b0 R08: ffff8801d0b971c0 R09: ffff8801ce5e7b10 [ 51.689569] R10: ffff8801cee66000 R11: 0000000000000000 R12: ffff8801ce5e7ab0 [ 51.696814] R13: ffff8801ce5e7b10 R14: 00000000014080c0 R15: ffff8801cee697c0 [ 51.704083] __kmalloc+0x25/0x760 [ 51.707521] ? inet6_dump_ifaddr+0x30/0x30 [ 51.711726] ? ip6_setup_cork+0x1e8/0x15c0 [ 51.715937] ip6_setup_cork+0x1e8/0x15c0 [ 51.719977] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 51.725236] ip6_make_skb+0x282/0x530 [ 51.729010] ? ip_reply_glue_bits+0xb0/0xb0 [ 51.733305] ? ip6_push_pending_frames+0xe0/0xe0 [ 51.738031] ? ip6_dst_hoplimit+0x10d/0x420 [ 51.742326] ? ip6_route_output_flags+0x1f1/0x2b0 [ 51.747155] ? __lock_is_held+0xbc/0x140 [ 51.751202] ? ip6_dst_hoplimit+0xc1/0x420 [ 51.755407] ? ip6_find_1stfragopt+0x240/0x240 [ 51.759968] udpv6_sendmsg+0x2769/0x3380 [ 51.764006] ? ip_reply_glue_bits+0xb0/0xb0 [ 51.768312] ? udpv6_setsockopt+0x80/0x80 [ 51.772430] ? find_held_lock+0x39/0x1d0 [ 51.776563] ? lock_downgrade+0x990/0x990 [ 51.780682] ? lock_downgrade+0x990/0x990 [ 51.784804] ? lock_release+0xd70/0xd70 [ 51.788761] ? do_raw_spin_trylock+0x190/0x190 [ 51.793321] ? __local_bh_enable_ip+0x9d/0x160 [ 51.797878] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 51.802865] ? release_sock+0x1d4/0x2a0 [ 51.806817] ? _raw_spin_unlock_bh+0x30/0x40 [ 51.811195] ? release_sock+0x1d4/0x2a0 [ 51.815150] ? udp_v6_get_port+0x9c/0xc0 [ 51.819192] inet_sendmsg+0x11f/0x5e0 [ 51.822968] ? inet_sendmsg+0x11f/0x5e0 [ 51.826917] ? __might_sleep+0x95/0x190 [ 51.830865] ? inet_recvmsg+0x5f0/0x5f0 [ 51.834816] ? selinux_socket_sendmsg+0x36/0x40 [ 51.839459] ? security_socket_sendmsg+0x89/0xb0 [ 51.844185] ? inet_recvmsg+0x5f0/0x5f0 [ 51.848137] sock_sendmsg+0xca/0x110 [ 51.851826] SYSC_sendto+0x358/0x5a0 [ 51.855516] ? SYSC_connect+0x480/0x480 [ 51.859473] ? mm_fault_error+0x2c0/0x2c0 [ 51.863601] ? ipv6_setsockopt+0xa8/0x150 [ 51.867731] ? __do_page_fault+0xd60/0xd60 [ 51.871954] ? lockdep_sys_exit+0x47/0xf0 [ 51.876075] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 51.880893] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 51.885888] SyS_sendto+0x40/0x50 [ 51.889318] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 51.894044] RIP: 0033:0x43fea9 [ 51.897203] RSP: 002b:00007ffc5224d908 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 51.904895] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 51.912138] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 51.919379] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 51.926621] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 51.933862] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 51.941256] Dumping ftrace buffer: [ 51.944817] (ftrace buffer empty) [ 51.948501] Kernel Offset: disabled [ 51.952105] Rebooting in 86400 seconds..