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-8,10.128.15.225' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.409114] ------------[ cut here ]------------ [ 31.409900] WARNING: CPU: 0 PID: 2981 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 31.411162] Kernel panic - not syncing: panic_on_warn set ... [ 31.411162] [ 31.412153] CPU: 0 PID: 2981 Comm: syzkaller682938 Not tainted 4.14.0-rc5+ #141 [ 31.413196] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.414433] Call Trace: [ 31.414793] dump_stack+0x194/0x257 [ 31.415287] ? arch_local_irq_restore+0x53/0x53 [ 31.415926] panic+0x1e4/0x417 [ 31.416363] ? __warn+0x1d9/0x1d9 [ 31.416832] ? show_regs_print_info+0x65/0x65 [ 31.417464] ? kmalloc_slab+0x5d/0x70 [ 31.417976] __warn+0x1c4/0x1d9 [ 31.418422] ? kmalloc_slab+0x5d/0x70 [ 31.418938] report_bug+0x211/0x2d0 [ 31.419438] fixup_bug+0x40/0x90 [ 31.419895] do_trap+0x260/0x390 [ 31.420361] do_error_trap+0x120/0x390 [ 31.420887] ? do_trap+0x390/0x390 [ 31.421366] ? kmalloc_slab+0x5d/0x70 [ 31.421886] ? ipv6_dev_get_saddr+0x418/0xa20 [ 31.422491] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.423143] do_invalid_op+0x1b/0x20 [ 31.423648] invalid_op+0x18/0x20 [ 31.424114] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 31.424701] RSP: 0018:ffff8801d23e74b0 EFLAGS: 00010246 [ 31.425416] RAX: 0000000000000000 RBX: ffff8801d23e7748 RCX: 0000000000000007 [ 31.426372] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 31.427327] RBP: ffff8801d23e74b0 R08: ffff8801c1b5d8c0 R09: ffff8801d23e7b10 [ 31.428286] R10: ffff8801d23e7678 R11: 0000000000000000 R12: ffff8801d23e7ab0 [ 31.429240] R13: ffff8801d23e7b10 R14: 00000000014080c0 R15: ffff8801d1d0d880 [ 31.436517] __kmalloc+0x25/0x760 [ 31.439941] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 31.444578] ? ip6_setup_cork+0x1e8/0x15c0 [ 31.448778] ? mark_held_locks+0xaf/0x100 [ 31.452906] ip6_setup_cork+0x1e8/0x15c0 [ 31.456950] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 31.462198] ? ip6_pol_route_output+0x4c/0x60 [ 31.466659] ? ip6_pol_route_input+0x70/0x70 [ 31.471043] ip6_make_skb+0x282/0x530 [ 31.474817] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.479111] ? ip6_push_pending_frames+0xe0/0xe0 [ 31.483834] ? ip6_dst_hoplimit+0x26c/0x420 [ 31.488126] ? lock_downgrade+0x990/0x990 [ 31.492249] ? __lock_is_held+0xb6/0x140 [ 31.496288] ? ip6_dst_hoplimit+0xc1/0x420 [ 31.500490] ? ip6_find_1stfragopt+0x240/0x240 [ 31.505048] udpv6_sendmsg+0x2769/0x3380 [ 31.509083] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.513382] ? udpv6_setsockopt+0x80/0x80 [ 31.517499] ? reacquire_held_locks+0x1fd/0x3d0 [ 31.522137] ? reacquire_held_locks+0x1fd/0x3d0 [ 31.526777] ? find_held_lock+0x35/0x1d0 [ 31.530814] ? release_sock+0x1d4/0x2a0 [ 31.534756] ? lock_downgrade+0x990/0x990 [ 31.538872] ? lock_downgrade+0x990/0x990 [ 31.542990] ? do_raw_spin_trylock+0x190/0x190 [ 31.547546] ? __local_bh_enable_ip+0x9d/0x160 [ 31.552100] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.557081] ? release_sock+0x1d4/0x2a0 [ 31.561028] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.565403] ? release_sock+0x1d4/0x2a0 [ 31.569354] ? udp_v6_get_port+0x9c/0xc0 [ 31.573390] inet_sendmsg+0x11f/0x5e0 [ 31.577158] ? inet_sendmsg+0x11f/0x5e0 [ 31.581102] ? __might_sleep+0x95/0x190 [ 31.585046] ? inet_recvmsg+0x5f0/0x5f0 [ 31.588995] ? selinux_socket_sendmsg+0x36/0x40 [ 31.593632] ? security_socket_sendmsg+0x89/0xb0 [ 31.598353] ? inet_recvmsg+0x5f0/0x5f0 [ 31.602298] sock_sendmsg+0xca/0x110 [ 31.605984] SYSC_sendto+0x352/0x5a0 [ 31.609669] ? SYSC_connect+0x470/0x470 [ 31.613632] ? mm_fault_error+0x2c0/0x2c0 [ 31.617752] ? ipv6_setsockopt+0xa8/0x150 [ 31.621875] ? __do_page_fault+0xd60/0xd60 [ 31.626085] ? SyS_recv+0x40/0x40 [ 31.629506] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 31.634318] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.639307] SyS_sendto+0x40/0x50 [ 31.642733] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.647456] RIP: 0033:0x43ff99 [ 31.650614] RSP: 002b:00007ffea68b2218 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 31.658289] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043ff99 [ 31.665527] RDX: 0000000000000000 RSI: 0000000020fd1000 RDI: 0000000000000003 [ 31.672765] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c [ 31.680004] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 31.687241] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.694662] Dumping ftrace buffer: [ 31.698226] (ftrace buffer empty) [ 31.701908] Kernel Offset: disabled [ 31.705509] Rebooting in 86400 seconds..