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-1,10.128.15.207' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.073846] ------------[ cut here ]------------ [ 43.078639] WARNING: CPU: 1 PID: 2984 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70 [ 43.086740] Kernel panic - not syncing: panic_on_warn set ... [ 43.086740] [ 43.094079] CPU: 1 PID: 2984 Comm: syzkaller992344 Not tainted 4.14.0-rc2-next-20170929+ #32 [ 43.102620] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.111947] Call Trace: [ 43.114509] dump_stack+0x194/0x257 [ 43.118110] ? arch_local_irq_restore+0x53/0x53 [ 43.122761] panic+0x1e4/0x41c [ 43.125927] ? refcount_error_report+0x214/0x214 [ 43.130654] ? show_regs_print_info+0x65/0x65 [ 43.135133] ? kmalloc_slab+0x5d/0x70 [ 43.138902] __warn+0x1c4/0x1e0 [ 43.142150] ? kmalloc_slab+0x5d/0x70 [ 43.145925] report_bug+0x211/0x2d0 [ 43.149536] fixup_bug+0x40/0x90 [ 43.152875] do_trap+0x260/0x390 [ 43.156220] do_error_trap+0x120/0x390 [ 43.160083] ? do_trap+0x390/0x390 [ 43.163597] ? kmalloc_slab+0x5d/0x70 [ 43.167367] ? lock_release+0xd70/0xd70 [ 43.171320] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.176137] do_invalid_op+0x1b/0x20 [ 43.179819] invalid_op+0x18/0x20 [ 43.183240] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 43.187614] RSP: 0018:ffff8801ce16f4b0 EFLAGS: 00010246 [ 43.192954] RAX: 0000000000000000 RBX: ffff8801ce16f748 RCX: 0000000000000007 [ 43.200192] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 43.207431] RBP: ffff8801ce16f4b0 R08: ffff8801d5598e00 R09: ffff8801ce16fb10 [ 43.214670] R10: ffff8801ce7a8240 R11: 0000000000000000 R12: ffff8801ce16fab0 [ 43.221907] R13: ffff8801ce16fb10 R14: 00000000014080c0 R15: ffff8801d559a7c0 [ 43.229170] __kmalloc+0x25/0x760 [ 43.232603] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 43.237241] ? ip6_setup_cork+0x1e8/0x15c0 [ 43.241450] ip6_setup_cork+0x1e8/0x15c0 [ 43.245488] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 43.250747] ip6_make_skb+0x282/0x530 [ 43.254519] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.258815] ? ip6_push_pending_frames+0xe0/0xe0 [ 43.263541] ? ip6_dst_hoplimit+0x10d/0x420 [ 43.267831] ? ip6_route_output_flags+0x1f1/0x2b0 [ 43.272657] ? __lock_is_held+0xbc/0x140 [ 43.276701] ? ip6_dst_hoplimit+0xc1/0x420 [ 43.280905] ? ip6_find_1stfragopt+0x240/0x240 [ 43.285464] udpv6_sendmsg+0x2769/0x3380 [ 43.289498] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.293801] ? udpv6_setsockopt+0x80/0x80 [ 43.297916] ? find_held_lock+0x39/0x1d0 [ 43.301961] ? lock_downgrade+0x990/0x990 [ 43.306079] ? lock_downgrade+0x990/0x990 [ 43.310199] ? lock_release+0xd70/0xd70 [ 43.314155] ? do_raw_spin_trylock+0x190/0x190 [ 43.318712] ? __local_bh_enable_ip+0x9d/0x160 [ 43.323265] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.328252] ? release_sock+0x1d4/0x2a0 [ 43.332199] ? _raw_spin_unlock_bh+0x30/0x40 [ 43.336577] ? release_sock+0x1d4/0x2a0 [ 43.340532] ? udp_v6_get_port+0x9c/0xc0 [ 43.344571] inet_sendmsg+0x11f/0x5e0 [ 43.348341] ? inet_sendmsg+0x11f/0x5e0 [ 43.352286] ? __might_sleep+0x95/0x190 [ 43.356232] ? inet_recvmsg+0x5f0/0x5f0 [ 43.360178] ? selinux_socket_sendmsg+0x36/0x40 [ 43.364813] ? security_socket_sendmsg+0x89/0xb0 [ 43.369540] ? inet_recvmsg+0x5f0/0x5f0 [ 43.373486] sock_sendmsg+0xca/0x110 [ 43.377172] SYSC_sendto+0x358/0x5a0 [ 43.380954] ? SYSC_connect+0x480/0x480 [ 43.384907] ? mm_fault_error+0x2c0/0x2c0 [ 43.389029] ? ipv6_setsockopt+0xa8/0x150 [ 43.393156] ? __do_page_fault+0xd60/0xd60 [ 43.397372] ? lockdep_sys_exit+0x47/0xf0 [ 43.401489] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 43.406303] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.411291] SyS_sendto+0x40/0x50 [ 43.414720] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 43.419443] RIP: 0033:0x43fea9 [ 43.422600] RSP: 002b:00007ffd97053528 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 43.430281] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 43.437519] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 43.444759] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 43.451997] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 43.459411] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 43.466793] Dumping ftrace buffer: [ 43.470343] (ftrace buffer empty) [ 43.474024] Kernel Offset: disabled [ 43.477629] Rebooting in 86400 seconds..