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-6,10.128.15.206' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.261669] ------------[ cut here ]------------ [ 42.266489] WARNING: CPU: 0 PID: 2985 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70 [ 42.274686] Kernel panic - not syncing: panic_on_warn set ... [ 42.274686] [ 42.282028] CPU: 0 PID: 2985 Comm: syzkaller109599 Not tainted 4.14.0-rc2-next-20170929+ #32 [ 42.290586] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.299913] Call Trace: [ 42.302481] dump_stack+0x194/0x257 [ 42.306084] ? arch_local_irq_restore+0x53/0x53 [ 42.310745] panic+0x1e4/0x41c [ 42.313913] ? refcount_error_report+0x214/0x214 [ 42.318643] ? show_regs_print_info+0x65/0x65 [ 42.323128] ? kmalloc_slab+0x5d/0x70 [ 42.326902] __warn+0x1c4/0x1e0 [ 42.330155] ? kmalloc_slab+0x5d/0x70 [ 42.334049] report_bug+0x211/0x2d0 [ 42.337676] fixup_bug+0x40/0x90 [ 42.341026] do_trap+0x260/0x390 [ 42.344376] do_error_trap+0x120/0x390 [ 42.348242] ? do_trap+0x390/0x390 [ 42.351757] ? kmalloc_slab+0x5d/0x70 [ 42.355534] ? lock_release+0xd70/0xd70 [ 42.359488] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.364310] do_invalid_op+0x1b/0x20 [ 42.367995] invalid_op+0x18/0x20 [ 42.371417] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 42.375793] RSP: 0018:ffff8801cdc5f4b0 EFLAGS: 00010246 [ 42.381127] RAX: 0000000000000000 RBX: ffff8801cdc5f748 RCX: 0000000000000007 [ 42.388367] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 42.395606] RBP: ffff8801cdc5f4b0 R08: ffff8801d104e380 R09: ffff8801cdc5fb10 [ 42.402846] R10: ffff8801ce134380 R11: 0000000000000000 R12: ffff8801cdc5fab0 [ 42.410084] R13: ffff8801cdc5fb10 R14: 00000000014080c0 R15: ffff8801ce3a27c0 [ 42.417346] __kmalloc+0x25/0x760 [ 42.420775] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 42.425412] ? ip6_setup_cork+0x1e8/0x15c0 [ 42.429621] ip6_setup_cork+0x1e8/0x15c0 [ 42.433659] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 42.438916] ip6_make_skb+0x282/0x530 [ 42.442698] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.446990] ? ip6_push_pending_frames+0xe0/0xe0 [ 42.451715] ? ip6_dst_hoplimit+0x10d/0x420 [ 42.456007] ? ip6_route_output_flags+0x1f1/0x2b0 [ 42.460830] ? __lock_is_held+0xbc/0x140 [ 42.464874] ? ip6_dst_hoplimit+0xc1/0x420 [ 42.469080] ? ip6_find_1stfragopt+0x240/0x240 [ 42.473643] udpv6_sendmsg+0x2769/0x3380 [ 42.477676] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.481981] ? udpv6_setsockopt+0x80/0x80 [ 42.486100] ? find_held_lock+0x39/0x1d0 [ 42.490143] ? lock_downgrade+0x990/0x990 [ 42.494269] ? lock_downgrade+0x990/0x990 [ 42.498388] ? lock_release+0xd70/0xd70 [ 42.502345] ? do_raw_spin_trylock+0x190/0x190 [ 42.506908] ? __local_bh_enable_ip+0x9d/0x160 [ 42.511471] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.516487] ? release_sock+0x1d4/0x2a0 [ 42.520468] ? _raw_spin_unlock_bh+0x30/0x40 [ 42.524847] ? release_sock+0x1d4/0x2a0 [ 42.528800] ? udp_v6_get_port+0x9c/0xc0 [ 42.532841] inet_sendmsg+0x11f/0x5e0 [ 42.536609] ? inet_sendmsg+0x11f/0x5e0 [ 42.540552] ? __might_sleep+0x95/0x190 [ 42.544497] ? inet_recvmsg+0x5f0/0x5f0 [ 42.548446] ? selinux_socket_sendmsg+0x36/0x40 [ 42.553085] ? security_socket_sendmsg+0x89/0xb0 [ 42.557814] ? inet_recvmsg+0x5f0/0x5f0 [ 42.561762] sock_sendmsg+0xca/0x110 [ 42.565449] SYSC_sendto+0x358/0x5a0 [ 42.569140] ? SYSC_connect+0x480/0x480 [ 42.573097] ? mm_fault_error+0x2c0/0x2c0 [ 42.577222] ? ipv6_setsockopt+0xa8/0x150 [ 42.581351] ? __do_page_fault+0xd60/0xd60 [ 42.585569] ? lockdep_sys_exit+0x47/0xf0 [ 42.589697] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 42.594513] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.599502] SyS_sendto+0x40/0x50 [ 42.602933] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.607658] RIP: 0033:0x43fea9 [ 42.610819] RSP: 002b:00007ffded39bb68 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 42.618502] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 42.625745] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 42.632985] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 42.640227] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 42.647466] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 42.654895] Dumping ftrace buffer: [ 42.658464] (ftrace buffer empty) [ 42.662149] Kernel Offset: disabled [ 42.665761] Rebooting in 86400 seconds..