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-1,10.128.15.206' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.896329] ------------[ cut here ]------------ [ 40.901129] WARNING: CPU: 1 PID: 2981 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 40.909166] Kernel panic - not syncing: panic_on_warn set ... [ 40.909166] [ 40.916500] CPU: 1 PID: 2981 Comm: syzkaller056175 Not tainted 4.14.0-rc4+ #80 [ 40.923830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.933154] Call Trace: [ 40.935727] dump_stack+0x194/0x257 [ 40.939331] ? arch_local_irq_restore+0x53/0x53 [ 40.943984] panic+0x1e4/0x417 [ 40.947146] ? __warn+0x1d9/0x1d9 [ 40.950568] ? show_regs_print_info+0x65/0x65 [ 40.955046] ? kmalloc_slab+0x5d/0x70 [ 40.958817] __warn+0x1c4/0x1d9 [ 40.962068] ? kmalloc_slab+0x5d/0x70 [ 40.965841] report_bug+0x211/0x2d0 [ 40.969447] fixup_bug+0x40/0x90 [ 40.972785] do_trap+0x260/0x390 [ 40.976129] do_error_trap+0x120/0x390 [ 40.979989] ? do_trap+0x390/0x390 [ 40.983500] ? kmalloc_slab+0x5d/0x70 [ 40.987280] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.992099] do_invalid_op+0x1b/0x20 [ 40.995782] invalid_op+0x18/0x20 [ 40.999205] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 41.003587] RSP: 0018:ffff8801d008f4b0 EFLAGS: 00010246 [ 41.008922] RAX: 0000000000000000 RBX: ffff8801d008f748 RCX: 0000000000000007 [ 41.016163] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 41.023404] RBP: ffff8801d008f4b0 R08: ffff8801d187f1c0 R09: ffff8801d008fb10 [ 41.030643] R10: ffff8801ce4341c0 R11: 0000000000000000 R12: ffff8801d008fab0 [ 41.037882] R13: ffff8801d008fb10 R14: 00000000014080c0 R15: ffff8801cf0fe7c0 [ 41.045149] __kmalloc+0x25/0x760 [ 41.048580] ? inet6_dump_ifaddr+0x30/0x30 [ 41.052788] ? ip6_setup_cork+0x1e8/0x15c0 [ 41.057008] ip6_setup_cork+0x1e8/0x15c0 [ 41.061059] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 41.066316] ip6_make_skb+0x282/0x530 [ 41.070089] ? ip_reply_glue_bits+0xb0/0xb0 [ 41.074384] ? ip6_push_pending_frames+0xe0/0xe0 [ 41.079111] ? ip6_dst_hoplimit+0x10d/0x420 [ 41.083402] ? ip6_route_output_flags+0x1f1/0x2b0 [ 41.088225] ? __lock_is_held+0xbc/0x140 [ 41.092268] ? ip6_dst_hoplimit+0xc1/0x420 [ 41.096476] ? ip6_find_1stfragopt+0x240/0x240 [ 41.101055] udpv6_sendmsg+0x2769/0x3380 [ 41.105095] ? ip_reply_glue_bits+0xb0/0xb0 [ 41.109402] ? udpv6_setsockopt+0x80/0x80 [ 41.113520] ? find_held_lock+0x39/0x1d0 [ 41.117566] ? lock_downgrade+0x990/0x990 [ 41.121683] ? lock_downgrade+0x990/0x990 [ 41.125804] ? lock_release+0xd70/0xd70 [ 41.129762] ? do_raw_spin_trylock+0x190/0x190 [ 41.134320] ? __local_bh_enable_ip+0x9d/0x160 [ 41.138875] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.143859] ? release_sock+0x1d4/0x2a0 [ 41.147806] ? _raw_spin_unlock_bh+0x30/0x40 [ 41.152183] ? release_sock+0x1d4/0x2a0 [ 41.156136] ? udp_v6_get_port+0x9c/0xc0 [ 41.160172] inet_sendmsg+0x11f/0x5e0 [ 41.163938] ? inet_sendmsg+0x11f/0x5e0 [ 41.167883] ? __might_sleep+0x95/0x190 [ 41.171826] ? inet_recvmsg+0x5f0/0x5f0 [ 41.175776] ? selinux_socket_sendmsg+0x36/0x40 [ 41.180413] ? security_socket_sendmsg+0x89/0xb0 [ 41.185136] ? inet_recvmsg+0x5f0/0x5f0 [ 41.189092] sock_sendmsg+0xca/0x110 [ 41.192776] SYSC_sendto+0x358/0x5a0 [ 41.196463] ? SYSC_connect+0x480/0x480 [ 41.200418] ? mm_fault_error+0x2c0/0x2c0 [ 41.204540] ? ipv6_setsockopt+0xa8/0x150 [ 41.208665] ? __do_page_fault+0xd60/0xd60 [ 41.212882] ? lockdep_sys_exit+0x47/0xf0 [ 41.216996] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 41.221808] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.226795] SyS_sendto+0x40/0x50 [ 41.230232] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 41.234954] RIP: 0033:0x43fea9 [ 41.238117] RSP: 002b:00007ffe4f841a38 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 41.245798] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 41.253037] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 41.260277] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 41.267518] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 41.274756] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 41.282151] Dumping ftrace buffer: [ 41.285706] (ftrace buffer empty) [ 41.289388] Kernel Offset: disabled [ 41.292994] Rebooting in 86400 seconds..