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-6,10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.886625] ------------[ cut here ]------------ [ 42.891471] WARNING: CPU: 1 PID: 2988 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 42.899621] Kernel panic - not syncing: panic_on_warn set ... [ 42.899621] [ 42.906962] CPU: 1 PID: 2988 Comm: syzkaller978448 Not tainted 4.14.0-rc4+ #131 [ 42.914378] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.923706] Call Trace: [ 42.926273] dump_stack+0x194/0x257 [ 42.929877] ? arch_local_irq_restore+0x53/0x53 [ 42.934532] panic+0x1e4/0x417 [ 42.937698] ? __warn+0x1d9/0x1d9 [ 42.941120] ? show_regs_print_info+0x65/0x65 [ 42.945600] ? kmalloc_slab+0x5d/0x70 [ 42.949370] __warn+0x1c4/0x1d9 [ 42.952623] ? kmalloc_slab+0x5d/0x70 [ 42.956424] report_bug+0x211/0x2d0 [ 42.960030] fixup_bug+0x40/0x90 [ 42.963369] do_trap+0x260/0x390 [ 42.966712] do_error_trap+0x120/0x390 [ 42.970579] ? do_trap+0x390/0x390 [ 42.974092] ? kmalloc_slab+0x5d/0x70 [ 42.977875] ? lock_release+0xd70/0xd70 [ 42.981830] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.986649] do_invalid_op+0x1b/0x20 [ 42.990335] invalid_op+0x18/0x20 [ 42.993760] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 42.998159] RSP: 0018:ffff8801ce7ef4b0 EFLAGS: 00010246 [ 43.003495] RAX: 0000000000000000 RBX: ffff8801ce7ef748 RCX: 0000000000000007 [ 43.010738] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 43.017978] RBP: ffff8801ce7ef4b0 R08: ffff8801cd4c7700 R09: ffff8801ce7efb10 [ 43.025221] R10: ffff8801ce528200 R11: 0000000000000000 R12: ffff8801ce7efab0 [ 43.032465] R13: ffff8801ce7efb10 R14: 00000000014080c0 R15: ffff8801ce0317c0 [ 43.039732] __kmalloc+0x25/0x760 [ 43.043175] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 43.047815] ? ip6_setup_cork+0x1e8/0x15c0 [ 43.052028] ip6_setup_cork+0x1e8/0x15c0 [ 43.056068] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 43.061331] ip6_make_skb+0x282/0x530 [ 43.065130] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.069424] ? ip6_push_pending_frames+0xe0/0xe0 [ 43.074156] ? ip6_dst_hoplimit+0x10d/0x420 [ 43.078455] ? ip6_route_output_flags+0x1f1/0x2b0 [ 43.083280] ? __lock_is_held+0xbc/0x140 [ 43.087328] ? ip6_dst_hoplimit+0xc1/0x420 [ 43.091534] ? ip6_find_1stfragopt+0x240/0x240 [ 43.096099] udpv6_sendmsg+0x2769/0x3380 [ 43.100136] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.104443] ? udpv6_setsockopt+0x80/0x80 [ 43.108565] ? find_held_lock+0x39/0x1d0 [ 43.112609] ? lock_downgrade+0x990/0x990 [ 43.116729] ? lock_downgrade+0x990/0x990 [ 43.120849] ? lock_release+0xd70/0xd70 [ 43.124807] ? do_raw_spin_trylock+0x190/0x190 [ 43.129367] ? __local_bh_enable_ip+0x9d/0x160 [ 43.133922] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.138914] ? release_sock+0x1d4/0x2a0 [ 43.142865] ? _raw_spin_unlock_bh+0x30/0x40 [ 43.147245] ? release_sock+0x1d4/0x2a0 [ 43.151200] ? udp_v6_get_port+0x9c/0xc0 [ 43.155241] inet_sendmsg+0x11f/0x5e0 [ 43.159014] ? inet_sendmsg+0x11f/0x5e0 [ 43.162960] ? __might_sleep+0x95/0x190 [ 43.166909] ? inet_recvmsg+0x5f0/0x5f0 [ 43.170862] ? selinux_socket_sendmsg+0x36/0x40 [ 43.175500] ? security_socket_sendmsg+0x89/0xb0 [ 43.180227] ? inet_recvmsg+0x5f0/0x5f0 [ 43.184176] sock_sendmsg+0xca/0x110 [ 43.187864] SYSC_sendto+0x358/0x5a0 [ 43.191556] ? SYSC_connect+0x480/0x480 [ 43.195512] ? mm_fault_error+0x2c0/0x2c0 [ 43.199635] ? ipv6_setsockopt+0xa8/0x150 [ 43.203763] ? __do_page_fault+0xd60/0xd60 [ 43.207982] ? lockdep_sys_exit+0x47/0xf0 [ 43.212104] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 43.216919] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.221910] SyS_sendto+0x40/0x50 [ 43.225338] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 43.230066] RIP: 0033:0x43fea9 [ 43.233227] RSP: 002b:00007ffdbd82d5e8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 43.240911] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 43.248164] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 43.255414] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 43.262655] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 43.269896] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 43.277323] Dumping ftrace buffer: [ 43.280897] (ftrace buffer empty) [ 43.284581] Kernel Offset: disabled [ 43.288189] Rebooting in 86400 seconds..