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-0,10.128.0.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.177680] ------------[ cut here ]------------ [ 35.178421] WARNING: CPU: 1 PID: 2982 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 35.179637] Kernel panic - not syncing: panic_on_warn set ... [ 35.179637] [ 35.180625] CPU: 1 PID: 2982 Comm: syzkaller957157 Not tainted 4.14.0-rc3+ #115 [ 35.181619] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.182876] Call Trace: [ 35.183242] dump_stack+0x194/0x257 [ 35.183737] ? arch_local_irq_restore+0x53/0x53 [ 35.184376] panic+0x1e4/0x417 [ 35.184832] ? __warn+0x1d9/0x1d9 [ 35.185301] ? show_regs_print_info+0x65/0x65 [ 35.185921] ? kmalloc_slab+0x5d/0x70 [ 35.186439] __warn+0x1c4/0x1d9 [ 35.186912] ? kmalloc_slab+0x5d/0x70 [ 35.187445] report_bug+0x211/0x2d0 [ 35.187984] fixup_bug+0x40/0x90 [ 35.188446] do_trap+0x260/0x390 [ 35.188912] do_error_trap+0x120/0x390 [ 35.189445] ? do_trap+0x390/0x390 [ 35.189927] ? kmalloc_slab+0x5d/0x70 [ 35.190476] ? lock_release+0xd70/0xd70 [ 35.191046] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.191698] do_invalid_op+0x1b/0x20 [ 35.192203] invalid_op+0x18/0x20 [ 35.192670] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 35.193261] RSP: 0018:ffff8801ceba74b0 EFLAGS: 00010246 [ 35.193988] RAX: 0000000000000000 RBX: ffff8801ceba7748 RCX: 0000000000000007 [ 35.194947] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 35.195906] RBP: ffff8801ceba74b0 R08: ffff8801cdc9e380 R09: ffff8801ceba7b10 [ 35.196926] R10: ffff8801cf1b85c0 R11: 0000000000000000 R12: ffff8801ceba7ab0 [ 35.198681] R13: ffff8801ceba7b10 R14: 00000000014080c0 R15: ffff8801cf0d87c0 [ 35.205947] __kmalloc+0x25/0x760 [ 35.209378] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 35.214020] ? ip6_setup_cork+0x1e8/0x15c0 [ 35.218231] ip6_setup_cork+0x1e8/0x15c0 [ 35.222359] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 35.227617] ip6_make_skb+0x282/0x530 [ 35.231392] ? ip_reply_glue_bits+0xb0/0xb0 [ 35.235688] ? ip6_push_pending_frames+0xe0/0xe0 [ 35.240417] ? ip6_dst_hoplimit+0x10d/0x420 [ 35.244716] ? ip6_route_output_flags+0x1f1/0x2b0 [ 35.249540] ? __lock_is_held+0xbc/0x140 [ 35.253586] ? ip6_dst_hoplimit+0xc1/0x420 [ 35.257798] ? ip6_find_1stfragopt+0x240/0x240 [ 35.262359] udpv6_sendmsg+0x2769/0x3380 [ 35.266397] ? ip_reply_glue_bits+0xb0/0xb0 [ 35.270707] ? udpv6_setsockopt+0x80/0x80 [ 35.274826] ? find_held_lock+0x39/0x1d0 [ 35.278869] ? lock_downgrade+0x990/0x990 [ 35.282989] ? lock_downgrade+0x990/0x990 [ 35.287112] ? lock_release+0xd70/0xd70 [ 35.291070] ? do_raw_spin_trylock+0x190/0x190 [ 35.295629] ? __local_bh_enable_ip+0x9d/0x160 [ 35.300182] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.305170] ? release_sock+0x1d4/0x2a0 [ 35.309123] ? _raw_spin_unlock_bh+0x30/0x40 [ 35.313505] ? release_sock+0x1d4/0x2a0 [ 35.317464] ? udp_v6_get_port+0x9c/0xc0 [ 35.321504] inet_sendmsg+0x11f/0x5e0 [ 35.325285] ? inet_sendmsg+0x11f/0x5e0 [ 35.329234] ? __might_sleep+0x95/0x190 [ 35.333182] ? inet_recvmsg+0x5f0/0x5f0 [ 35.337138] ? selinux_socket_sendmsg+0x36/0x40 [ 35.341782] ? security_socket_sendmsg+0x89/0xb0 [ 35.346514] ? inet_recvmsg+0x5f0/0x5f0 [ 35.350465] sock_sendmsg+0xca/0x110 [ 35.354154] SYSC_sendto+0x358/0x5a0 [ 35.357854] ? SYSC_connect+0x480/0x480 [ 35.361830] ? mm_fault_error+0x2c0/0x2c0 [ 35.365960] ? ipv6_setsockopt+0xa8/0x150 [ 35.370096] ? __do_page_fault+0xd60/0xd60 [ 35.374317] ? lockdep_sys_exit+0x47/0xf0 [ 35.378443] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 35.383259] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.388250] SyS_sendto+0x40/0x50 [ 35.391680] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 35.396406] RIP: 0033:0x43fea9 [ 35.399567] RSP: 002b:00007ffc715e2358 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 35.407249] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 35.414493] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 35.421732] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 35.428970] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 35.436210] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 35.443937] Dumping ftrace buffer: [ 35.447487] (ftrace buffer empty) [ 35.451169] Kernel Offset: disabled [ 35.454779] Rebooting in 86400 seconds..