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-mmots-kasan-gce-5,10.128.15.216' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.108628] ------------[ cut here ]------------ [ 31.113435] WARNING: CPU: 1 PID: 2985 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70 [ 31.121599] Kernel panic - not syncing: panic_on_warn set ... [ 31.121599] [ 31.128939] CPU: 1 PID: 2985 Comm: syzkaller301190 Not tainted 4.14.0-rc3-mm1+ #13 [ 31.136615] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.145938] Call Trace: [ 31.148506] dump_stack+0x194/0x257 [ 31.152111] ? arch_local_irq_restore+0x53/0x53 [ 31.156768] panic+0x1e4/0x41c [ 31.159936] ? refcount_error_report+0x214/0x214 [ 31.164663] ? show_regs_print_info+0x65/0x65 [ 31.169149] ? kmalloc_slab+0x5d/0x70 [ 31.172922] __warn+0x1c4/0x1e0 [ 31.176175] ? kmalloc_slab+0x5d/0x70 [ 31.179950] report_bug+0x211/0x2d0 [ 31.183557] fixup_bug+0x40/0x90 [ 31.186898] do_trap+0x260/0x390 [ 31.190242] do_error_trap+0x120/0x390 [ 31.194104] ? do_trap+0x390/0x390 [ 31.197619] ? kmalloc_slab+0x5d/0x70 [ 31.201393] ? lock_release+0xd70/0xd70 [ 31.205348] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.210168] do_invalid_op+0x1b/0x20 [ 31.213852] invalid_op+0x18/0x20 [ 31.217274] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 31.221650] RSP: 0018:ffff8801c092f4b0 EFLAGS: 00010246 [ 31.226986] RAX: 0000000000000000 RBX: ffff8801c092f748 RCX: 0000000000000007 [ 31.234234] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 31.241473] RBP: ffff8801c092f4b0 R08: ffff8801c0f7a700 R09: ffff8801c092fb10 [ 31.248712] R10: ffff8801cdda8300 R11: 0000000000000000 R12: ffff8801c092fab0 [ 31.255951] R13: ffff8801c092fb10 R14: 00000000014080c0 R15: ffff8801cf1f77c0 [ 31.263217] __kmalloc+0x25/0x760 [ 31.266650] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 31.271288] ? ip6_setup_cork+0x1e8/0x15c0 [ 31.275498] ip6_setup_cork+0x1e8/0x15c0 [ 31.279538] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 31.284799] ip6_make_skb+0x282/0x530 [ 31.288574] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.292868] ? ip6_push_pending_frames+0xe0/0xe0 [ 31.297594] ? ip6_dst_hoplimit+0x10d/0x420 [ 31.301887] ? ip6_route_output_flags+0x1f1/0x2b0 [ 31.306711] ? __lock_is_held+0xbc/0x140 [ 31.310755] ? ip6_dst_hoplimit+0xc1/0x420 [ 31.314964] ? ip6_find_1stfragopt+0x240/0x240 [ 31.319525] udpv6_sendmsg+0x2769/0x3380 [ 31.323558] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.327864] ? udpv6_setsockopt+0x80/0x80 [ 31.331983] ? find_held_lock+0x39/0x1d0 [ 31.336028] ? lock_downgrade+0x990/0x990 [ 31.340147] ? lock_downgrade+0x990/0x990 [ 31.344268] ? lock_release+0xd70/0xd70 [ 31.348225] ? do_raw_spin_trylock+0x190/0x190 [ 31.352786] ? __local_bh_enable_ip+0x9d/0x160 [ 31.357343] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.362333] ? release_sock+0x1d4/0x2a0 [ 31.366286] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.370666] ? release_sock+0x1d4/0x2a0 [ 31.374621] ? udp_v6_get_port+0x9c/0xc0 [ 31.379009] inet_sendmsg+0x11f/0x5e0 [ 31.382779] ? inet_sendmsg+0x11f/0x5e0 [ 31.386725] ? __might_sleep+0x95/0x190 [ 31.390671] ? inet_recvmsg+0x5f0/0x5f0 [ 31.394623] ? selinux_socket_sendmsg+0x36/0x40 [ 31.399261] ? security_socket_sendmsg+0x89/0xb0 [ 31.403986] ? inet_recvmsg+0x5f0/0x5f0 [ 31.407935] sock_sendmsg+0xca/0x110 [ 31.411622] SYSC_sendto+0x358/0x5a0 [ 31.415312] ? SYSC_connect+0x480/0x480 [ 31.419268] ? mm_fault_error+0x2c0/0x2c0 [ 31.423389] ? ipv6_setsockopt+0xa8/0x150 [ 31.427516] ? __do_page_fault+0xd60/0xd60 [ 31.431735] ? lockdep_sys_exit+0x47/0xf0 [ 31.435857] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 31.440672] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.445665] SyS_sendto+0x40/0x50 [ 31.449096] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.453820] RIP: 0033:0x43fea9 [ 31.456981] RSP: 002b:00007ffeb56beb88 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 31.464662] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 31.471901] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 31.479141] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 31.486382] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 31.493622] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 31.501035] Dumping ftrace buffer: [ 31.504605] (ftrace buffer empty) [ 31.508289] Kernel Offset: disabled [ 31.511897] Rebooting in 86400 seconds..