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-386-3,10.128.0.33' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.332908] ------------[ cut here ]------------ [ 31.338306] WARNING: CPU: 1 PID: 2987 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 31.346806] Kernel panic - not syncing: panic_on_warn set ... [ 31.346806] [ 31.354153] CPU: 1 PID: 2987 Comm: syzkaller667487 Not tainted 4.14.0-rc4+ #41 [ 31.361482] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.370808] Call Trace: [ 31.373374] dump_stack+0x194/0x257 [ 31.376977] ? arch_local_irq_restore+0x53/0x53 [ 31.381630] panic+0x1e4/0x417 [ 31.384795] ? __warn+0x1d9/0x1d9 [ 31.388218] ? show_regs_print_info+0x65/0x65 [ 31.392701] ? kmalloc_slab+0x5d/0x70 [ 31.396474] __warn+0x1c4/0x1d9 [ 31.399726] ? kmalloc_slab+0x5d/0x70 [ 31.403501] report_bug+0x211/0x2d0 [ 31.407107] fixup_bug+0x40/0x90 [ 31.410449] do_trap+0x260/0x390 [ 31.413792] do_error_trap+0x120/0x390 [ 31.417658] ? do_trap+0x390/0x390 [ 31.421170] ? kmalloc_slab+0x5d/0x70 [ 31.424945] ? lock_release+0xd70/0xd70 [ 31.428907] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.433728] do_invalid_op+0x1b/0x20 [ 31.437421] invalid_op+0x18/0x20 [ 31.440844] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 31.445220] RSP: 0018:ffff8801cf267310 EFLAGS: 00010246 [ 31.450556] RAX: 0000000000000000 RBX: ffff8801cf2675a8 RCX: 0000000000000007 [ 31.457796] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff [ 31.465035] RBP: ffff8801cf267310 R08: ffff8801d095ba80 R09: ffff8801cf267970 [ 31.472274] R10: ffff8801cf7584c0 R11: 0000000000000000 R12: ffff8801cf267910 [ 31.479515] R13: ffff8801cf267970 R14: 00000000014080c0 R15: ffff8801ceadc7c0 [ 31.486779] __kmalloc+0x25/0x760 [ 31.490208] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 31.494847] ? ip6_setup_cork+0x1e8/0x15c0 [ 31.499059] ip6_setup_cork+0x1e8/0x15c0 [ 31.503097] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 31.508354] ip6_make_skb+0x282/0x530 [ 31.512131] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.516426] ? ip6_push_pending_frames+0xe0/0xe0 [ 31.521157] ? ip6_dst_hoplimit+0x10d/0x420 [ 31.525454] ? ip6_route_output_flags+0x1f1/0x2b0 [ 31.530279] ? __lock_is_held+0xbc/0x140 [ 31.534323] ? ip6_dst_hoplimit+0xc1/0x420 [ 31.538530] ? ip6_find_1stfragopt+0x240/0x240 [ 31.543089] udpv6_sendmsg+0x2769/0x3380 [ 31.547146] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.551460] ? udpv6_setsockopt+0x80/0x80 [ 31.555597] ? lock_downgrade+0x990/0x990 [ 31.559717] ? lock_downgrade+0x990/0x990 [ 31.563850] ? lock_release+0xd70/0xd70 [ 31.567819] ? __local_bh_enable_ip+0x9d/0x160 [ 31.572373] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.577360] ? release_sock+0x1d4/0x2a0 [ 31.581311] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.585690] ? release_sock+0x1d4/0x2a0 [ 31.589646] ? udp_v6_get_port+0x9c/0xc0 [ 31.593686] inet_sendmsg+0x11f/0x5e0 [ 31.597462] ? inet_sendmsg+0x11f/0x5e0 [ 31.601408] ? __might_sleep+0x95/0x190 [ 31.605354] ? inet_recvmsg+0x5f0/0x5f0 [ 31.609303] ? selinux_socket_sendmsg+0x36/0x40 [ 31.613948] ? security_socket_sendmsg+0x89/0xb0 [ 31.618676] ? inet_recvmsg+0x5f0/0x5f0 [ 31.622624] sock_sendmsg+0xca/0x110 [ 31.626311] SYSC_sendto+0x358/0x5a0 [ 31.629999] ? SYSC_connect+0x480/0x480 [ 31.633975] ? __handle_mm_fault+0x39c0/0x39c0 [ 31.638529] ? vmacache_find+0x5f/0x280 [ 31.642482] ? up_read+0x1a/0x40 [ 31.645821] ? __do_page_fault+0x3d6/0xd60 [ 31.650037] SyS_sendto+0x40/0x50 [ 31.653460] ? SyS_getpeername+0x30/0x30 [ 31.657496] do_fast_syscall_32+0x3f2/0xf05 [ 31.661796] ? do_int80_syscall_32+0x940/0x940 [ 31.666351] ? kasan_check_read+0x11/0x20 [ 31.670471] ? syscall_return_slowpath+0x510/0x510 [ 31.675371] ? SyS_rt_sigaction+0x94/0x1b0 [ 31.679580] ? lockdep_sys_exit+0x47/0xf0 [ 31.683702] ? retint_user+0x18/0x20 [ 31.687391] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.692210] entry_SYSENTER_compat+0x51/0x60 [ 31.696589] RIP: 0023:0xf7f27c79 [ 31.699925] RSP: 002b:00000000ffd149ec EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 31.707606] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000002052bfcc [ 31.714844] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020e0afe4 [ 31.722083] RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000 [ 31.729321] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.736561] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.743990] Dumping ftrace buffer: [ 31.747555] (ftrace buffer empty) [ 31.751235] Kernel Offset: disabled [ 31.754840] Rebooting in 86400 seconds..