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-386-0,10.128.15.198' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.591969] ------------[ cut here ]------------ [ 52.596764] WARNING: CPU: 0 PID: 2985 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 52.604783] Kernel panic - not syncing: panic_on_warn set ... [ 52.604783] [ 52.612118] CPU: 0 PID: 2985 Comm: syzkaller163645 Not tainted 4.14.0-rc4+ #37 [ 52.619446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.628772] Call Trace: [ 52.631334] dump_stack+0x194/0x257 [ 52.634935] ? arch_local_irq_restore+0x53/0x53 [ 52.639588] panic+0x1e4/0x417 [ 52.642750] ? __warn+0x1d9/0x1d9 [ 52.646170] ? show_regs_print_info+0x65/0x65 [ 52.650648] ? kmalloc_slab+0x5d/0x70 [ 52.654419] __warn+0x1c4/0x1d9 [ 52.657668] ? kmalloc_slab+0x5d/0x70 [ 52.661442] report_bug+0x211/0x2d0 [ 52.665044] fixup_bug+0x40/0x90 [ 52.668382] do_trap+0x260/0x390 [ 52.671725] do_error_trap+0x120/0x390 [ 52.675585] ? do_trap+0x390/0x390 [ 52.679097] ? kmalloc_slab+0x5d/0x70 [ 52.682887] ? lock_release+0xd70/0xd70 [ 52.686839] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.691659] do_invalid_op+0x1b/0x20 [ 52.695342] invalid_op+0x18/0x20 [ 52.698762] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 52.703138] RSP: 0018:ffff8801ce757310 EFLAGS: 00010246 [ 52.708475] RAX: 0000000000000000 RBX: ffff8801ce7575a8 RCX: 0000000000000007 [ 52.715714] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff [ 52.722953] RBP: ffff8801ce757310 R08: ffff8801d7fd38c0 R09: ffff8801ce757970 [ 52.730192] R10: ffff8801ceb60180 R11: 0000000000000000 R12: ffff8801ce757910 [ 52.737437] R13: ffff8801ce757970 R14: 00000000014080c0 R15: ffff8801d06d07c0 [ 52.744704] __kmalloc+0x25/0x760 [ 52.748134] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 52.752773] ? ip6_setup_cork+0x1e8/0x15c0 [ 52.756981] ip6_setup_cork+0x1e8/0x15c0 [ 52.761020] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 52.766278] ip6_make_skb+0x282/0x530 [ 52.770052] ? ip_reply_glue_bits+0xb0/0xb0 [ 52.774343] ? ip6_push_pending_frames+0xe0/0xe0 [ 52.779067] ? ip6_dst_hoplimit+0x10d/0x420 [ 52.783358] ? ip6_route_output_flags+0x1f1/0x2b0 [ 52.788181] ? __lock_is_held+0xbc/0x140 [ 52.792223] ? ip6_dst_hoplimit+0xc1/0x420 [ 52.796427] ? ip6_find_1stfragopt+0x240/0x240 [ 52.800990] udpv6_sendmsg+0x2769/0x3380 [ 52.805036] ? ip_reply_glue_bits+0xb0/0xb0 [ 52.809342] ? udpv6_setsockopt+0x80/0x80 [ 52.813471] ? lock_downgrade+0x990/0x990 [ 52.817589] ? lock_downgrade+0x990/0x990 [ 52.821707] ? lock_release+0xd70/0xd70 [ 52.825669] ? __local_bh_enable_ip+0x9d/0x160 [ 52.830223] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 52.835208] ? release_sock+0x1d4/0x2a0 [ 52.839158] ? _raw_spin_unlock_bh+0x30/0x40 [ 52.843535] ? release_sock+0x1d4/0x2a0 [ 52.847489] ? udp_v6_get_port+0x9c/0xc0 [ 52.851527] inet_sendmsg+0x11f/0x5e0 [ 52.855300] ? inet_sendmsg+0x11f/0x5e0 [ 52.859245] ? __might_sleep+0x95/0x190 [ 52.863189] ? inet_recvmsg+0x5f0/0x5f0 [ 52.867137] ? selinux_socket_sendmsg+0x36/0x40 [ 52.871773] ? security_socket_sendmsg+0x89/0xb0 [ 52.876872] ? inet_recvmsg+0x5f0/0x5f0 [ 52.880820] sock_sendmsg+0xca/0x110 [ 52.884507] SYSC_sendto+0x358/0x5a0 [ 52.888194] ? SYSC_connect+0x480/0x480 [ 52.892166] ? __handle_mm_fault+0x39c0/0x39c0 [ 52.896717] ? vmacache_find+0x5f/0x280 [ 52.900669] ? up_read+0x1a/0x40 [ 52.904004] ? __do_page_fault+0x3d6/0xd60 [ 52.908306] SyS_sendto+0x40/0x50 [ 52.911728] ? SyS_getpeername+0x30/0x30 [ 52.915762] do_fast_syscall_32+0x3f2/0xf05 [ 52.920060] ? do_int80_syscall_32+0x940/0x940 [ 52.924613] ? kasan_check_read+0x11/0x20 [ 52.928731] ? syscall_return_slowpath+0x510/0x510 [ 52.933630] ? SyS_rt_sigaction+0x94/0x1b0 [ 52.937837] ? lockdep_sys_exit+0x47/0xf0 [ 52.941953] ? retint_user+0x18/0x20 [ 52.945641] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.950458] entry_SYSENTER_compat+0x51/0x60 [ 52.954833] RIP: 0023:0xf7f98c79 [ 52.958165] RSP: 002b:00000000ff92ac9c EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 52.965843] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020fd1000 [ 52.973080] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020e0afe4 [ 52.980318] RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000 [ 52.987558] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 52.994794] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 53.002175] Dumping ftrace buffer: [ 53.005722] (ftrace buffer empty) [ 53.009401] Kernel Offset: disabled [ 53.013005] Rebooting in 86400 seconds..