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-0,10.128.0.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.539421] ------------[ cut here ]------------ [ 31.544212] WARNING: CPU: 1 PID: 2980 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 31.552222] Kernel panic - not syncing: panic_on_warn set ... [ 31.552222] [ 31.559560] CPU: 1 PID: 2980 Comm: syzkaller363289 Not tainted 4.14.0-rc4+ #130 [ 31.566976] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.576300] Call Trace: [ 31.578861] dump_stack+0x194/0x257 [ 31.582463] ? arch_local_irq_restore+0x53/0x53 [ 31.587113] panic+0x1e4/0x417 [ 31.590276] ? __warn+0x1d9/0x1d9 [ 31.593699] ? show_regs_print_info+0x65/0x65 [ 31.598178] ? kmalloc_slab+0x5d/0x70 [ 31.601948] __warn+0x1c4/0x1d9 [ 31.605199] ? kmalloc_slab+0x5d/0x70 [ 31.608974] report_bug+0x211/0x2d0 [ 31.612578] fixup_bug+0x40/0x90 [ 31.615916] do_trap+0x260/0x390 [ 31.619261] do_error_trap+0x120/0x390 [ 31.623123] ? do_trap+0x390/0x390 [ 31.626635] ? kmalloc_slab+0x5d/0x70 [ 31.630409] ? lock_release+0xd70/0xd70 [ 31.634361] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.639180] do_invalid_op+0x1b/0x20 [ 31.642865] invalid_op+0x18/0x20 [ 31.646286] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 31.650660] RSP: 0018:ffff8801ce0674b0 EFLAGS: 00010246 [ 31.655996] RAX: 0000000000000000 RBX: ffff8801ce067748 RCX: 0000000000000007 [ 31.663236] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 31.670476] RBP: ffff8801ce0674b0 R08: ffff8801d1d58a80 R09: ffff8801ce067b10 [ 31.677715] R10: ffff8801d0760180 R11: 0000000000000000 R12: ffff8801ce067ab0 [ 31.684956] R13: ffff8801ce067b10 R14: 00000000014080c0 R15: ffff8801ce05f7c0 [ 31.692224] __kmalloc+0x25/0x760 [ 31.695654] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 31.700293] ? ip6_setup_cork+0x1e8/0x15c0 [ 31.704501] ip6_setup_cork+0x1e8/0x15c0 [ 31.708540] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 31.713799] ip6_make_skb+0x282/0x530 [ 31.717573] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.721869] ? ip6_push_pending_frames+0xe0/0xe0 [ 31.726594] ? ip6_dst_hoplimit+0x10d/0x420 [ 31.731439] ? ip6_route_output_flags+0x1f1/0x2b0 [ 31.736265] ? __lock_is_held+0xbc/0x140 [ 31.740308] ? ip6_dst_hoplimit+0xc1/0x420 [ 31.744517] ? ip6_find_1stfragopt+0x240/0x240 [ 31.749081] udpv6_sendmsg+0x2769/0x3380 [ 31.753117] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.757421] ? udpv6_setsockopt+0x80/0x80 [ 31.761536] ? find_held_lock+0x39/0x1d0 [ 31.765579] ? lock_downgrade+0x990/0x990 [ 31.769696] ? lock_downgrade+0x990/0x990 [ 31.773815] ? lock_release+0xd70/0xd70 [ 31.777769] ? do_raw_spin_trylock+0x190/0x190 [ 31.782329] ? __local_bh_enable_ip+0x9d/0x160 [ 31.786969] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.791956] ? release_sock+0x1d4/0x2a0 [ 31.795904] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.800282] ? release_sock+0x1d4/0x2a0 [ 31.804234] ? udp_v6_get_port+0x9c/0xc0 [ 31.808276] inet_sendmsg+0x11f/0x5e0 [ 31.812045] ? inet_sendmsg+0x11f/0x5e0 [ 31.815988] ? __might_sleep+0x95/0x190 [ 31.819934] ? inet_recvmsg+0x5f0/0x5f0 [ 31.823883] ? selinux_socket_sendmsg+0x36/0x40 [ 31.828520] ? security_socket_sendmsg+0x89/0xb0 [ 31.833245] ? inet_recvmsg+0x5f0/0x5f0 [ 31.837193] sock_sendmsg+0xca/0x110 [ 31.840880] SYSC_sendto+0x358/0x5a0 [ 31.844568] ? SYSC_connect+0x480/0x480 [ 31.848523] ? mm_fault_error+0x2c0/0x2c0 [ 31.852642] ? ipv6_setsockopt+0xa8/0x150 [ 31.856794] ? __do_page_fault+0xd60/0xd60 [ 31.861013] ? lockdep_sys_exit+0x47/0xf0 [ 31.865133] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 31.869947] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.874937] SyS_sendto+0x40/0x50 [ 31.878365] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.883088] RIP: 0033:0x43fea9 [ 31.886247] RSP: 002b:00007ffca8172628 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 31.893924] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 31.901162] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 31.908401] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 31.915641] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 31.922968] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.930373] Dumping ftrace buffer: [ 31.933926] (ftrace buffer empty) [ 31.937606] Kernel Offset: disabled [ 31.941210] Rebooting in 86400 seconds..