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-5,10.128.0.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.703945] ------------[ cut here ]------------ [ 40.708744] WARNING: CPU: 0 PID: 2980 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 40.716735] Kernel panic - not syncing: panic_on_warn set ... [ 40.716735] [ 40.724067] CPU: 0 PID: 2980 Comm: syzkaller031846 Not tainted 4.14.0-rc4+ #130 [ 40.731479] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.740801] Call Trace: [ 40.743361] dump_stack+0x194/0x257 [ 40.746961] ? arch_local_irq_restore+0x53/0x53 [ 40.751617] panic+0x1e4/0x417 [ 40.754781] ? __warn+0x1d9/0x1d9 [ 40.758204] ? show_regs_print_info+0x65/0x65 [ 40.762685] ? kmalloc_slab+0x5d/0x70 [ 40.766454] __warn+0x1c4/0x1d9 [ 40.769705] ? kmalloc_slab+0x5d/0x70 [ 40.773478] report_bug+0x211/0x2d0 [ 40.777082] fixup_bug+0x40/0x90 [ 40.780420] do_trap+0x260/0x390 [ 40.783764] do_error_trap+0x120/0x390 [ 40.787624] ? do_trap+0x390/0x390 [ 40.791133] ? kmalloc_slab+0x5d/0x70 [ 40.794904] ? lock_release+0xd70/0xd70 [ 40.798857] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.803676] do_invalid_op+0x1b/0x20 [ 40.807362] invalid_op+0x18/0x20 [ 40.810786] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 40.815162] RSP: 0018:ffff8801cf7df4b0 EFLAGS: 00010246 [ 40.820495] RAX: 0000000000000000 RBX: ffff8801cf7df748 RCX: 0000000000000007 [ 40.827734] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 40.834971] RBP: ffff8801cf7df4b0 R08: ffff8801d3429540 R09: ffff8801cf7dfb10 [ 40.842208] R10: ffff8801cf0ba540 R11: 0000000000000000 R12: ffff8801cf7dfab0 [ 40.849447] R13: ffff8801cf7dfb10 R14: 00000000014080c0 R15: ffff8801ce6c07c0 [ 40.856707] __kmalloc+0x25/0x760 [ 40.860137] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 40.864778] ? ip6_setup_cork+0x1e8/0x15c0 [ 40.868990] ip6_setup_cork+0x1e8/0x15c0 [ 40.873028] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 40.878284] ip6_make_skb+0x282/0x530 [ 40.882056] ? ip_reply_glue_bits+0xb0/0xb0 [ 40.886350] ? ip6_push_pending_frames+0xe0/0xe0 [ 40.891083] ? ip6_dst_hoplimit+0x10d/0x420 [ 40.895375] ? ip6_route_output_flags+0x1f1/0x2b0 [ 40.900200] ? __lock_is_held+0xbc/0x140 [ 40.904242] ? ip6_dst_hoplimit+0xc1/0x420 [ 40.908448] ? ip6_find_1stfragopt+0x240/0x240 [ 40.913009] udpv6_sendmsg+0x2769/0x3380 [ 40.917045] ? ip_reply_glue_bits+0xb0/0xb0 [ 40.921349] ? udpv6_setsockopt+0x80/0x80 [ 40.925464] ? find_held_lock+0x39/0x1d0 [ 40.929508] ? lock_downgrade+0x990/0x990 [ 40.933627] ? lock_downgrade+0x990/0x990 [ 40.937746] ? lock_release+0xd70/0xd70 [ 40.941702] ? do_raw_spin_trylock+0x190/0x190 [ 40.946260] ? __local_bh_enable_ip+0x9d/0x160 [ 40.950818] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.955806] ? release_sock+0x1d4/0x2a0 [ 40.959755] ? _raw_spin_unlock_bh+0x30/0x40 [ 40.964132] ? release_sock+0x1d4/0x2a0 [ 40.968085] ? udp_v6_get_port+0x9c/0xc0 [ 40.972122] inet_sendmsg+0x11f/0x5e0 [ 40.975891] ? inet_sendmsg+0x11f/0x5e0 [ 40.979835] ? __might_sleep+0x95/0x190 [ 40.983782] ? inet_recvmsg+0x5f0/0x5f0 [ 40.987730] ? selinux_socket_sendmsg+0x36/0x40 [ 40.992374] ? security_socket_sendmsg+0x89/0xb0 [ 40.997102] ? inet_recvmsg+0x5f0/0x5f0 [ 41.001059] sock_sendmsg+0xca/0x110 [ 41.004747] SYSC_sendto+0x358/0x5a0 [ 41.008435] ? SYSC_connect+0x480/0x480 [ 41.012390] ? mm_fault_error+0x2c0/0x2c0 [ 41.016520] ? ipv6_setsockopt+0xa8/0x150 [ 41.020655] ? __do_page_fault+0xd60/0xd60 [ 41.024873] ? lockdep_sys_exit+0x47/0xf0 [ 41.028990] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 41.033805] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.038792] SyS_sendto+0x40/0x50 [ 41.042227] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 41.046949] RIP: 0033:0x43fea9 [ 41.050107] RSP: 002b:00007ffd3c0d86b8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 41.057787] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 41.065027] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 41.072269] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 41.079508] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 41.086750] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 41.094136] Dumping ftrace buffer: [ 41.097689] (ftrace buffer empty) [ 41.101370] Kernel Offset: disabled [ 41.104976] Rebooting in 86400 seconds..