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-8,10.128.0.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.485657] ------------[ cut here ]------------ [ 43.490563] WARNING: CPU: 0 PID: 2982 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70 [ 43.498668] Kernel panic - not syncing: panic_on_warn set ... [ 43.498668] [ 43.506006] CPU: 0 PID: 2982 Comm: syzkaller554878 Not tainted 4.14.0-rc4-mm1+ #16 [ 43.513684] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.523013] Call Trace: [ 43.525580] dump_stack+0x194/0x257 [ 43.529184] ? arch_local_irq_restore+0x53/0x53 [ 43.533838] panic+0x1e4/0x41c [ 43.537007] ? refcount_error_report+0x214/0x214 [ 43.541736] ? show_regs_print_info+0x65/0x65 [ 43.546217] ? kmalloc_slab+0x5d/0x70 [ 43.549990] __warn+0x1c4/0x1e0 [ 43.553242] ? kmalloc_slab+0x5d/0x70 [ 43.557027] report_bug+0x211/0x2d0 [ 43.560632] fixup_bug+0x40/0x90 [ 43.563979] do_trap+0x260/0x390 [ 43.567328] do_error_trap+0x120/0x390 [ 43.571193] ? do_trap+0x390/0x390 [ 43.574706] ? kmalloc_slab+0x5d/0x70 [ 43.578490] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.583309] do_invalid_op+0x1b/0x20 [ 43.586996] invalid_op+0x18/0x20 [ 43.590421] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 43.594804] RSP: 0018:ffff8801ce03f4b0 EFLAGS: 00010246 [ 43.600148] RAX: 0000000000000000 RBX: ffff8801ce03f748 RCX: 0000000000000007 [ 43.607393] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 43.614640] RBP: ffff8801ce03f4b0 R08: ffff8801d3541700 R09: ffff8801ce03fb10 [ 43.621882] R10: ffff8801ce47a2c0 R11: 0000000000000000 R12: ffff8801ce03fab0 [ 43.629125] R13: ffff8801ce03fb10 R14: 00000000014080c0 R15: ffff8801cf5a57c0 [ 43.636392] __kmalloc+0x25/0x760 [ 43.639823] ? inet6_dump_ifaddr+0x30/0x30 [ 43.644034] ? ip6_setup_cork+0x1e8/0x15c0 [ 43.648250] ip6_setup_cork+0x1e8/0x15c0 [ 43.652293] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 43.657578] ip6_make_skb+0x282/0x530 [ 43.661357] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.665657] ? ip6_push_pending_frames+0xe0/0xe0 [ 43.670391] ? ip6_dst_hoplimit+0x10d/0x420 [ 43.674688] ? ip6_route_output_flags+0x1f1/0x2b0 [ 43.679516] ? __lock_is_held+0xbc/0x140 [ 43.683565] ? ip6_dst_hoplimit+0xc1/0x420 [ 43.687773] ? ip6_find_1stfragopt+0x240/0x240 [ 43.692335] udpv6_sendmsg+0x2769/0x3380 [ 43.696370] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.700677] ? udpv6_setsockopt+0x80/0x80 [ 43.704797] ? find_held_lock+0x39/0x1d0 [ 43.708844] ? lock_downgrade+0x990/0x990 [ 43.712963] ? lock_downgrade+0x990/0x990 [ 43.717085] ? lock_release+0xd70/0xd70 [ 43.721046] ? do_raw_spin_trylock+0x190/0x190 [ 43.725617] ? __local_bh_enable_ip+0x9d/0x160 [ 43.730174] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.735163] ? release_sock+0x1d4/0x2a0 [ 43.739115] ? _raw_spin_unlock_bh+0x30/0x40 [ 43.743505] ? release_sock+0x1d4/0x2a0 [ 43.747460] ? udp_v6_get_port+0x9c/0xc0 [ 43.751501] inet_sendmsg+0x11f/0x5e0 [ 43.755274] ? inet_sendmsg+0x11f/0x5e0 [ 43.759224] ? __might_sleep+0x95/0x190 [ 43.763170] ? inet_recvmsg+0x5f0/0x5f0 [ 43.767122] ? selinux_socket_sendmsg+0x36/0x40 [ 43.771767] ? security_socket_sendmsg+0x89/0xb0 [ 43.776496] ? inet_recvmsg+0x5f0/0x5f0 [ 43.780450] sock_sendmsg+0xca/0x110 [ 43.784139] SYSC_sendto+0x358/0x5a0 [ 43.787829] ? SYSC_connect+0x480/0x480 [ 43.791788] ? mm_fault_error+0x2c0/0x2c0 [ 43.795913] ? ipv6_setsockopt+0xa8/0x150 [ 43.800043] ? __do_page_fault+0xd60/0xd60 [ 43.804258] ? lockdep_sys_exit+0x47/0xf0 [ 43.808378] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 43.813197] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.818185] SyS_sendto+0x40/0x50 [ 43.821615] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 43.826343] RIP: 0033:0x43fea9 [ 43.829515] RSP: 002b:00007ffc326cc3d8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 43.837198] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 43.844439] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 43.851681] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c [ 43.858921] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 43.866160] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 43.873565] Dumping ftrace buffer: [ 43.877120] (ftrace buffer empty) [ 43.880811] Kernel Offset: disabled [ 43.884419] Rebooting in 86400 seconds..