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-net-kasan-gce-4,10.128.0.37' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.562742] ------------[ cut here ]------------ [ 42.567549] WARNING: CPU: 0 PID: 2983 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 42.575566] Kernel panic - not syncing: panic_on_warn set ... [ 42.575566] [ 42.582902] CPU: 0 PID: 2983 Comm: syzkaller374368 Not tainted 4.14.0-rc3+ #71 [ 42.590230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.599553] Call Trace: [ 42.602116] dump_stack+0x194/0x257 [ 42.605719] ? arch_local_irq_restore+0x53/0x53 [ 42.610376] panic+0x1e4/0x417 [ 42.613542] ? __warn+0x1d9/0x1d9 [ 42.616965] ? show_regs_print_info+0x65/0x65 [ 42.621453] ? kmalloc_slab+0x5d/0x70 [ 42.625222] __warn+0x1c4/0x1d9 [ 42.628471] ? kmalloc_slab+0x5d/0x70 [ 42.632245] report_bug+0x211/0x2d0 [ 42.635847] fixup_bug+0x40/0x90 [ 42.639183] do_trap+0x260/0x390 [ 42.642524] do_error_trap+0x120/0x390 [ 42.646385] ? do_trap+0x390/0x390 [ 42.649893] ? kmalloc_slab+0x5d/0x70 [ 42.653666] ? lock_release+0xd70/0xd70 [ 42.657615] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.662433] do_invalid_op+0x1b/0x20 [ 42.666115] invalid_op+0x18/0x20 [ 42.669535] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 42.673909] RSP: 0018:ffff8801ce0b74b0 EFLAGS: 00010246 [ 42.679251] RAX: 0000000000000000 RBX: ffff8801ce0b7748 RCX: 0000000000000007 [ 42.686493] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 42.693730] RBP: ffff8801ce0b74b0 R08: ffff8801d4c77c40 R09: ffff8801ce0b7b10 [ 42.700969] R10: ffff8801d005c2c0 R11: 0000000000000000 R12: ffff8801ce0b7ab0 [ 42.708208] R13: ffff8801ce0b7b10 R14: 00000000014080c0 R15: ffff8801cff5a000 [ 42.715471] __kmalloc+0x25/0x760 [ 42.718900] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 42.723536] ? ip6_setup_cork+0x1e8/0x15c0 [ 42.727743] ip6_setup_cork+0x1e8/0x15c0 [ 42.731780] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 42.737035] ip6_make_skb+0x282/0x530 [ 42.740807] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.745101] ? ip6_push_pending_frames+0xe0/0xe0 [ 42.749827] ? ip6_dst_hoplimit+0x10d/0x420 [ 42.754119] ? ip6_route_output_flags+0x1f1/0x2b0 [ 42.758944] ? __lock_is_held+0xbc/0x140 [ 42.762989] ? ip6_dst_hoplimit+0xc1/0x420 [ 42.767192] ? ip6_find_1stfragopt+0x240/0x240 [ 42.771755] udpv6_sendmsg+0x2769/0x3380 [ 42.775790] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.780095] ? udpv6_setsockopt+0x80/0x80 [ 42.784211] ? find_held_lock+0x39/0x1d0 [ 42.788253] ? lock_downgrade+0x990/0x990 [ 42.792370] ? lock_downgrade+0x990/0x990 [ 42.796487] ? lock_release+0xd70/0xd70 [ 42.800442] ? do_raw_spin_trylock+0x190/0x190 [ 42.804998] ? __local_bh_enable_ip+0x9d/0x160 [ 42.809553] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.814540] ? release_sock+0x1d4/0x2a0 [ 42.818491] ? _raw_spin_unlock_bh+0x30/0x40 [ 42.822867] ? release_sock+0x1d4/0x2a0 [ 42.826818] ? udp_v6_get_port+0x9c/0xc0 [ 42.830857] inet_sendmsg+0x11f/0x5e0 [ 42.834623] ? inet_sendmsg+0x11f/0x5e0 [ 42.838568] ? __might_sleep+0x95/0x190 [ 42.842513] ? inet_recvmsg+0x5f0/0x5f0 [ 42.846459] ? selinux_socket_sendmsg+0x36/0x40 [ 42.851099] ? security_socket_sendmsg+0x89/0xb0 [ 42.855821] ? inet_recvmsg+0x5f0/0x5f0 [ 42.859768] sock_sendmsg+0xca/0x110 [ 42.863451] SYSC_sendto+0x358/0x5a0 [ 42.867138] ? SYSC_connect+0x480/0x480 [ 42.871091] ? mm_fault_error+0x2c0/0x2c0 [ 42.875211] ? ipv6_setsockopt+0xa8/0x150 [ 42.879337] ? __do_page_fault+0xd60/0xd60 [ 42.883557] ? lockdep_sys_exit+0x47/0xf0 [ 42.887672] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 42.892489] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.897477] SyS_sendto+0x40/0x50 [ 42.900904] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.905629] RIP: 0033:0x43fea9 [ 42.908788] RSP: 002b:00007ffe94ff4448 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 42.916465] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 42.923702] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 42.930941] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 42.938180] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 42.945419] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 42.953118] Dumping ftrace buffer: [ 42.956670] (ftrace buffer empty) [ 42.960349] Kernel Offset: disabled [ 42.963950] Rebooting in 86400 seconds..