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-2,10.128.0.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.553901] ------------[ cut here ]------------ [ 31.558692] WARNING: CPU: 1 PID: 2982 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70 [ 31.566810] Kernel panic - not syncing: panic_on_warn set ... [ 31.566810] [ 31.574149] CPU: 1 PID: 2982 Comm: syzkaller628138 Not tainted 4.14.0-rc3-mm1+ #14 [ 31.581825] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.591150] Call Trace: [ 31.593710] dump_stack+0x194/0x257 [ 31.597316] ? arch_local_irq_restore+0x53/0x53 [ 31.601967] panic+0x1e4/0x41c [ 31.605130] ? refcount_error_report+0x214/0x214 [ 31.609856] ? show_regs_print_info+0x65/0x65 [ 31.614352] ? kmalloc_slab+0x5d/0x70 [ 31.618139] __warn+0x1c4/0x1e0 [ 31.621391] ? kmalloc_slab+0x5d/0x70 [ 31.625165] report_bug+0x211/0x2d0 [ 31.628769] fixup_bug+0x40/0x90 [ 31.632106] do_trap+0x260/0x390 [ 31.635450] do_error_trap+0x120/0x390 [ 31.639311] ? do_trap+0x390/0x390 [ 31.642826] ? kmalloc_slab+0x5d/0x70 [ 31.646597] ? lock_release+0xd70/0xd70 [ 31.650547] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.655367] do_invalid_op+0x1b/0x20 [ 31.659049] invalid_op+0x18/0x20 [ 31.662469] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 31.666842] RSP: 0018:ffff8801c078f4b0 EFLAGS: 00010246 [ 31.672177] RAX: 0000000000000000 RBX: ffff8801c078f748 RCX: 0000000000000007 [ 31.679416] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 31.686662] RBP: ffff8801c078f4b0 R08: ffff8801d43ec700 R09: ffff8801c078fb10 [ 31.693902] R10: ffff8801d039a300 R11: 0000000000000000 R12: ffff8801c078fab0 [ 31.701227] R13: ffff8801c078fb10 R14: 00000000014080c0 R15: ffff8801ce6557c0 [ 31.708494] __kmalloc+0x25/0x760 [ 31.711931] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 31.716572] ? ip6_setup_cork+0x1e8/0x15c0 [ 31.720787] ip6_setup_cork+0x1e8/0x15c0 [ 31.724824] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 31.730079] ip6_make_skb+0x282/0x530 [ 31.733850] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.738142] ? ip6_push_pending_frames+0xe0/0xe0 [ 31.742864] ? ip6_dst_hoplimit+0x10d/0x420 [ 31.747155] ? ip6_route_output_flags+0x1f1/0x2b0 [ 31.751979] ? __lock_is_held+0xbc/0x140 [ 31.756020] ? ip6_dst_hoplimit+0xc1/0x420 [ 31.760222] ? ip6_find_1stfragopt+0x240/0x240 [ 31.764782] udpv6_sendmsg+0x2769/0x3380 [ 31.768820] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.773129] ? udpv6_setsockopt+0x80/0x80 [ 31.777246] ? find_held_lock+0x39/0x1d0 [ 31.781288] ? lock_downgrade+0x990/0x990 [ 31.785405] ? lock_downgrade+0x990/0x990 [ 31.789523] ? lock_release+0xd70/0xd70 [ 31.793479] ? do_raw_spin_trylock+0x190/0x190 [ 31.798036] ? __local_bh_enable_ip+0x9d/0x160 [ 31.802591] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.807574] ? release_sock+0x1d4/0x2a0 [ 31.811521] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.815899] ? release_sock+0x1d4/0x2a0 [ 31.819852] ? udp_v6_get_port+0x9c/0xc0 [ 31.823891] inet_sendmsg+0x11f/0x5e0 [ 31.827659] ? inet_sendmsg+0x11f/0x5e0 [ 31.831601] ? __might_sleep+0x95/0x190 [ 31.835544] ? inet_recvmsg+0x5f0/0x5f0 [ 31.839490] ? selinux_socket_sendmsg+0x36/0x40 [ 31.844129] ? security_socket_sendmsg+0x89/0xb0 [ 31.848853] ? inet_recvmsg+0x5f0/0x5f0 [ 31.852804] sock_sendmsg+0xca/0x110 [ 31.856491] SYSC_sendto+0x358/0x5a0 [ 31.860181] ? SYSC_connect+0x480/0x480 [ 31.864144] ? mm_fault_error+0x2c0/0x2c0 [ 31.868284] ? ipv6_setsockopt+0xa8/0x150 [ 31.872444] ? __do_page_fault+0xd60/0xd60 [ 31.876703] ? lockdep_sys_exit+0x47/0xf0 [ 31.880859] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 31.885697] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.890710] SyS_sendto+0x40/0x50 [ 31.894175] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.898917] RIP: 0033:0x43fea9 [ 31.902090] RSP: 002b:00007ffd359bc5d8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 31.909771] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 31.917013] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 31.924250] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 31.931489] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 31.938729] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.946449] Dumping ftrace buffer: [ 31.949995] (ftrace buffer empty) [ 31.953675] Kernel Offset: disabled [ 31.957279] Rebooting in 86400 seconds..