nla_parse: 16 callbacks suppressed
netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'.
==================================================================
BUG: KASAN: alloca-out-of-bounds in tick_sched_handle+0x16d/0x180 kernel/time/tick-sched.c:162
Read of size 8 at addr ffff880195f472f0 by task syz-executor3/11378

CPU: 1 PID: 11378 Comm: syz-executor3 Not tainted 4.16.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b9/0x29f lib/dump_stack.c:53
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0xac/0x2f5 mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 tick_sched_handle+0x16d/0x180 kernel/time/tick-sched.c:162
 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1170
 __run_hrtimer kernel/time/hrtimer.c:1349 [inline]
 __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1411
 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1469
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:862
 </IRQ>
RIP: 0010:rcu_lock_release include/linux/rcupdate.h:251 [inline]
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:688 [inline]
RIP: 0010:nfnetlink_rcv_msg+0x6a7/0xfe0 net/netfilter/nfnetlink.c:196
RSP: 0018:ffff880195f47310 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff12
RAX: 0000000000040000 RBX: ffffffff85ecce70 RCX: ffffc900040b9000
RDX: 0000000000002f05 RSI: ffffffff85e5b429 RDI: ffff880195f471e0
RBP: ffff880195f47480 R08: ffff8801b3ba0000 R09: fffffbfff15cff39
R10: fffffbfff15cff39 R11: ffffffff8ae7f9cf R12: 00000000ffffffea
R13: 0000000000000000 R14: 00000000ffffffea R15: ffff8801cfb34d40
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2446
 nfnetlink_rcv+0x1fe/0x1ba0 net/netfilter/nfnetlink.c:513
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0x9d8/0xf80 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:639
 ___sys_sendmsg+0x805/0x940 net/socket.c:2117
 __sys_sendmsg+0x115/0x270 net/socket.c:2155
 SYSC_sendmsg net/socket.c:2164 [inline]
 SyS_sendmsg+0x29/0x30 net/socket.c:2162
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4552d9
RSP: 002b:00007f2ff06f1c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2ff06f26d4 RCX: 00000000004552d9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004eb R14: 00000000006fa6a8 R15: 0000000000000000

The buggy address belongs to the page:
page:ffffea000657d1c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x2fffc0000000000()
raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 ffffea0006570101 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff880195f47180: 00 00 00 00 00 00 00 00 00 00 00 00 ca ca ca ca
 ffff880195f47200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff880195f47280: 00 00 00 00 00 00 00 00 00 cb cb cb cb cb cb cb
                                                             ^
 ffff880195f47300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff880195f47380: 00 00 00 00 00 00 00 f1 f1 f1 f1 f8 f2 f2 f2 f2
==================================================================