nla_parse: 28 callbacks suppressed
netlink: 12 bytes leftover after parsing attributes in process `syz-executor449'.
==================================================================
BUG: KASAN: stack-out-of-bounds in deref_stack_regs arch/x86/kernel/unwind_orc.c:305 [inline]
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x142e/0x17d0 arch/x86/kernel/unwind_orc.c:437
Read of size 8 at addr ffff8880a331ef68 by task syz-executor449/8558

CPU: 1 PID: 8558 Comm: syz-executor449 Not tainted 4.14.253-syzkaller #0
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+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 deref_stack_regs arch/x86/kernel/unwind_orc.c:305 [inline]
 unwind_next_frame+0x142e/0x17d0 arch/x86/kernel/unwind_orc.c:437
 perf_callchain_kernel+0x38c/0x520 arch/x86/events/core.c:2344
 get_perf_callchain+0x2de/0x740 kernel/events/callchain.c:217
 perf_callchain+0x147/0x190 kernel/events/callchain.c:190
 perf_prepare_sample+0xd77/0x1380 kernel/events/core.c:6166
 __perf_event_output kernel/events/core.c:6282 [inline]
 perf_event_output_forward+0xc9/0x1f0 kernel/events/core.c:6300
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7549
 perf_swevent_hrtimer+0x220/0x350 kernel/events/core.c:8754
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x30b/0xc80 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1104
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:774 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:796 [inline]
RIP: 0010:lock_acquire+0x97/0x3f0 kernel/locking/lockdep.c:3993
RSP: 0018:ffff8880a331ee50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff11e1270 RBX: ffff8880a63c2480 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880a63c2d04
RBP: ffffffff8904ade0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffff8880a63c2480 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
 kernfs_activate+0x2a/0x180 fs/kernfs/dir.c:1235
 retint_kernel+0x2d/0x2d
RIP: 0000:0xffff8880a63c2cd4
RSP: 8904ad80:dffffc0000000000 EFLAGS: ffffffff87400976 ORIG_RAX: ffffffff00000001
RAX: ffffffff8722bd30 RBX: ffffffff81a33f2a RCX: 0000000041b58ab3
RDX: ffffffff88b5b58c RSI: ffffffff8141ca30 RDI: 0000000000000000
RBP: ffffffff8904ade0 R08: ffffffff88b5b250 R09: 0000000041b58ab3
R10: 0000000000000282 R11: 0000000000000002 R12: ffffffff81a342de
R13: ffffffff8904ade0 R14: 1ffff11014663de5 R15: 1ffff11014663de2

The buggy address belongs to the page:
page:ffffea00028cc780 count:0 mapcount:0 mapping:          (null) index:0xffff8880a331e6c0
flags: 0xfff00000000000()
raw: 00fff00000000000 0000000000000000 ffff8880a331e6c0 00000000ffffffff
raw: dead000000000100 dead000000000200 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a331ee00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880a331ee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880a331ef00: 00 00 f1 f1 f1 f1 00 00 00 f2 00 00 00 f2 f2 f2
                                                          ^
 ffff8880a331ef80: 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00
 ffff8880a331f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================