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BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x1440/0x18a0 arch/x86/kernel/unwind_orc.c:522
Read of size 8 at addr ffff8880936a7808 by task syz-executor.3/23619

CPU: 0 PID: 23619 Comm: syz-executor.3 Not tainted 4.19.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 print_address_description.cold+0x7c/0x212 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x88/0x2b9 mm/kasan/report.c:396
 unwind_next_frame+0x1440/0x18a0 arch/x86/kernel/unwind_orc.c:522
 perf_callchain_kernel+0x402/0x5c0 arch/x86/events/core.c:2346
 get_perf_callchain+0x390/0x860 kernel/events/callchain.c:202
 perf_callchain+0x165/0x1c0 kernel/events/core.c:6440
 perf_prepare_sample+0x80a/0x1570 kernel/events/core.c:6467
 __perf_event_output kernel/events/core.c:6582 [inline]
 perf_event_output_forward+0xf3/0x270 kernel/events/core.c:6600
 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:7866
 perf_swevent_overflow+0xac/0x150 kernel/events/core.c:7942
 perf_swevent_event+0x14d/0x2e0 kernel/events/core.c:7980
 perf_tp_event+0x29f/0x850 kernel/events/core.c:8398
 perf_trace_run_bpf_submit+0x136/0x190 kernel/events/core.c:8372
 perf_trace_lock_acquire+0x362/0x530 include/trace/events/lock.h:13
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x2a0/0x400 kernel/locking/lockdep.c:3902
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
 rq_lock kernel/sched/sched.h:1817 [inline]
 __schedule+0x1f8/0x1d80 kernel/sched/core.c:3453
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue_me+0x2fc/0x5e0 kernel/futex.c:2610
 futex_wait+0x1ec/0x590 kernel/futex.c:2725
 do_futex+0x15d/0x1b20 kernel/futex.c:3692
 __do_sys_futex kernel/futex.c:3753 [inline]
 __se_sys_futex kernel/futex.c:3721 [inline]
 __x64_sys_futex+0x37c/0x4f0 kernel/futex.c:3721
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c449
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffe20e2c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000000003e8 RCX: 000000000045c449
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000076bf2c
RBP: 000000000000002d R08: 00ffffffffffffff R09: 00ffffffffffffff
R10: 00007ffe20e2c110 R11: 0000000000000246 R12: 000000000076bf20
R13: 000000000007bb65 R14: 000000000007bb92 R15: 000000000076bf2c

The buggy address belongs to the page:
page:ffffea00024da9c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0xfffe0000000000()
raw: 00fffe0000000000 0000000000000000 dead000000000200 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880936a7700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880936a7780: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2
>ffff8880936a7800: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
                      ^
 ffff8880936a7880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880936a7900: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3
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