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BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x169f/0x1810 arch/x86/kernel/unwind_orc.c:470
Read of size 8 at addr ffff8881dba07c40 by task syz-executor.4/15219

CPU: 0 PID: 15219 Comm: syz-executor.4 Not tainted 4.14.156-syzkaller #0
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xe5/0x154 lib/dump_stack.c:58
 print_address_description+0x60/0x226 mm/kasan/report.c:187
 __kasan_report.cold+0x1a/0x41 mm/kasan/report.c:316
 unwind_next_frame+0x169f/0x1810 arch/x86/kernel/unwind_orc.c:470
 perf_callchain_kernel+0x3a0/0x540 arch/x86/events/core.c:2338
 get_perf_callchain+0x2f5/0x770 kernel/events/callchain.c:217
 perf_callchain+0x147/0x190 kernel/events/callchain.c:190
 perf_prepare_sample+0x6a8/0x1360 kernel/events/core.c:6149
 __perf_event_output kernel/events/core.c:6265 [inline]
 perf_event_output_forward+0xdc/0x220 kernel/events/core.c:6283
 __perf_event_overflow+0x12d/0x340 kernel/events/core.c:7541
 perf_swevent_overflow+0x7a/0xf0 kernel/events/core.c:7617
 perf_swevent_event+0x19c/0x270 kernel/events/core.c:7650
 perf_tp_event+0x633/0x7f0 kernel/events/core.c:8079
 perf_trace_run_bpf_submit kernel/events/core.c:8049 [inline]
 perf_trace_run_bpf_submit+0x113/0x170 kernel/events/core.c:8035
 perf_trace_lock_acquire+0x341/0x4e0 include/trace/events/lock.h:13
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x279/0x360 kernel/locking/lockdep.c:3993
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x42/0x60 kernel/locking/spinlock.c:160
 debug_object_active_state lib/debugobjects.c:687 [inline]
 debug_object_active_state+0x109/0x380 lib/debugobjects.c:675
 debug_rcu_head_unqueue kernel/rcu/rcu.h:161 [inline]
 rcu_do_batch kernel/rcu/tree.c:2698 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
 rcu_process_callbacks+0x64f/0xf60 kernel/rcu/tree.c:2946
 __do_softirq+0x234/0x9ec kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x114/0x150 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x2b/0x50 kernel/locking/spinlock.c:200
RSP: 0018:ffff8881aa02fb88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000007 RBX: 00000000000004c0 RCX: 1ffff110353c110f
RDX: 0000000000000000 RSI: ffff8881a9e08858 RDI: ffff8881a9e0882c
RBP: fffffffface27a00 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: fffffffface26f38 R14: ffff8881da95d200 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:367 [inline]
 isolate_lru_page+0x5de/0x8b0 mm/vmscan.c:1655
 mlock_vma_page+0x17c/0x230 mm/mlock.c:94
 follow_page_pte mm/gup.c:200 [inline]
 follow_pmd_mask mm/gup.c:258 [inline]
 follow_pud_mask mm/gup.c:345 [inline]
 follow_p4d_mask.isra.0+0xabe/0xfe0 mm/gup.c:371
 follow_page_mask mm/gup.c:424 [inline]
 __get_user_pages+0x2b2/0xe80 mm/gup.c:713
 populate_vma_page_range+0x188/0x220 mm/gup.c:1235
 __mm_populate+0x1a5/0x2e0 mm/gup.c:1283
 mm_populate include/linux/mm.h:2224 [inline]
 vm_mmap_pgoff+0x1ab/0x1c0 mm/util.c:338
 SYSC_mmap_pgoff mm/mmap.c:1564 [inline]
 SyS_mmap_pgoff+0x146/0x1b0 mm/mmap.c:1520
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a679
RSP: 002b:00007fddb52f8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045a679
RDX: 0000000002000007 RSI: 0000000000600000 RDI: 00000000209fd000
RBP: 000000000075bf20 R08: ffffffffffffffff R09: 0000000012a1b000
R10: 0000000004006031 R11: 0000000000000246 R12: 00007fddb52f96d4
R13: 00000000004c70fe R14: 00000000004dd128 R15: 00000000ffffffff

The buggy address belongs to the page:
page:ffffea00076e81c0 count:1 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000001000(reserved)
raw: 4000000000001000 0000000000000000 0000000000000000 00000001ffffffff
raw: ffffea00076e81e0 ffffea00076e81e0 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881dba07b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881dba07b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1
>ffff8881dba07c00: f1 f1 f1 f1 f1 04 f2 00 f3 f3 f3 00 00 00 00 00
                                           ^
 ffff8881dba07c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881dba07d00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
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