WARNING: can't dereference registers at 0000000035a25a73 for ip apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
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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 ffff88819c277d20 by task syz-executor.4/2977

CPU: 1 PID: 2977 Comm: syz-executor.4 Not tainted 4.14.148+ #0
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
 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:6148
 __perf_event_output kernel/events/core.c:6264 [inline]
 perf_event_output_forward+0xdc/0x220 kernel/events/core.c:6282
 __perf_event_overflow+0x12d/0x340 kernel/events/core.c:7520
 perf_swevent_overflow+0x7a/0xf0 kernel/events/core.c:7596
 perf_swevent_event+0x112/0x270 kernel/events/core.c:7634
 perf_tp_event+0x633/0x7f0 kernel/events/core.c:8058
 perf_trace_run_bpf_submit kernel/events/core.c:8028 [inline]
 perf_trace_run_bpf_submit+0x113/0x170 kernel/events/core.c:8014
 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
 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline]
 read_seqcount_begin include/linux/seqlock.h:164 [inline]
 ktime_get_ts64+0x7d/0x290 kernel/time/timekeeping.c:873
 do_clock_gettime+0x46/0xd0 kernel/time/posix-stubs.c:71
 SYSC_clock_gettime kernel/time/posix-stubs.c:88 [inline]
 SyS_clock_gettime+0x6b/0xe0 kernel/time/posix-stubs.c:82
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c89a
RSP: 002b:00007face5a36c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 000000000075bf28 RCX: 000000000045c89a
RDX: 00000000004c89d7 RSI: 00007face5a36c60 RDI: 0000000000000001
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000000a R11: 0000000000000246 R12: 000000000075bf2c
R13: 00000000004c0113 R14: 00000000004d2460 R15: 000000000075bf2c

The buggy address belongs to the page:
page:ffffea0006709dc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
raw: 4000000000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: ffffea0006709de0 ffffea0006709de0 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88819c277c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88819c277c80: 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1
>ffff88819c277d00: f1 04 f2 00 f3 f3 f3 00 00 00 00 00 00 00 00 00
                               ^
 ffff88819c277d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88819c277e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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