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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 ffff88819d037a28 by task syz-executor.4/16094

CPU: 1 PID: 16094 Comm: syz-executor.4 Not tainted 4.14.157-syzkaller #0
Call Trace:
 __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 include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152
 alloc_object lib/debugobjects.c:150 [inline]
 __debug_object_init+0x1d2/0x7d0 lib/debugobjects.c:349
 __init_work+0x3f/0x50 kernel/workqueue.c:506
 call_usermodehelper_setup+0x93/0x2e0 kernel/umh.c:378
 call_modprobe kernel/kmod.c:94 [inline]
 __request_module+0x3b7/0x9e2 kernel/kmod.c:171
 __sock_create+0x454/0x620 net/socket.c:1256
 sock_create net/socket.c:1315 [inline]
 SYSC_socket net/socket.c:1345 [inline]
 SyS_socket+0xe1/0x1e0 net/socket.c:1325
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a679
RSP: 002b:00007f0048008c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f00480096d4
R13: 00000000004ca2d0 R14: 00000000004e30e8 R15: 00000000ffffffff

The buggy address belongs to the page:
page:ffffea0006740dc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
raw: 4000000000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 dead000000000200 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88819d037900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88819d037980: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
>ffff88819d037a00: f1 f1 04 f2 00 f3 f3 f3 00 00 00 00 00 00 00 00
                                  ^
 ffff88819d037a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88819d037b00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3
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