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BUG: KASAN: stack-out-of-bounds in finish_writeback_work.isra.53+0xcc/0xd0 fs/fs-writeback.c:168
Read of size 8 at addr ffff88808bd07b98 by task kworker/u4:0/7

CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.3.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x113/0x167 lib/dump_stack.c:113
 print_address_description.cold.8+0x9/0x318 mm/kasan/report.c:351
 __kasan_report.cold.9+0x1b/0x3f mm/kasan/report.c:482
 kasan_report+0x12/0x17 mm/kasan/common.c:618
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132
 finish_writeback_work.isra.53+0xcc/0xd0 fs/fs-writeback.c:168
 wb_do_writeback fs/fs-writeback.c:2030 [inline]
 wb_workfn+0x358/0xfa0 fs/fs-writeback.c:2070
 process_one_work+0x856/0x1630 kernel/workqueue.c:2269
 worker_thread+0x85/0xb60 kernel/workqueue.c:2415
 kthread+0x331/0x3f0 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the page:
page:ffffea00022f41c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0xfffe0000000000()
raw: 00fffe0000000000 0000000000000000 ffffffff022f0101 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808bd07a80: f1 00 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00
 ffff88808bd07b00: 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00
>ffff88808bd07b80: f2 f2 f2 f2 f2 f2 00 00 f2 f2 f2 f2 f2 f2 00 00
                            ^
 ffff88808bd07c00: 00 00 00 00 00 00 f3 f3 f3 f3 00 00 00 00 00 00
 ffff88808bd07c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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