==================================================================
BUG: KASAN: use-after-free in memset include/linux/string.h:329 [inline]
BUG: KASAN: use-after-free in __ext4_expand_extra_isize.isra.0+0x10b/0x1c0 fs/ext4/inode.c:5787
Write of size 57987 at addr ffff8881b5cd63a0 by task syz-executor.1/11521

CPU: 1 PID: 11521 Comm: syz-executor.1 Not tainted 4.14.98+ #7
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 print_address_description+0x60/0x226 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0x88/0x2a5 mm/kasan/report.c:393

The buggy address belongs to the page:
page:ffffea0006d73580 count:2 mapcount:0 mapping:ffff8881d9ea8950 index:0x458
flags: 0x4000000000001074(referenced|dirty|lru|active|private)
raw: 4000000000001074 ffff8881d9ea8950 0000000000000458 00000002ffffffff
raw: ffffea0006772520 ffffea0006c0a2e0 ffff88819c6d2348 ffff8881da81aa80
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8881da81aa80

Memory state around the buggy address:
 ffff8881b5cd6f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881b5cd6f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881b5cd7000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8881b5cd7080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881b5cd7100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs error (device sda1): ext4_xattr_set_entry:1604: inode #16486: comm syz-executor.0: corrupted xattr entries
EXT4-fs error (device sda1): ext4_xattr_set_entry:1604: inode #16492: comm syz-executor.3: corrupted xattr entries