EXT4-fs error (device sda1): ext4_xattr_set_entry:1583: inode #15981: comm syz-fuzzer: corrupted xattr entries
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BUG: KASAN: use-after-free in ext4_xattr_set_entry+0x1863/0x3830 fs/ext4/xattr.c:1714
Read of size 4 at addr ffff888039437ffe by task syz-fuzzer/7011

CPU: 1 PID: 7011 Comm: syz-fuzzer Not tainted 5.7.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1e9/0x30e lib/dump_stack.c:118
 print_address_description+0x74/0x5c0 mm/kasan/report.c:382
 __kasan_report+0x103/0x1a0 mm/kasan/report.c:511
 kasan_report+0x4d/0x80 mm/kasan/common.c:625

The buggy address belongs to the page:
page:ffffea0000e50dc0 refcount:2 mapcount:0 mapping:00000000964a8bf7 index:0x421
def_blk_aops
flags: 0xfffe000000203a(referenced|dirty|lru|active|private)
raw: 00fffe000000203a ffffea00022bab48 ffffea0000e55cc8 ffff88821804eb60
raw: 0000000000000421 ffff888039f180e8 00000002ffffffff ffff88821bb96000
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff88821bb96000

Memory state around the buggy address:
 ffff888039437f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888039437f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888039438000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888039438080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888039438100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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