#syz test:
https://android.googlesource.com/kernel/common android12-5.10-lts
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 38531c5e16c6..6562fad27dde 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1583,6 +1583,11 @@ static int ext4_xattr_set_entry(struct ext4_xattr_info *i,
/* Compute min_offs and last. */
last = s->first;
+ if (!last) {
+ ret = -EFSCORRUPTED;
+ goto out;
+ }
+
for (; !IS_LAST_ENTRY(last); last = next) {
next = EXT4_XATTR_NEXT(last);
if ((void *)next >= s->end) {
--
2.37.3