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-rw-r--r--fs/fat/fat.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index e0c076763f5..ac8913e7192 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -821,6 +821,9 @@ static dir_entry *extract_vfat_name(fat_itr *itr)
slot2str((dir_slot *)dent, buf, &idx);
+ if (n + idx >= sizeof(itr->l_name))
+ return NULL;
+
/* shift accumulated long-name up and copy new part in: */
memmove(itr->l_name + idx, itr->l_name, n);
memcpy(itr->l_name, buf, idx);