1 files changed, 2 insertions, 2 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index 265e0ce9769c..ca02c13a84aa 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2833,9 +2833,9 @@ static int prepend_name(char **buffer, int *buflen, struct qstr *name)
         u32 dlen = ACCESS_ONCE(name->len);
         char *p;
 
-        if (*buflen < dlen + 1)
-                return -ENAMETOOLONG;
         *buflen -= dlen + 1;
+        if (*buflen < 0)
+                return -ENAMETOOLONG;
         p = *buffer -= dlen + 1;
         *p++ = '/';
         while (dlen--) {