[PATCH] expand: Fix off-by-one bug in expmeta

On Fri, Sep 26, 2025 at 04:15:15PM +0000, Reilly Brogan wrote:
>
> ../configure: 9961: .: cannot open ../gcc/cp/config-lang.in���M�U: No such
> file
> ```

This was caused by the failure to include the terminating NUL
character when expanding path names.

---8<---
Ensure the terminating NUL character is included when expanding
path names.

Reported-by: Reilly Brogan <[email protected]>
Fixes: a9012f4078be ("expand: Process multi-byte characters in expmeta")
Signed-off-by: Herbert Xu <[email protected]>

diff --git a/src/expand.c b/src/expand.c
index 1fab394..912384d 100644
--- a/src/expand.c
+++ b/src/expand.c
@@ -1686,7 +1686,7 @@ static char *expmeta(char *name, unsigned name_len, size_t expdir_len)
 			goto out_opendir;
 		enddir = expmeta_rmescapes(enddir, name);
 		if (lstat64(cp, &statb) >= 0)
-			cp = addfnamealt(enddir, expdir_len);
+			cp = addfnamealt(enddir + 1, expdir_len);
 		goto out_opendir;
 	}
 	start = memrchr(name, '/', p - name);
-- 
Email: Herbert Xu <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt