From: Collin Funk <collin.funk1@gmail.com>
Date: Wed, 31 Dec 2025 18:11:47 +0000 (+0100)
Subject: msgfmt: Don't overflow the stack with large values for --alignment.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=969c02603826f16a0223820fbdc379bc25d93b2e;p=thirdparty%2Fgettext.git

msgfmt: Don't overflow the stack with large values for --alignment.

Reported by <maxtodeath@gmail.com> at <https://savannah.gnu.org/bugs/?67743>.

* gettext-tools/src/write-mo.c (write_table): Use xmalloca instead of
alloca to allocate the buffer to fill with NUL bytes.
---

diff --git a/gettext-tools/src/write-mo.c b/gettext-tools/src/write-mo.c
index 07f08d30e..e3b81fef4 100644
--- a/gettext-tools/src/write-mo.c
+++ b/gettext-tools/src/write-mo.c
@@ -1010,7 +1010,7 @@ write_table (FILE *output_file, message_list_ty *mlp)
   offset = end_offset;
 
   /* A few zero bytes for padding.  */
-  char *null = (char *) alloca (alignment);
+  char *null = (char *) xmalloca (alignment);
   memset (null, '\0', alignment);
 
   /* Now write the original strings.  */