modprobe: only parse files that end in .conf

This matches behavior with kmod which has been the standard for a long
time at this point.

URL: https://bugs.busybox.net/8021
Reported-by: Jö <jorrit@jorrit.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index ec490b74d..997ee3c67 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -220,8 +220,16 @@ static int FAST_FUNC config_file_action(const char *filename,
         parser_t *p;
         struct module_entry *m;
         int rc = TRUE;
+        const char *base, *ext;
 
-        if (bb_basename(filename)[0] == '.')
+        /* Skip files that begin with a ".". */
+        base = bb_basename(filename);
+        if (base[0] == '.')
+                goto error;
+
+        /* Skip files that do not end with a ".conf". */
+        ext = strrchr(base, '.');
+        if (ext == NULL || strcmp(ext + 1, "conf"))
                 goto error;
 
         p = config_open2(filename, fopen_for_read);