crypto: sanitize argument for format string

The template lookup interface does not provide a way to use format
strings, so make sure that the interface cannot be abused accidentally.

Signed-off-by: Kees Cook <[email protected]>
Cc: Herbert Xu <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/crypto/algapi.c b/crypto/algapi.c
index 6149a6e09643f0c9b975ac339dd904dd58421262..7a1ae87f1683459711c0b0c6badd1d76ddd9c9f1 100644 (file)
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -495,7 +495,8 @@ static struct crypto_template *__crypto_lookup_template(const char *name)
 
 struct crypto_template *crypto_lookup_template(const char *name)
 {
-       return try_then_request_module(__crypto_lookup_template(name), name);
+       return try_then_request_module(__crypto_lookup_template(name), "%s",
+                                      name);
 }
 EXPORT_SYMBOL_GPL(crypto_lookup_template);