From: Nathaniel <me@nathanielbennett.com>
Date: Tue, 8 Jun 2021 06:43:29 -0400
Subject: Sanity check for sprintf
Origin: https://github.com/shevek/libspf2/commit/28faf4624a6a371b11afdb9820078d3b0ee3803d

---
 src/libspf2/spf_expand.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/libspf2/spf_expand.c b/src/libspf2/spf_expand.c
index e7f5a26f3e1b..25689da11e84 100644
--- a/src/libspf2/spf_expand.c
+++ b/src/libspf2/spf_expand.c
@@ -398,10 +398,7 @@ top:
 						break;
 
 					default:
-						/* No point doing snprintf with a const '4'
-						 * because we know we're going to get 4
-						 * characters anyway. */
-						sprintf( p_write, "%%%02x", *p_read );
+						snprintf( p_write, 4, "%%%02x", (unsigned char) *p_read );
 						p_write += 3;
 						p_read++;
 						break;
-- 
2.20.1