From: Daiki Ueno <ueno@gnu.org>
Date: Wed, 23 Jul 2025 04:55:17 +0000 (+0900)
Subject: cfg: avoid UB on FILE stream marked as error
X-Git-Tag: 3.8.11~30^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fc5aeb7f74cdd58910493dcf4e75cb3c51a2451e;p=thirdparty%2Fgnutls.git

cfg: avoid UB on FILE stream marked as error

Spotted by clang-analyzer 19.

Signed-off-by: Daiki Ueno <ueno@gnu.org>
---

diff --git a/src/cfg.c b/src/cfg.c
index 705f912555..9a9627f180 100644
--- a/src/cfg.c
+++ b/src/cfg.c
@@ -104,8 +104,10 @@ static int parser_getc(struct parser_st *parser)
 	if (parser->pushback_length > 0) {
 		return parser->pushback[--parser->pushback_length];
 	}
-	int c = getc(parser->fp);
-	return c;
+	if (feof(parser->fp) || ferror(parser->fp)) {
+		return EOF;
+	}
+	return getc(parser->fp);
 }
 
 static void parser_ungetc(struct parser_st *parser, int c)