harec

commit 7efa977077c8e24c81d5b9a0e384ccfc7efd4d25
parent 4cb92f7db22e32384494488e1d63a3c2a841843a
Author: Alexey Yerin <yyp@disroot.org>
Date:   Mon, 21 Feb 2022 21:15:19 +0300

lex: allocate space for a NUL byte

This causes an out-of-bounds read, and thus libhart build failures on
FreeBSD (not sure why it doesn't happen on Linux).

Signed-off-by: Alexey Yerin <yyp@disroot.org>

Diffstat:
M
src/lex.c
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/lex.c b/src/lex.c
@@ -553,7 +553,7 @@ lex_string(struct lexer *lexer, struct token *out)
 		delim = c;
 		while ((c = next(lexer, NULL, false)) != UTF8_INVALID) {
 			if (c == delim) {
-				char *buf = xcalloc(lexer->buflen, 1);
+				char *buf = xcalloc(lexer->buflen + 1, 1);
 				memcpy(buf, lexer->buf, lexer->buflen);
 				out->token = T_LITERAL;
 				out->storage = STORAGE_STRING;