base: util: check provided buffer len fits ssize_t in sid_util_fd_rea…

…d_all
sid-project · Jun 24, 2024 · f9cbd99 · f9cbd99
1 parent 323245c
commit f9cbd99
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/base/util.c b/src/base/util.c
@@ -21,6 +21,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <limits.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -59,6 +60,9 @@ ssize_t sid_util_fd_read_all(int fd, void *buf, size_t len)
 {
 	ssize_t n, total = 0;
 
+	if (len > SSIZE_MAX)
+		return -ERANGE;
+
 	while (len) {
 		n = read(fd, buf, len);
 		if (n < 0) {