[PATCH v7 10/15] tools/bootconfig: fix fd leak in load_xbc_file() on fstat failure

[Josh Law <objecting@objecting.org>]

If fstat() fails after open() succeeds, the function returns without
closing the file descriptor. Also preserve errno across close(), since
close() may overwrite it before the error is returned.

Fixes: 950313ebf79c ("tools: bootconfig: Add bootconfig command")
Signed-off-by: Josh Law <objecting@objecting.org>
---
 tools/bootconfig/main.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/bootconfig/main.c b/tools/bootconfig/main.c
index 55d59ed507d5..643f707b8f1d 100644
--- a/tools/bootconfig/main.c
+++ b/tools/bootconfig/main.c
@@ -162,8 +162,11 @@ static int load_xbc_file(const char *path, char **buf)
 	if (fd < 0)
 		return -errno;
 	ret = fstat(fd, &stat);
-	if (ret < 0)
-		return -errno;
+	if (ret < 0) {
+		ret = -errno;
+		close(fd);
+		return ret;
+	}
 
 	ret = load_xbc_fd(fd, buf, stat.st_size);
 
-- 
2.34.1