From: Jens Axboe <axboe@fb.com>
Date: Fri, 11 Apr 2014 17:34:17 +0000 (-0600)
Subject: Ensure that fread() string is always NULL terminated
X-Git-Tag: fio-2.1.9~70
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=e0c8b741108cd59ce4435082b5afd5c69a6f713e

Ensure that fread() string is always NULL terminated

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/backend.c b/backend.c
index 5ac36592..b05e5437 100644
--- a/backend.c
+++ b/backend.c
@@ -1110,7 +1110,8 @@ static int switch_ioscheduler(struct thread_data *td)
 	/*
 	 * Read back and check that the selected scheduler is now the default.
 	 */
-	ret = fread(tmp, 1, sizeof(tmp), f);
+	memset(tmp, 0, sizeof(tmp));
+	ret = fread(tmp, 1, sizeof(tmp) - 1, f);
 	if (ferror(f) || ret < 0) {
 		td_verror(td, errno, "fread");
 		fclose(f);