linux-kernel - [PATCH 4.4 31/36] drm/atomic: fix an error code in mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 13 Mar 2017 16:39:31 +0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>
Subject: [PATCH 4.4 31/36] drm/atomic: fix an error code in mode_fixup()

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit f9ad86e42d0303eeb8e0d41bb208153022ebd9d2 upstream.

Having "ret" be a bool type works for everything except
ret = funcs->atomic_check().  The other functions all return zero on
error but ->atomic_check() returns negative error codes.  We want to
propagate the error code but instead we return 1.

I found this bug with static analysis and I don't know if it affects
run time.

Fixes: 4cd4df8080a3 ("drm/atomic: Add ->atomic_check() to encoder helpers")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207234601.GA23981@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/drm_atomic_helper.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -265,7 +265,7 @@ mode_fixup(struct drm_atomic_state *stat
 	struct drm_connector *connector;
 	struct drm_connector_state *conn_state;
 	int i;
-	bool ret;
+	int ret;
 
 	for_each_crtc_in_state(state, crtc, crtc_state, i) {
 		if (!crtc_state->mode_changed &&