linux-kernel - [PATCH] drm/tilcdc: fix wrong error handling

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-next>] [day] [month] [year] [list]

Date:   Fri, 23 Sep 2016 12:52:49 +0200
From:   Daniel Schultz <d.schultz@...tec.de>
To:     jsarha@...com, dri-devel@...ts.freedesktop.org
Cc:     tomi.valkeinen@...com, airlied@...ux.ie,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/tilcdc: fix wrong error handling

When 'component_bind_all' fails it should not try to unbind components
in the error handling. This will produce a null pointer kernel panic when
no component exist.

This patch changes the order of the error handling. Now, it will only
unbind components if the are bound. Otherwise, the module will jump to
an error label below.

Signed-off-by: Daniel Schultz <d.schultz@...tec.de>
---
 drivers/gpu/drm/tilcdc/tilcdc_drv.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index d278093..d491610 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -315,13 +315,13 @@ fail_irq_uninstall:
 fail_vblank_cleanup:
 	drm_vblank_cleanup(dev);
 
-fail_mode_config_cleanup:
-	drm_mode_config_cleanup(dev);
-
 fail_component_cleanup:
 	if (priv->is_componentized)
 		component_unbind_all(dev->dev, dev);
 
+fail_mode_config_cleanup:
+	drm_mode_config_cleanup(dev);
+
 fail_external_cleanup:
 	tilcdc_remove_external_encoders(dev);
 
-- 
1.9.1