From: Steven Price <steven.price@arm.com> To: Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Maxime Ripard <mripard@kernel.org>, Thomas Zimmermann <tzimmermann@suse.de> Cc: Steven Price <steven.price@arm.com>, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Biju Das <biju.das.jz@bp.renesas.com>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Pavel Machek <pavel@denx.de> Subject: [PATCH v2] drm/of: free the iterator object on failure Date: Wed, 14 Jul 2021 15:33:00 +0100 [thread overview] Message-ID: <20210714143300.20632-1-steven.price@arm.com> (raw) In-Reply-To: <20210712155758.48286-1-steven.price@arm.com> When bailing out due to the sanity check the iterator value needs to be freed because the early return prevents for_each_child_of_node() from doing the dereference itself. Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order") Signed-off-by: Steven Price <steven.price@arm.com> --- drivers/gpu/drm/drm_of.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) v2: Fixes now refers to the original commit as suggested by Laurent, rather than 4ee48cc5586b ("drm: of: Fix double-free bug") which only fixed part of the problem. Note that 4ee48cc5586b is a dependency for this patch to cleanly apply. diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 197c57477344..997b8827fed2 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -331,8 +331,10 @@ static int drm_of_lvds_get_remote_pixels_type( * configurations by passing the endpoints explicitly to * drm_of_lvds_get_dual_link_pixel_order(). */ - if (!current_pt || pixels_type != current_pt) + if (!current_pt || pixels_type != current_pt) { + of_node_put(endpoint); return -EINVAL; + } } return pixels_type; -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Steven Price <steven.price@arm.com> To: Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Maxime Ripard <mripard@kernel.org>, Thomas Zimmermann <tzimmermann@suse.de> Cc: Pavel Machek <pavel@denx.de>, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Steven Price <steven.price@arm.com>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Biju Das <biju.das.jz@bp.renesas.com> Subject: [PATCH v2] drm/of: free the iterator object on failure Date: Wed, 14 Jul 2021 15:33:00 +0100 [thread overview] Message-ID: <20210714143300.20632-1-steven.price@arm.com> (raw) In-Reply-To: <20210712155758.48286-1-steven.price@arm.com> When bailing out due to the sanity check the iterator value needs to be freed because the early return prevents for_each_child_of_node() from doing the dereference itself. Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order") Signed-off-by: Steven Price <steven.price@arm.com> --- drivers/gpu/drm/drm_of.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) v2: Fixes now refers to the original commit as suggested by Laurent, rather than 4ee48cc5586b ("drm: of: Fix double-free bug") which only fixed part of the problem. Note that 4ee48cc5586b is a dependency for this patch to cleanly apply. diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 197c57477344..997b8827fed2 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -331,8 +331,10 @@ static int drm_of_lvds_get_remote_pixels_type( * configurations by passing the endpoints explicitly to * drm_of_lvds_get_dual_link_pixel_order(). */ - if (!current_pt || pixels_type != current_pt) + if (!current_pt || pixels_type != current_pt) { + of_node_put(endpoint); return -EINVAL; + } } return pixels_type; -- 2.20.1
next prev parent reply other threads:[~2021-07-14 14:33 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-07-12 15:57 [PATCH] drm/of: free the iterator object on failure Steven Price 2021-07-12 15:57 ` Steven Price 2021-07-12 16:03 ` Biju Das 2021-07-12 16:03 ` Biju Das 2021-07-12 16:50 ` Laurent Pinchart 2021-07-12 16:50 ` Laurent Pinchart 2021-07-12 21:31 ` Steven Price 2021-07-12 21:31 ` Steven Price 2021-07-12 21:55 ` Laurent Pinchart 2021-07-12 21:55 ` Laurent Pinchart 2021-07-13 16:16 ` Steven Price 2021-07-13 16:16 ` Steven Price 2021-07-14 8:35 ` Laurent Pinchart 2021-07-14 8:35 ` Laurent Pinchart 2021-07-14 14:33 ` Steven Price [this message] 2021-07-14 14:33 ` [PATCH v2] " Steven Price 2021-07-14 15:26 ` Laurent Pinchart 2021-07-14 15:26 ` Laurent Pinchart 2021-07-15 10:32 ` Steven Price 2021-07-15 10:32 ` Steven Price
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