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, Liviu Dudau <liviu.dudau@arm.com> Subject: [PATCH] drm/plane: Move range check for format_count earlier Date: Fri, 3 Dec 2021 10:28:15 +0000 [thread overview] Message-ID: <20211203102815.38624-1-steven.price@arm.com> (raw) While the check for format_count > 64 in __drm_universal_plane_init() shouldn't be hit (it's a WARN_ON), in its current position it will then leak the plane->format_types array and fail to call drm_mode_object_unregister() leaking the modeset identifier. Move it to the start of the function to avoid allocating those resources in the first place. Signed-off-by: Steven Price <steven.price@arm.com> --- drivers/gpu/drm/drm_plane.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index 82afb854141b..fd0bf90fb4c2 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -249,6 +249,13 @@ static int __drm_universal_plane_init(struct drm_device *dev, if (WARN_ON(config->num_total_plane >= 32)) return -EINVAL; + /* + * First driver to need more than 64 formats needs to fix this. Each + * format is encoded as a bit and the current code only supports a u64. + */ + if (WARN_ON(format_count > 64)) + return -EINVAL; + WARN_ON(drm_drv_uses_atomic_modeset(dev) && (!funcs->atomic_destroy_state || !funcs->atomic_duplicate_state)); @@ -270,13 +277,6 @@ static int __drm_universal_plane_init(struct drm_device *dev, return -ENOMEM; } - /* - * First driver to need more than 64 formats needs to fix this. Each - * format is encoded as a bit and the current code only supports a u64. - */ - if (WARN_ON(format_count > 64)) - return -EINVAL; - if (format_modifiers) { const uint64_t *temp_modifiers = format_modifiers; -- 2.25.1
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: Liviu Dudau <liviu.dudau@arm.com>, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Steven Price <steven.price@arm.com> Subject: [PATCH] drm/plane: Move range check for format_count earlier Date: Fri, 3 Dec 2021 10:28:15 +0000 [thread overview] Message-ID: <20211203102815.38624-1-steven.price@arm.com> (raw) While the check for format_count > 64 in __drm_universal_plane_init() shouldn't be hit (it's a WARN_ON), in its current position it will then leak the plane->format_types array and fail to call drm_mode_object_unregister() leaking the modeset identifier. Move it to the start of the function to avoid allocating those resources in the first place. Signed-off-by: Steven Price <steven.price@arm.com> --- drivers/gpu/drm/drm_plane.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index 82afb854141b..fd0bf90fb4c2 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -249,6 +249,13 @@ static int __drm_universal_plane_init(struct drm_device *dev, if (WARN_ON(config->num_total_plane >= 32)) return -EINVAL; + /* + * First driver to need more than 64 formats needs to fix this. Each + * format is encoded as a bit and the current code only supports a u64. + */ + if (WARN_ON(format_count > 64)) + return -EINVAL; + WARN_ON(drm_drv_uses_atomic_modeset(dev) && (!funcs->atomic_destroy_state || !funcs->atomic_duplicate_state)); @@ -270,13 +277,6 @@ static int __drm_universal_plane_init(struct drm_device *dev, return -ENOMEM; } - /* - * First driver to need more than 64 formats needs to fix this. Each - * format is encoded as a bit and the current code only supports a u64. - */ - if (WARN_ON(format_count > 64)) - return -EINVAL; - if (format_modifiers) { const uint64_t *temp_modifiers = format_modifiers; -- 2.25.1
next reply other threads:[~2021-12-03 10:28 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-12-03 10:28 Steven Price [this message] 2021-12-03 10:28 ` [PATCH] drm/plane: Move range check for format_count earlier Steven Price 2021-12-03 13:08 ` Liviu Dudau 2021-12-03 13:08 ` Liviu Dudau 2021-12-03 16:33 ` Carsten Haitzler 2022-04-28 11:57 ` Steven Price 2022-04-28 11:57 ` Steven Price 2022-04-28 15:00 ` Liviu Dudau 2022-04-28 15:00 ` Liviu Dudau
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