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From 60ef8af4bc2d5f8643adbcb69bb1f52e491a96ae Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Mon, 27 Jan 2020 10:22:44 +0000
Subject: [PATCH] drm: Checking of the pitch is only valid for linear
formats
framebuffer_check was computing a minimum pitch value and ensuring
that the provided value was greater than this.
That check is only valid if the format is linear.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/gpu/drm/drm_framebuffer.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -217,12 +217,16 @@ static int framebuffer_check(struct drm_
if (min_pitch > UINT_MAX)
return -ERANGE;
- if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
- return -ERANGE;
+ if (r->modifier[i] == DRM_FORMAT_MOD_LINEAR) {
+ if ((uint64_t)height * r->pitches[i] + r->offsets[i] >
+ UINT_MAX)
+ return -ERANGE;
- if (block_size && r->pitches[i] < min_pitch) {
- DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
- return -EINVAL;
+ if (block_size && r->pitches[i] < min_pitch) {
+ DRM_DEBUG_KMS("bad pitch %u for plane %d\n",
+ r->pitches[i], i);
+ return -EINVAL;
+ }
}
if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
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