There is an integer overflow when we round up to PAGE_SIZE, but it's
harmless because we never re-use "request->size" for anything meaningful.
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
This code predates git.
drivers/gpu/drm/drm_scatter.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/drm_scatter.c b/drivers/gpu/drm/drm_scatter.c
index d5c386154246..ca520028b2cb 100644
--- a/drivers/gpu/drm/drm_scatter.c
+++ b/drivers/gpu/drm/drm_scatter.c
@@ -99,6 +99,9 @@ int drm_legacy_sg_alloc(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_SG))
return -EOPNOTSUPP;
+ if (request->size > SIZE_MAX - PAGE_SIZE)
+ return -EINVAL;
+
if (dev->sg)
return -EINVAL;
--
2.11.0
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