From: Dan Carpenter <error27@gmail.com>
To: David Airlie <airlied@linux.ie>
Cc: Dave Airlie <airlied@redhat.com>,
kernel-janitors@vger.kernel.org,
Thomas Hellstrom <thellstrom@vmware.com>,
dri-devel@lists.freedesktop.org
Subject: [patch] vmwgfx: return -EFAULT if copy_to_user fails
Date: Sat, 10 Jul 2010 14:30:04 +0000 [thread overview]
Message-ID: <20100710143003.GZ19184@bicker> (raw)
copy_to_user() returns the number of bytes remaining to be copied, but
we want to return a negative error code. This gets copied to user
space.
Signed-off-by: Dan Carpenter <error27@gmail.com>
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index f1d6261..437ac78 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -972,6 +972,7 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
ret = copy_from_user(rects, user_rects, rects_size);
if (unlikely(ret != 0)) {
DRM_ERROR("Failed to get rects.\n");
+ ret = -EFAULT;
goto out_free;
}
reply other threads:[~2010-07-10 14:30 UTC|newest]
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