Commit 18097b91 authored by Dave Airlie's avatar Dave Airlie

drm/qxl: add missing access check for execbuffer ioctl

Reported-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 426729dc
......@@ -171,6 +171,11 @@ static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
if (user_cmd.command_size > PAGE_SIZE - sizeof(union qxl_release_info))
return -EINVAL;
if (!access_ok(VERIFY_READ,
(void *)(unsigned long)user_cmd.command,
user_cmd.command_size))
return -EFAULT;
ret = qxl_alloc_release_reserved(qdev,
sizeof(union qxl_release_info) +
user_cmd.command_size,
......
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