From 7ad61e6b4a79c5057eeb2d6062b0021e33ddc9f6 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Thu, 18 Aug 2016 22:35:14 +0200 Subject: [PATCH] virtio-gpu: Use memdup_user() rather than duplicating its implementation Reuse existing functionality from memdup_user() instead of keeping duplicate source code. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/401e68fc-5515-7a7a-be2e-503dee676b34@users.sourceforge.net --- drivers/gpu/drm/virtio/virtgpu_ioctl.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index c046903cb47b..512e7cddcbae 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -152,15 +152,10 @@ static int virtio_gpu_execbuffer(struct drm_device *dev, if (ret) goto out_free; - buf = kmalloc(exbuf->size, GFP_KERNEL); - if (!buf) { - ret = -ENOMEM; - goto out_unresv; - } - if (copy_from_user(buf, (void __user *)(uintptr_t)exbuf->command, - exbuf->size)) { - kfree(buf); - ret = -EFAULT; + buf = memdup_user((void __user *)(uintptr_t)exbuf->command, + exbuf->size); + if (IS_ERR(buf)) { + ret = PTR_ERR(buf); goto out_unresv; } virtio_gpu_cmd_submit(vgdev, buf, exbuf->size, -- 2.20.1