On Sat, Mar 04, 2023 at 12:32:22AM +0300, Dmitry Osipenko wrote:
> On 3/2/23 20:25, Harshit Mogalapalli wrote:
> > In virtio_gpu_object_shmem_init() we are passing NULL to PTR_ERR, which
> > is returning 0/success.
> >
> > Fix this by storing error value in 'ret' variable before assigning
> > shmem->pages to NULL.
> >
> > Found using static analysis with Smatch.
> >
> > Fixes: 64b88afbd92f ("drm/virtio: Correct drm_gem_shmem_get_sg_table() error handling")
> > Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx>
> > ---
> > Only compile tested.
> >
> > Upstream commit b5c9ed70d1a9 ("drm/virtio: Improve DMA API usage for shmem BOs")
> > deleted this code, so this patch is not necessary in linux-6.1.y and
> > linux-6.2.y.
> > ---
> > drivers/gpu/drm/virtio/virtgpu_object.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
> > index 7e75fb0fc7bd..25d399b00404 100644
> > --- a/drivers/gpu/drm/virtio/virtgpu_object.c
> > +++ b/drivers/gpu/drm/virtio/virtgpu_object.c
> > @@ -169,8 +169,9 @@ static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev,
> > shmem->pages = drm_gem_shmem_get_sg_table(&bo->base);
> > if (IS_ERR(shmem->pages)) {
> > drm_gem_shmem_unpin(&bo->base);
> > + ret = PTR_ERR(shmem->pages);
> > shmem->pages = NULL;
> > - return PTR_ERR(shmem->pages);
> > + return ret;
> > }
> >
> > if (use_dma_api) {
>
> Reviewed-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Both fixes now queued up, thanks.
greg k-h
