From 6f530e22fd4410ea1151b16085918eb8fdd20e15 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Fri, 6 May 2022 15:52:49 +0200 Subject: [PATCH] drm/tegra: gem: Do not try to dereference ERR_PTR() [ Upstream commit cb7e1abc2c73633e1eefa168ab2dad6e838899c9 ] When mapping the DMA-BUF attachment fails, map->sgt will be an ERR_PTR- encoded error code and the cleanup code would try to free that memory, which obviously would fail. Zero out that pointer after extracting the error code when this happens so that kfree() can do the right thing. Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- drivers/gpu/drm/tegra/gem.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c index fce0e52973c2..9810b3bdd342 100644 --- a/drivers/gpu/drm/tegra/gem.c +++ b/drivers/gpu/drm/tegra/gem.c @@ -88,6 +88,7 @@ static struct host1x_bo_mapping *tegra_bo_pin(struct device *dev, struct host1x_ if (IS_ERR(map->sgt)) { dma_buf_detach(buf, map->attach); err = PTR_ERR(map->sgt); + map->sgt = NULL; goto free; }