From: Thierry Reding treding@nvidia.com
[ 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 lkp@intel.com Reported-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Thierry Reding treding@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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; }