From: Colin Ian King Date: Wed, 7 Sep 2016 17:10:27 +0000 (-0300) Subject: [media] VPU: mediatek: fix null pointer dereference on pdev X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=211eba9e791e6f6f4c5945b7fabc1dba150075e4;p=linux-beck.git [media] VPU: mediatek: fix null pointer dereference on pdev pdev is being null checked, however, prior to that it is being dereferenced by platform_get_drvdata. Move the assignments of vpu and run to after the pdev null check to avoid a potential null pointer dereference. Signed-off-by: Colin Ian King Reviewed-by: Tiffany Lin Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c index 63510de0147c..c3643d929167 100644 --- a/drivers/media/platform/mtk-vpu/mtk_vpu.c +++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c @@ -534,9 +534,9 @@ static int load_requested_vpu(struct mtk_vpu *vpu, int vpu_load_firmware(struct platform_device *pdev) { - struct mtk_vpu *vpu = platform_get_drvdata(pdev); + struct mtk_vpu *vpu; struct device *dev = &pdev->dev; - struct vpu_run *run = &vpu->run; + struct vpu_run *run; const struct firmware *vpu_fw = NULL; int ret; @@ -545,6 +545,9 @@ int vpu_load_firmware(struct platform_device *pdev) return -EINVAL; } + vpu = platform_get_drvdata(pdev); + run = &vpu->run; + mutex_lock(&vpu->vpu_mutex); if (vpu->fw_loaded) { mutex_unlock(&vpu->vpu_mutex);