From: Kefeng Wang Date: Mon, 13 May 2019 07:18:29 +0000 (-0400) Subject: media: vim2m: fix two double-free issues X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=20059cbbf981ca954be56f7963ae494d18e2dda1;p=openwrt%2Fstaging%2Fblogic.git media: vim2m: fix two double-free issues vim2m_device_release() will be called by video_unregister_device() to release various objects. There are two double-free issue, 1. dev->m2m_dev will be freed twice in error_m2m path/vim2m_device_release 2. the error_v4l2 and error_free path in vim2m_probe() will release same objects, since vim2m_device_release has done. Fixes: ea6c7e34f3b2 ("media: vim2m: replace devm_kzalloc by kzalloc") Cc: Laurent Pinchart Reported-by: Hulk Robot Signed-off-by: Kefeng Wang Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/vim2m.c b/drivers/media/platform/vim2m.c index 243c82b5d537..acd3bd48c7e2 100644 --- a/drivers/media/platform/vim2m.c +++ b/drivers/media/platform/vim2m.c @@ -1359,7 +1359,7 @@ static int vim2m_probe(struct platform_device *pdev) MEDIA_ENT_F_PROC_VIDEO_SCALER); if (ret) { v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n"); - goto error_m2m; + goto error_dev; } ret = media_device_register(&dev->mdev); @@ -1373,11 +1373,11 @@ static int vim2m_probe(struct platform_device *pdev) #ifdef CONFIG_MEDIA_CONTROLLER error_m2m_mc: v4l2_m2m_unregister_media_controller(dev->m2m_dev); -error_m2m: - v4l2_m2m_release(dev->m2m_dev); #endif error_dev: video_unregister_device(&dev->vfd); + /* vim2m_device_release called by video_unregister_device to release various objects */ + return ret; error_v4l2: v4l2_device_unregister(&dev->v4l2_dev); error_free: