Re: [PATCH 183/190] Revert "media: isif: fix a NULL pointer dereference bug"

Greg Kroah-Hartman
2021-04-27T13:16:59Z

On Wed, Apr 21, 2021 at 03:00:58PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit a26ac6c1bed951b2066cc4b2257facd919e35c0b.
>
> Commits from @umn.edu addresses have been found to be submitted in "bad
> faith" to try to test the kernel community's ability to review "known
> malicious" changes. The result of these submissions can be found in a
> paper published at the 42nd IEEE Symposium on Security and Privacy
> entitled, "Open Source Insecurity: Stealthily Introducing
> Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> of Minnesota) and Kangjie Lu (University of Minnesota).
>
> Because of this, all submissions from this group must be reverted from
> the kernel tree and will need to be re-reviewed again to determine if
> they actually are a valid fix. Until that work is complete, remove this
> change to ensure that no problems are being introduced into the
> codebase.
>
> Cc: Wenwen Wang <wang6495@umn.edu>
> Cc: Hans Verkuil <hverkuil@xs4all.nl>
> Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> drivers/media/platform/davinci/isif.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/davinci/isif.c b/drivers/media/platform/davinci/isif.c
> index c53cecd072b1..5355a14c090b 100644
> --- a/drivers/media/platform/davinci/isif.c
> +++ b/drivers/media/platform/davinci/isif.c
> @@ -1086,8 +1086,7 @@ static int isif_probe(struct platform_device *pdev)
>
> while (i >= 0) {
> res = platform_get_resource(pdev, IORESOURCE_MEM, i);
> - if (res)
> - release_mem_region(res->start, resource_size(res));
> + release_mem_region(res->start, resource_size(res));
> i--;
> }
> vpfe_unregister_ccdc_device(&isif_hw_dev);
> --
> 2.31.1
>

This looks correct, dropping it.

greg k-h