linux-kernel - Re: [PATCH] iommu/amd: Fix possible memory leak of 'domain'

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Message-ID: <8610d516-b83b-3614-04a4-5ed2d4b66c56@amd.com>
Date:   Wed, 7 Jun 2023 09:49:07 +0530
From:   Vasant Hegde <vasant.hegde@....com>
To:     Su Hui <suhui@...china.com>, Joerg Roedel <joro@...tes.org>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>
Cc:     jgg@...pe.ca, kevin.tian@...el.com, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iommu/amd: Fix possible memory leak of 'domain'



On 6/6/2023 12:37 PM, Su Hui wrote:
> free memory of domain before return NULL.
> 
> Fixes: 29f54745f245 ("iommu/amd: Add missing domain type checks")
> Signed-off-by: Su Hui <suhui@...china.com>

Reviewed-by: Vasant Hegde <vasant.hegde@....com>


-Vasant


> ---
>  drivers/iommu/amd/iommu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
> index dc1ec6849775..f08e65629c74 100644
> --- a/drivers/iommu/amd/iommu.c
> +++ b/drivers/iommu/amd/iommu.c
> @@ -2094,7 +2094,7 @@ static struct protection_domain *protection_domain_alloc(unsigned int type)
>  	} else if (type == IOMMU_DOMAIN_DMA || type == IOMMU_DOMAIN_DMA_FQ) {
>  		pgtable = amd_iommu_pgtable;
>  	} else {
> -		return NULL;
> +		goto out_err;
>  	}
>  
>  	switch (pgtable) {