Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel

[Borislav Petkov]

On Mon, Jan 09, 2017 at 11:41:15PM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Subject: [PATCH] IOMMU / AMD: Fix error code path in early_amd_iommu_init()
> 
> Prevent early_amd_iommu_init() from leaking memory mapped via
> acpi_get_table() if check_ivrs_checksum() returns an error.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> ---
>  drivers/iommu/amd_iommu_init.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux-pm/drivers/iommu/amd_iommu_init.c
> ===================================================================
> --- linux-pm.orig/drivers/iommu/amd_iommu_init.c
> +++ linux-pm/drivers/iommu/amd_iommu_init.c
> @@ -2230,7 +2230,7 @@ static int __init early_amd_iommu_init(v
>  	 */
>  	ret = check_ivrs_checksum(ivrs_base);
>  	if (ret)
> -		return ret;
> +		goto out;
>  
>  	amd_iommu_target_ivhd_type = get_highest_supported_ivhd_type(ivrs_base);
>  	DUMP_printk("Using IVHD type %#x\n", amd_iommu_target_ivhd_type);

Reviewed-by: Borislav Petkov <bp@xxxxxxx>

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.