linux-kernel - Re: [PATCH v4 3/4] RAS/AMD/ATL: Validate address map when information is gathered

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Date: Tue, 28 May 2024 12:11:12 +0200
From: Borislav Petkov <bp@...en8.de>
To: John Allen <john.allen@....com>
Cc: linux-edac@...r.kernel.org, tony.luck@...el.com, yazen.ghannam@....com,
	linux-kernel@...r.kernel.org, avadhut.naik@....com,
	muralidhara.mk@....com
Subject: Re: [PATCH v4 3/4] RAS/AMD/ATL: Validate address map when
 information is gathered

On Mon, May 06, 2024 at 03:46:04PM +0000, John Allen wrote:
> +static int validate_address_map(struct addr_ctx *ctx)
> +{
> +	switch (ctx->map.intlv_mode) {
> +	case DF2_2CHAN_HASH:
> +	case DF3_COD4_2CHAN_HASH:
> +	case DF3_COD2_4CHAN_HASH:
> +	case DF3_COD1_8CHAN_HASH:
> +		if (!map_bits_valid(ctx, 8, 9, 1, 1))
> +			goto out;
> +		break;
> +
> +	case DF4_NPS4_2CHAN_HASH:
> +	case DF4_NPS2_4CHAN_HASH:
> +	case DF4_NPS1_8CHAN_HASH:
> +	case DF4p5_NPS4_2CHAN_1K_HASH:
> +	case DF4p5_NPS4_2CHAN_2K_HASH:
> +	case DF4p5_NPS2_4CHAN_1K_HASH:
> +	case DF4p5_NPS2_4CHAN_2K_HASH:
> +	case DF4p5_NPS1_8CHAN_1K_HASH:
> +	case DF4p5_NPS1_8CHAN_2K_HASH:
> +	case DF4p5_NPS1_16CHAN_1K_HASH:
> +	case DF4p5_NPS1_16CHAN_2K_HASH:
> +		if (!map_bits_valid(ctx, 8, 8, 1, 2))
> +			goto out;
> +		break;
> +
> +	case MI3_HASH_8CHAN:
> +	case MI3_HASH_16CHAN:
> +	case MI3_HASH_32CHAN:
> +		if (!map_bits_valid(ctx, 8, 8, 4, 1))
> +			goto out;
> +		break;
> +
> +	/* Nothing to do for modes that don't need special validation checks. */
> +	default:
> +		break;
> +	}
> +
> +	return 0;
> +
> +out:

s/out/err/

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette