linux-kernel - Re: [PATCH] mmc: part_switch: fixes switch on gp3 partition

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Wed, 6 Mar 2024 14:03:47 +0100
From: Linus Walleij <linus.walleij@...aro.org>
To: "Jorge Ramirez-Ortiz, Foundries" <jorge@...ndries.io>
Cc: Dominique Martinet <asmadeus@...ewreck.org>, Ulf Hansson <ulf.hansson@...aro.org>, 
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Dominique Martinet <dominique.martinet@...ark-techno.com>, stable@...r.kernel.org
Subject: Re: [PATCH] mmc: part_switch: fixes switch on gp3 partition

On Wed, Mar 6, 2024 at 10:05 AM Jorge Ramirez-Ortiz, Foundries
<jorge@...ndries.io> wrote:

> That looked strange as there should be support for 4 GP but this code
> kind of convinced me of the opposite.
>
>         if (idata->rpmb) {
>                 /* Support multiple RPMB partitions */
>                 target_part = idata->rpmb->part_index;
>                 target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB;
>         }
>
> So if we apply the fix that you propose, how are multiple RPMB
> partitions (ie, 4) going to be identified as RPMB? Unless there can't be
> more than 3?

Sorry for writing bad code comments.

This comment means:

"support multiple RPMB partitions [on the same Linux system]"

not:

"support multiple RPMB partitions [on the same eMMC device]"

Yours,
Linus Walleij