linux-hardening - Re: [PATCH] Update creation of flash_block

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Date:   Mon, 28 Aug 2023 16:02:53 -0500
From:   Nathan Lynch <nathanl@...ux.ibm.com>
To:     Audra Mitchell <aubaker@...hat.com>, linuxppc-dev@...ts.ozlabs.org
Cc:     linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
        aubaker@...hat.com, keescook@...omium.org,
        christophe.leroy@...roup.eu, npiggin@...il.com, mpe@...erman.id.au
Subject: Re: [PATCH] Update creation of flash_block_cache to accout for
 potential panic

Audra Mitchell <aubaker@...hat.com> writes:
> With PPC builds enabling CONFIG_HARDENED_USERCOPY, interacting with the RunTime
> Abstraction Services (RTAS) firmware by writing to
> /proc/powerpc/rtas/firmware_flash will end up triggering the mm/usercopy.c:101
> assertion:

Thanks, this was fixed already:

4f3175979e62 "powerpc/rtas_flash: allow user copy to flash block cache objects"