linux-kernel - Re: [PATCH v2] x86/tools/relocs: fix big section header tables

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Message-ID: <20181129155750.xskdusm2fvub6tqa@treble>
Date:   Thu, 29 Nov 2018 09:57:50 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Artem Savkov <asavkov@...hat.com>
Cc:     x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] x86/tools/relocs: fix big section header tables

On Thu, Nov 29, 2018 at 04:56:15PM +0100, Artem Savkov wrote:
> In case when the number of entries in the section header table is larger
> then or equal to SHN_LORESERVE the size of the table is held in the sh_size
> member of the initial entry in section header table instead of e_shnum.
> Same with the string table index which is located in sh_link instead of
> e_shstrndx.
> 
> This case is easily reproducible with KCFLAGS="-ffunction-sections",
> bzImage build fails with "String table index out of bounds" error.
> 
> Signed-off-by: Artem Savkov <asavkov@...hat.com>

Reviewed-by: Josh Poimboeuf <jpoimboe@...hat.com>

-- 
Josh