linux-kernel - Re: [PATCH] powerpc/legacy_serial: Fix UBSAN: array-index-out-of-bounds

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Message-Id: <162111863369.1890426.15615918327643788763.b4-ty@ellerman.id.au>
Date:   Sun, 16 May 2021 08:43:53 +1000
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     pmenzel@...gen.mpg.de,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] powerpc/legacy_serial: Fix UBSAN: array-index-out-of-bounds

On Sat, 8 May 2021 06:36:21 +0000 (UTC), Christophe Leroy wrote:
> UBSAN complains when a pointer is calculated with invalid
> 'legacy_serial_console' index, allthough the index is verified
> before dereferencing the pointer.
> 
> Fix it by checking 'legacy_serial_console' validity before
> calculating pointers.

Applied to powerpc/fixes.

[1/1] powerpc/legacy_serial: Fix UBSAN: array-index-out-of-bounds
      https://git.kernel.org/powerpc/c/63970f3c37e75997ed86dbdfdc83df35f2152bb1

cheers