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From:   Michael Ellerman <patch-notifications@ellerman.id.au>
To:     pmenzel@molgen.mpg.de,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>
Cc:     linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
In-Reply-To: <d5e3c8e66bad3725d7d48d0e45c4b7eb7c02631d.1620455671.git.christophe.leroy@csgroup.eu>
References: <d5e3c8e66bad3725d7d48d0e45c4b7eb7c02631d.1620455671.git.christophe.leroy@csgroup.eu>
Subject: Re: [PATCH] powerpc/legacy_serial: Fix UBSAN: array-index-out-of-bounds
Message-Id: <162111863369.1890426.15615918327643788763.b4-ty@ellerman.id.au>
Date:   Sun, 16 May 2021 08:43:53 +1000
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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