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X-powerpc-patch-notification: thanks
X-powerpc-patch-commit: cc6f0e39000900e5dd1448103a9571f0eccd7d4e
In-Reply-To: <b1177cdfc6af74a3e277bba5d9e708c4b3315ebe.1583575707.git.christophe.leroy@c-s.fr>
To:     Christophe Leroy <christophe.leroy@c-s.fr>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>, ndesaulniers@google.com
From:   Michael Ellerman <patch-notifications@ellerman.id.au>
Cc:     linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/32: Fix missing NULL pmd check in virt_to_kpte()
Message-Id: <48hYYQ3LhHz9sSX@ozlabs.org>
Date:   Wed, 18 Mar 2020 00:14:50 +1100 (AEDT)
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On Sat, 2020-03-07 at 10:09:15 UTC, Christophe Leroy wrote:
> Commit 2efc7c085f05 ("powerpc/32: drop get_pteptr()"),
> replaced get_pteptr() by virt_to_kpte(). But virt_to_kpte() lacks a
> NULL pmd check and returns an invalid non NULL pointer when there
> is no page table.
> 
> Reported-by: Nick Desaulniers <ndesaulniers@google.com>
> Fixes: 2efc7c085f05 ("powerpc/32: drop get_pteptr()")
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/cc6f0e39000900e5dd1448103a9571f0eccd7d4e

cheers