From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Christophe Leroy <christophe.leroy@c-s.fr>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/mm: don't log user reads to 0xffffffff
Date: Wed, 29 Jan 2020 16:17:28 +1100 (AEDT) [thread overview]
Message-ID: <486sDm0x6Cz9sRl@ozlabs.org> (raw)
In-Reply-To: <0728849e826ba16f1fbd6fa7f5c6cc87bd64e097.1577087627.git.christophe.leroy@c-s.fr>
On Mon, 2019-12-23 at 07:54:22 UTC, Christophe Leroy wrote:
> Running vdsotest leaves many times the following log:
>
> [ 79.629901] vdsotest[396]: User access of kernel address (ffffffff) - exploit attempt? (uid: 0)
>
> A pointer set to (-1) is likely a programming error similar to
> a NULL pointer and is not worth logging as an exploit attempt.
>
> Don't log user accesses to 0xffffffff.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/0f9aee0cb9da7db7d96f63cfa2dc5e4f1bffeb87
cheers
prev parent reply other threads:[~2020-01-29 5:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-23 7:54 [PATCH] powerpc/mm: don't log user reads to 0xffffffff Christophe Leroy
2019-12-23 7:54 ` Christophe Leroy
2020-01-29 5:17 ` Michael Ellerman [this message]
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