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 v2] powerpc/8xx: Fix STRICT_KERNEL_RWX startup test failure
Date: Sun, 26 Apr 2020 09:51:17 +1000 (AEST) [thread overview]
Message-ID: <498nqn4vzVz9sSh@ozlabs.org> (raw)
In-Reply-To: <485caac75f195f18c11eb077b0031fdd2bb7fb9e.1587361039.git.christophe.leroy@c-s.fr>
On Mon, 2020-04-20 at 05:37:42 UTC, Christophe Leroy wrote:
> WRITE_RO lkdtm test works.
>
> But when selecting CONFIG_DEBUG_RODATA_TEST, the kernel reports
> rodata_test: test data was not read only
>
> This is because when rodata test runs, there are still old entries
> in TLB.
>
> Flush TLB after setting kernel pages RO or NX.
>
> Fixes: d5f17ee96447 ("powerpc/8xx: don't disable large TLBs with CONFIG_STRICT_KERNEL_RWX")
> Cc: stable@vger.kernel.org
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/b61c38baa98056d4802ff5be5cfb979efc2d0f7a
cheers
prev parent reply other threads:[~2020-04-25 23:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-20 5:37 [PATCH v2] powerpc/8xx: Fix STRICT_KERNEL_RWX startup test failure Christophe Leroy
2020-04-25 23:51 ` Michael Ellerman [this message]
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