From: "PaX Team" <pageexec@freemail.hu>
To: linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>
Cc: Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@amacapital.net>,
"H. Peter Anvin" <hpa@zytor.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Mathias Krause <minipli@googlemail.com>,
Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
x86@kernel.org, Arnd Bergmann <arnd@arndb.de>,
Emese Revfy <re.emese@gmail.com>,
kernel-hardening@lists.openwall.com,
linux-arch <linux-arch@vger.kernel.org>
Subject: Re: [PATCH v2 2/4] introduce post-init read-only memory
Date: Thu, 26 Nov 2015 01:15:11 +0100 [thread overview]
Message-ID: <56564F0F.3158.108D0B78@pageexec.freemail.hu> (raw)
In-Reply-To: <1448494286-16029-3-git-send-email-keescook@chromium.org>
On 25 Nov 2015 at 15:31, Kees Cook wrote:
> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> index c4bd0e2c173c..772c784ba763 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -256,6 +256,7 @@
> .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
> VMLINUX_SYMBOL(__start_rodata) = .; \
> *(.rodata) *(.rodata.*) \
> + *(.data..ro_after_init) /* Read only after init */ \
^^^^^^^^^^^
looks like it's tabs vs. spaces...
> +/*
> + * __read_only is used to mark things that are read-only after init (i.e.
^^^^^^^^^^^
i know you liked the old name but probably this one needs to change too :P
> + * after mark_rodata_ro() has been called). These are effectively read-only,
> + * but may get written to during init, so can't live in .rodata (via "const").
> + */
> +#ifndef __ro_after_init
> +#define __ro_after_init __attribute__((__section__(".data..ro_after_init")))
> +#endif
next prev parent reply other threads:[~2015-11-26 0:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-25 23:31 [PATCH v2 0/4] introduce post-init read-only memory Kees Cook
2015-11-25 23:31 ` [PATCH v2 1/4] init: create cmdline param to disable readonly Kees Cook
2015-11-26 0:37 ` PaX Team
2015-11-26 0:44 ` [kernel-hardening] " Greg KH
2015-11-26 7:51 ` Ingo Molnar
2015-11-30 21:52 ` Kees Cook
2015-11-30 22:24 ` Russell King - ARM Linux
2015-11-30 22:34 ` Kees Cook
2015-12-01 7:24 ` Ingo Molnar
2015-12-01 7:19 ` Heiko Carstens
2015-11-25 23:31 ` [PATCH v2 2/4] introduce post-init read-only memory Kees Cook
2015-11-26 0:15 ` PaX Team [this message]
2015-11-30 22:24 ` H. Peter Anvin
2015-12-09 19:35 ` Kees Cook
2015-11-25 23:31 ` [PATCH v2 3/4] lkdtm: verify that __ro_after_init works correctly Kees Cook
2015-11-25 23:31 ` [PATCH v2 4/4] x86, vdso: mark vDSO read-only after init Kees Cook
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