From: Dave Martin <Dave.Martin@arm.com>
To: Will Deacon <will.deacon@arm.com>
Cc: linux-kernel@vger.kernel.org, arnd@arndb.de, oleg@redhat.com,
linux@dominikbrodowski.net, viro@zeniv.linux.org.uk,
akpm@linux-foundation.org, steve.mcintyre@arm.com,
linux-arm-kernel@lists.infradead.org, ebiederm@xmission.com
Subject: Re: [PATCH 2/2] arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ
Date: Wed, 25 Jul 2018 16:55:13 +0100 [thread overview]
Message-ID: <20180725155513.GS4240@e103592.cambridge.arm.com> (raw)
In-Reply-To: <1532526312-26993-3-git-send-email-will.deacon@arm.com>
On Wed, Jul 25, 2018 at 02:45:12PM +0100, Will Deacon wrote:
> arch/arm/ defines a SIGMINSTKSZ of 2k, so we should use the same value
> for compat tasks.
>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Dominik Brodowski <linux@dominikbrodowski.net>
> Cc: "Eric W. Biederman" <ebiederm@xmission.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Al Viro <viro@zeniv.linux.org.uk>
> Cc: Oleg Nesterov <oleg@redhat.com>
> Reported-by: Steve McIntyre <steve.mcintyre@arm.com>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
> ---
> arch/arm64/include/asm/compat.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
> index 1a037b94eba1..cee28a05ee98 100644
> --- a/arch/arm64/include/asm/compat.h
> +++ b/arch/arm64/include/asm/compat.h
> @@ -159,6 +159,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
> }
>
> #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
> +#define COMPAT_MINSIGSTKSZ 2048
>
> static inline void __user *arch_compat_alloc_user_space(long len)
> {
> --
> 2.1.4
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2018-07-25 15:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-25 13:45 [PATCH 0/2] Don't use SIGMINSTKSZ when enforcing alternative signal stack size for compat tasks Will Deacon
2018-07-25 13:45 ` [PATCH 1/2] signal: Introduce COMPAT_SIGMINSTKSZ for use in compat_sys_sigaltstack Will Deacon
2018-07-25 15:54 ` Dave Martin
2018-07-25 16:37 ` Will Deacon
2018-07-26 10:44 ` Dave Martin
2018-07-25 13:45 ` [PATCH 2/2] arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ Will Deacon
2018-07-25 15:55 ` Dave Martin [this message]
2019-07-29 20:23 ` [PATCH 0/2] Don't use SIGMINSTKSZ when enforcing alternative signal stack size for compat tasks Aurelien Jarno
2019-07-30 9:27 ` Will Deacon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180725155513.GS4240@e103592.cambridge.arm.com \
--to=dave.martin@arm.com \
--cc=akpm@linux-foundation.org \
--cc=arnd@arndb.de \
--cc=ebiederm@xmission.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@dominikbrodowski.net \
--cc=oleg@redhat.com \
--cc=steve.mcintyre@arm.com \
--cc=viro@zeniv.linux.org.uk \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox