All of lore.kernel.org
 help / color / mirror / Atom feed
From: Will Deacon <will@kernel.org>
To: gregkh@linuxfoundation.org
Cc: linux-kernel@vger.kernel.org, Will Deacon <will.deacon@arm.com>,
	"# 4 . 9+" <stable@vger.kernel.org>,
	Aurelien Jarno <aurelien@aurel32.net>,
	Arnd Bergmann <arnd@arndb.de>,
	Dominik Brodowski <linux@dominikbrodowski.net>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Oleg Nesterov <oleg@redhat.com>,
	Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH] arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ
Date: Tue, 30 Jul 2019 10:25:47 +0100	[thread overview]
Message-ID: <20190730092547.1284-1-will@kernel.org> (raw)

From: Will Deacon <will.deacon@arm.com>

[ Upstream commit 24951465cbd279f60b1fdc2421b3694405bcff42 ]

arch/arm/ defines a SIGMINSTKSZ of 2k, so we should use the same value
for compat tasks.

Cc: <stable@vger.kernel.org> # 4.9+
Cc: Aurelien Jarno <aurelien@aurel32.net>
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>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Reported-by: Steve McIntyre <steve.mcintyre@arm.com>
Tested-by: Steve McIntyre <93sam@debian.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

Aurelien points out that this didn't get selected for -stable despite its
counterpart (22839869f21a ("signal: Introduce COMPAT_SIGMINSTKSZ for use
in compat_sys_sigaltstack")) being backported to 4.9. Oops.

 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)
 {
-- 
2.11.0


             reply	other threads:[~2019-07-30  9:25 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-30  9:25 Will Deacon [this message]
2019-07-30  9:37 ` [PATCH] arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ Greg KH
2019-07-30  9:39   ` Will Deacon
2019-07-30  9:42     ` Greg KH
2019-07-31  9:47       ` Greg KH
2019-07-31 10:00         ` Aurelien Jarno

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=20190730092547.1284-1-will@kernel.org \
    --to=will@kernel.org \
    --cc=akpm@linux-foundation.org \
    --cc=arnd@arndb.de \
    --cc=aurelien@aurel32.net \
    --cc=catalin.marinas@arm.com \
    --cc=ebiederm@xmission.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@dominikbrodowski.net \
    --cc=oleg@redhat.com \
    --cc=stable@vger.kernel.org \
    --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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.