linux-kernel - [PATCH 3/3] s390/compat: change parameter types from unsigned long to compat_ulong

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Message-Id: <1390828905-52245-4-git-send-email-heiko.carstens@de.ibm.com>
Date:	Mon, 27 Jan 2014 14:21:45 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Al Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-kernel@...r.kernel.org,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: [PATCH 3/3] s390/compat: change parameter types from unsigned long to compat_ulong_t

Change parameter types of s390's compat ipc syscall from unsigned long to
compat_ulong_t to enforce zero extension of these parameters.

This is not really a bug, since s390_ipc compat syscall is only a wrapper
to the generic compat_sys_ipc() syscall, which performs correct zero and
sign extension.

This was introduced with 56e41d3c5aa84 "merge compat sys_ipc instances".

Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
---
 arch/s390/kernel/compat_linux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index e030d2bdec1b..db02052bd137 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -286,8 +286,8 @@ asmlinkage long sys32_getegid16(void)
 }
 
 #ifdef CONFIG_SYSVIPC
-COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, unsigned long, second,
-		unsigned long, third, compat_uptr_t, ptr)
+COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
+		compat_ulong_t, third, compat_uptr_t, ptr)
 {
 	if (call >> 16)		/* hack for backward compatibility */
 		return -EINVAL;
-- 
1.8.4.5

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