linux-kernel - [PATCH 3/4] alpha: Return directly after a failed copy_from

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Date:   Wed, 18 Jan 2017 12:47:54 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-alpha@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Jan-Benedict Glaw <jbglaw@...-owl.de>,
        Matt Turner <mattst88@...il.com>,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        Richard Cochran <richardcochran@...il.com>,
        Richard Henderson <rth@...ddle.net>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 3/4] alpha: Return directly after a failed copy_from_user() or
 getname() in two functions

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 18 Jan 2017 11:30:06 +0100

Return directly after a call of the function "copy_from_user" or "getname"
failed at the beginning.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 arch/alpha/kernel/osf_sys.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 73ff5d698591..4310bc79d09c 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -454,16 +454,13 @@ osf_ufs_mount(const char __user *dirname,
 	struct cdfs_args tmp;
 	struct filename *devname;
 
-	retval = -EFAULT;
 	if (copy_from_user(&tmp, args, sizeof(tmp)))
-		goto out;
+		return -EFAULT;
 	devname = getname(tmp.devname);
-	retval = PTR_ERR(devname);
 	if (IS_ERR(devname))
-		goto out;
+		return PTR_ERR(devname);
 	retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
 	putname(devname);
- out:
 	return retval;
 }
 
@@ -475,16 +472,13 @@ osf_cdfs_mount(const char __user *dirname,
 	struct cdfs_args tmp;
 	struct filename *devname;
 
-	retval = -EFAULT;
 	if (copy_from_user(&tmp, args, sizeof(tmp)))
-		goto out;
+		return -EFAULT;
 	devname = getname(tmp.devname);
-	retval = PTR_ERR(devname);
 	if (IS_ERR(devname))
-		goto out;
+		return PTR_ERR(devname);
 	retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
 	putname(devname);
- out:
 	return retval;
 }
 
-- 
2.11.0