linux-kernel - [PATCH 05/38] staging: lustre: fix handling lustre_posix_acl_xattr

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Date:	Mon, 21 Sep 2015 15:33:37 +0200
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Oleg Drokin <oleg.drokin@...el.com>,
	Andreas Dilger <andreas.dilger@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	lustre-devel@...ts.lustre.org, devel@...verdev.osuosl.org
Subject: [PATCH 05/38] staging: lustre: fix handling
 lustre_posix_acl_xattr_filter result

The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
 drivers/staging/lustre/lustre/llite/xattr.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c
index 362a87d..dddc1ff 100644
--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -175,11 +175,12 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 			}
 			ee_free(ee);
 		} else if (rce->rce_ops == RMT_RSETFACL) {
-			size = lustre_posix_acl_xattr_filter(
+			rc = lustre_posix_acl_xattr_filter(
 						(posix_acl_xattr_header *)value,
 						size, &new_value);
-			if (unlikely(size < 0))
-				return size;
+			if (unlikely(rc < 0))
+				return rc;
+			size = rc;
 
 			pv = (const char *)new_value;
 		} else
-- 
1.9.1

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