linux-kernel - [PATCH] xattr: fix kstrdup.cocci warnings

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Date:   Sun, 25 Jun 2017 05:02:24 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Stefan Berger <stefanb@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, ebiederm@...ssion.com,
        containers@...ts.linux-foundation.org, lkp@...org,
        xiaolong.ye@...el.com, linux-kernel@...r.kernel.org,
        zohar@...ux.vnet.ibm.com, serge@...lyn.com, tycho@...ker.com,
        James.Bottomley@...senPartnership.com,
        christian.brauner@...lbox.org, stefanb@...ux.vnet.ibm.com,
        vgoyal@...hat.com, amir73il@...il.com,
        linux-security-module@...r.kernel.org
Subject: [PATCH] xattr: fix kstrdup.cocci warnings

fs/xattr.c:516:10-17: WARNING opportunity for kstrdep (strcpy on line 519)

 Use kstrdup rather than duplicating its implementation

Generated by: scripts/coccinelle/api/kstrdup.cocci

CC: Stefan Berger <stefanb@...ux.vnet.ibm.com>
Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---

 xattr.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -513,10 +513,9 @@ xattr_userns_name(const char *fullname,
 	return buffer;
 
 out_copy:
-	buffer = kmalloc(strlen(suffix) + 1, GFP_KERNEL);
+	buffer = kstrdup(suffix, GFP_KERNEL);
 	if (!buffer)
 		return ERR_PTR(-ENOMEM);
-	strcpy(buffer, suffix);
 
 	return buffer;