netdev - [patch 1/2] 9p: move dereference after NULL check

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Message-ID: <20110826165559.GE3775@shale.localdomain>
Date:	Fri, 26 Aug 2011 19:55:59 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Eric Van Hensbergen <ericvh@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Venkateswararao Jujjuri <jvrao@...ux.vnet.ibm.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	"M. Mohan Kumar" <mohan@...ibm.com>,
	"open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: [patch 1/2] 9p: move dereference after NULL check

We dereferenced "req->tc" and "req->rc" before checking for NULL.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/net/9p/client.c b/net/9p/client.c
index 3f8c046..b0bcace 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -248,10 +248,8 @@ static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag, int max_size)
 		init_waitqueue_head(req->wq);
 		req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
 				  GFP_NOFS);
-		req->tc->capacity = alloc_msize;
 		req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
 				  GFP_NOFS);
-		req->rc->capacity = alloc_msize;
 		if ((!req->tc) || (!req->rc)) {
 			printk(KERN_ERR "Couldn't grow tag array\n");
 			kfree(req->tc);
@@ -261,6 +259,8 @@ static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag, int max_size)
 			req->wq = NULL;
 			return ERR_PTR(-ENOMEM);
 		}
+		req->tc->capacity = alloc_msize;
+		req->rc->capacity = alloc_msize;
 		req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall);
 		req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall);
 	}
--
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