linux-kernel - [PATCH] CIFS: check for granted memory

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Message-ID: <20070817191329.GA7218@cvg>
Date:	Fri, 17 Aug 2007 23:13:29 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Steve French <sfrench@...ba.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] CIFS: check for granted memory

This patch adds just a check for granted memory
to prevent possible NULL pointer usage.

Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
---

 fs/cifs/sess.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 2ea027d..892be9b 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -372,6 +372,10 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
 
 	/* 2000 big enough to fit max user, domain, NOS name etc. */
 	str_area = kmalloc(2000, GFP_KERNEL);
+	if (str_area == NULL) {
+		cifs_small_buf_release(smb_buf);
+		return -ENOMEM;
+	}
 	bcc_ptr = str_area;
 
 	ses->flags &= ~CIFS_SES_LANMAN;
-
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