From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Trond Myklebust , Ben Hutchings , Rui Xiang Subject: [PATCH 3.4 089/214] NFSv4.1: integer overflow in decode_cb_sequence_args() Date: Wed, 4 Jun 2014 21:17:32 -0700 Message-Id: <20140605041651.569452248@linuxfoundation.org> In-Reply-To: <20140605041639.638675216@linuxfoundation.org> References: <20140605041639.638675216@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter commit 0439f31c35d1da0b28988b308ea455e38e6a350d upstream. This seems like it could overflow on 32 bits. Use kmalloc_array() which has overflow protection built in. Signed-off-by: Dan Carpenter Signed-off-by: Trond Myklebust Signed-off-by: Ben Hutchings Cc: Rui Xiang Signed-off-by: Greg Kroah-Hartman --- fs/nfs/callback_xdr.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -455,9 +455,9 @@ static __be32 decode_cb_sequence_args(st args->csa_nrclists = ntohl(*p++); args->csa_rclists = NULL; if (args->csa_nrclists) { - args->csa_rclists = kmalloc(args->csa_nrclists * - sizeof(*args->csa_rclists), - GFP_KERNEL); + args->csa_rclists = kmalloc_array(args->csa_nrclists, + sizeof(*args->csa_rclists), + GFP_KERNEL); if (unlikely(args->csa_rclists == NULL)) goto out;