From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vladimir Motyka Date: Mon, 09 May 2011 14:05:31 +0000 Subject: [PATCH] drivers/mmc/card/block.c: fix potential null dereference Message-Id: <4DC7F4AB.90607@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: cjb@laptop.org Cc: kernel-janitors@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org When allocation of idata fails there was a null dereferece. Signed-off-by: Vladimir Motyka --- diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 407836d..3dec493 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -266,10 +266,10 @@ static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user( return idata; copy_err: - kfree(idata->buf); + if(idata) + kfree(idata->buf); kfree(idata); return ERR_PTR(err); - } static int mmc_blk_ioctl_cmd(struct block_device *bdev,