From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Date: Fri, 08 Nov 2013 09:53:48 +0000 Subject: [patch] serial: icom: dereference after free in load_code() Message-Id: <20131108095348.GL27977@elgon.mountain> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Greg Kroah-Hartman Cc: Jiri Slaby , linux-serial@vger.kernel.org, kernel-janitors@vger.kernel.org We use "fw" in the next line after we release it. I've shifted the call to release_firmware() down a couple lines to fix this. Signed-off-by: Dan Carpenter diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c index d98e433..6742380 100644 --- a/drivers/tty/serial/icom.c +++ b/drivers/tty/serial/icom.c @@ -455,11 +455,11 @@ static void load_code(struct icom_port *icom_port) for (index = 0; index < fw->size; index++) new_page[index] = fw->data[index]; - release_firmware(fw); - writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length); writel(temp_pci, &icom_port->dram->mac_load_addr); + release_firmware(fw); + /*Setting the syncReg to 0x80 causes adapter to start downloading the personality code into adapter instruction RAM. Once code is loaded, it will begin executing and, based on