Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753319AbcJJRNu (ORCPT ); Mon, 10 Oct 2016 13:13:50 -0400 Received: from mail-pa0-f42.google.com ([209.85.220.42]:33083 "EHLO mail-pa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752880AbcJJRNs (ORCPT ); Mon, 10 Oct 2016 13:13:48 -0400 From: Hoan Tran To: Wolfram Sang , linux-i2c@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Phil Endecott , Loc Ho , tnhuynh@apm.com, patches@apm.com, Hoan Tran Subject: [PATCH] i2c: xgene: Avoid dma_buffer overrun Date: Mon, 10 Oct 2016 10:13:10 -0700 Message-Id: <1476119590-21489-1-git-send-email-hotran@apm.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 851 Lines: 24 SMBus block command uses the first byte of buffer for the data length. The dma_buffer should be increased by 1 to avoid the overrun issue. Reported-by: Phil Endecott Signed-off-by: Hoan Tran --- drivers/i2c/busses/i2c-xgene-slimpro.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-xgene-slimpro.c b/drivers/i2c/busses/i2c-xgene-slimpro.c index 4233f56..3c38029 100644 --- a/drivers/i2c/busses/i2c-xgene-slimpro.c +++ b/drivers/i2c/busses/i2c-xgene-slimpro.c @@ -105,7 +105,7 @@ struct slimpro_i2c_dev { struct mbox_chan *mbox_chan; struct mbox_client mbox_client; struct completion rd_complete; - u8 dma_buffer[I2C_SMBUS_BLOCK_MAX]; + u8 dma_buffer[I2C_SMBUS_BLOCK_MAX + 1]; /* dma_buffer[0] is used for length */ u32 *resp_msg; }; -- 1.9.1