Patch "i2c: xgene: Avoid dma_buffer overrun" has been added to the 4.4-stable tree

Patch "i2c: xgene: Avoid dma_buffer overrun" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    i2c: xgene: Avoid dma_buffer overrun

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     i2c-xgene-avoid-dma_buffer-overrun.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 603616017c35f4d0fbdbcace72adf9bf949c4a65 Mon Sep 17 00:00:00 2001
From: Hoan Tran <hotran@apm.com>
Date: Mon, 10 Oct 2016 10:13:10 -0700
Subject: i2c: xgene: Avoid dma_buffer overrun

From: Hoan Tran <hotran@apm.com>

commit 603616017c35f4d0fbdbcace72adf9bf949c4a65 upstream.

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 <phil_gjouf_endecott@chezphil.org>
Signed-off-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/i2c/busses/i2c-xgene-slimpro.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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;
 };
 


Patches currently in stable-queue which might be from hotran@apm.com are

queue-4.4/i2c-xgene-avoid-dma_buffer-overrun.patch