Patch "of: fix of_device_get_modalias returned length when truncating buffers" has been added to the 3.18-stable tree

Patch "of: fix of_device_get_modalias returned length when truncating buffers" has been added to the 3.18-stable tree

[gregkh]

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

    of: fix of_device_get_modalias returned length when truncating buffers

to the 3.18-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:
     of-fix-of_device_get_modalias-returned-length-when-truncating-buffers.patch
and it can be found in the queue-3.18 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 foo@baz Mon Mar 19 10:11:52 CET 2018
From: Rob Herring <robh@kernel.org>
Date: Mon, 16 Jan 2017 14:28:39 -0600
Subject: of: fix of_device_get_modalias returned length when truncating buffers

From: Rob Herring <robh@kernel.org>


[ Upstream commit bcf54d5385abaea9c8026aae6f4eeb348671a52d ]

If the length of the modalias is greater than the buffer size, then the
modalias is truncated. However the untruncated length is returned which
will cause an error. Fix this to return the truncated length. If an error
in the case was desired, then then we should just return -ENOMEM.

The reality is no device will ever have 4KB of compatible strings to hit
this case.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/of/device.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -126,7 +126,7 @@ ssize_t of_device_get_modalias(struct de
 			str[i] = '_';
 	}
 
-	return tsize;
+	return repend;
 }
 EXPORT_SYMBOL_GPL(of_device_get_modalias);
 


Patches currently in stable-queue which might be from robh@kernel.org are

queue-3.18/of-fix-of_device_get_modalias-returned-length-when-truncating-buffers.patch