Patch "rsi: Fix possible leak when loading firmware" has been added to the 4.2-stable tree

Patch "rsi: Fix possible leak when loading firmware" has been added to the 4.2-stable tree

[gregkh]

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

    rsi: Fix possible leak when loading firmware

to the 4.2-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:
     rsi-fix-possible-leak-when-loading-firmware.patch
and it can be found in the queue-4.2 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 a8b9774571d46506a0774b1ced3493b1245cf893 Mon Sep 17 00:00:00 2001
From: Christian Engelmayer <cengelma@gmx.at>
Date: Fri, 21 Aug 2015 23:14:26 +0200
Subject: rsi: Fix possible leak when loading firmware

From: Christian Engelmayer <cengelma@gmx.at>

commit a8b9774571d46506a0774b1ced3493b1245cf893 upstream.

Commit 5d5cd85ff441 ("rsi: Fix failure to load firmware after memory
leak fix and fix the leak") also added a check on the allocation of
DMA-accessible memory that may directly return. In that case the
already allocated firmware data is leaked. Make sure the data is
always freed correctly. Detected by Coverity CID 1316519.

Fixes: 5d5cd85ff441 ("rsi: Fix failure to load firmware after memory leak fix and fix the leak")
Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/rsi/rsi_91x_sdio_ops.c |    8 ++++++--
 drivers/net/wireless/rsi/rsi_91x_usb_ops.c  |    8 ++++++--
 2 files changed, 12 insertions(+), 4 deletions(-)

--- a/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c
+++ b/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c
@@ -203,8 +203,10 @@ static int rsi_load_ta_instructions(stru
 
 	/* Copy firmware into DMA-accessible memory */
 	fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
-	if (!fw)
-		return -ENOMEM;
+	if (!fw) {
+		status = -ENOMEM;
+		goto out;
+	}
 	len = fw_entry->size;
 
 	if (len % 4)
@@ -217,6 +219,8 @@ static int rsi_load_ta_instructions(stru
 
 	status = rsi_copy_to_card(common, fw, len, num_blocks);
 	kfree(fw);
+
+out:
 	release_firmware(fw_entry);
 	return status;
 }
--- a/drivers/net/wireless/rsi/rsi_91x_usb_ops.c
+++ b/drivers/net/wireless/rsi/rsi_91x_usb_ops.c
@@ -148,8 +148,10 @@ static int rsi_load_ta_instructions(stru
 
 	/* Copy firmware into DMA-accessible memory */
 	fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
-	if (!fw)
-		return -ENOMEM;
+	if (!fw) {
+		status = -ENOMEM;
+		goto out;
+	}
 	len = fw_entry->size;
 
 	if (len % 4)
@@ -162,6 +164,8 @@ static int rsi_load_ta_instructions(stru
 
 	status = rsi_copy_to_card(common, fw, len, num_blocks);
 	kfree(fw);
+
+out:
 	release_firmware(fw_entry);
 	return status;
 }


Patches currently in stable-queue which might be from cengelma@gmx.at are

queue-4.2/rsi-fix-possible-leak-when-loading-firmware.patch