Patch "Bluetooth: btqcomsmd: Fix skb double free corruption" has been added to the 4.14-stable tree

Patch "Bluetooth: btqcomsmd: Fix skb double free corruption" has been added to the 4.14-stable tree

[gregkh]

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

    Bluetooth: btqcomsmd: Fix skb double free corruption

to the 4.14-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:
     bluetooth-btqcomsmd-fix-skb-double-free-corruption.patch
and it can be found in the queue-4.14 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 Thu Mar 22 14:26:48 CET 2018
From: Loic Poulain <loic.poulain@linaro.org>
Date: Wed, 22 Nov 2017 15:03:17 +0100
Subject: Bluetooth: btqcomsmd: Fix skb double free corruption

From: Loic Poulain <loic.poulain@linaro.org>


[ Upstream commit 67b8fbead4685b36d290a0ef91c6ddffc4920ec9 ]

In case of hci send frame failure, skb is still owned
by the caller (hci_core) and then should not be freed.

This fixes crash on dragonboard-410c when sending SCO
packet. skb is freed by both btqcomsmd and hci_core.

Fixes: 1511cc750c3d ("Bluetooth: Introduce Qualcomm WCNSS SMD based HCI driver")
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/bluetooth/btqcomsmd.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/bluetooth/btqcomsmd.c
+++ b/drivers/bluetooth/btqcomsmd.c
@@ -86,7 +86,8 @@ static int btqcomsmd_send(struct hci_dev
 		break;
 	}
 
-	kfree_skb(skb);
+	if (!ret)
+		kfree_skb(skb);
 
 	return ret;
 }


Patches currently in stable-queue which might be from loic.poulain@linaro.org are

queue-4.14/bluetooth-btqcomsmd-fix-skb-double-free-corruption.patch
queue-4.14/bluetooth-hci_qca-avoid-setup-failure-on-missing-rampatch.patch