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 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: bluetooth-btqcomsmd-fix-skb-double-free-corruption.patch and it can be found in the queue-4.9 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 14:40:24 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 @@ -85,7 +85,8 @@ 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-4.9/bluetooth-btqcomsmd-fix-skb-double-free-corruption.patch queue-4.9/bluetooth-hci_qca-avoid-setup-failure-on-missing-rampatch.patch