linux-kernel - Re: [PATCH v2] Bluetooth: hci_qca: Bug fix during SSR timeout

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Date:   Wed, 10 Jun 2020 09:50:21 +0200
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Venkata Lakshmi Narayana Gubba <gubbaven@...eaurora.org>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Matthias Kaehlcke <mka@...omium.org>,
        open list <linux-kernel@...r.kernel.org>,
        Bluez mailing list <linux-bluetooth@...r.kernel.org>,
        Hemantg <hemantg@...eaurora.org>,
        MSM <linux-arm-msm@...r.kernel.org>,
        Balakrishna Godavarthi <bgodavar@...eaurora.org>,
        Rocky Liao <rjliao@...eaurora.org>, hbandi@...eaurora.org,
        abhishekpandit@...omium.org
Subject: Re: [PATCH v2] Bluetooth: hci_qca: Bug fix during SSR timeout

Hi Venkata,

> Due to race conditions between qca_hw_error and qca_controller_memdump
> during SSR timeout,the same pointer is freed twice. This results in a
> double free. Now a lock is acquired before checking the stauts of SSR
> state.
> 
> Fixes: d841502c79e3 ("Bluetooth: hci_qca: Collect controller memory dump during SSR")
> Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@...eaurora.org>
> ---
> drivers/bluetooth/hci_qca.c | 29 +++++++++++++++++------------
> 1 file changed, 17 insertions(+), 12 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel