From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To: Johan Hovold <johan+linaro@kernel.org>,
Amol Maheshwari <amahesh@qti.qualcomm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Arnd Bergmann <arnd@arndb.de>,
Bjorn Andersson <andersson@kernel.org>,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] misc: fastrpc: fix memory corruption
Date: Fri, 2 Sep 2022 11:02:35 +0100 [thread overview]
Message-ID: <01bdf6e2-f72a-e114-f3d2-deccf55403b1@linaro.org> (raw)
In-Reply-To: <20220829080531.29681-1-johan+linaro@kernel.org>
Hi Johan,
On 29/08/2022 09:05, Johan Hovold wrote:
> The fastrpc driver uses a fixed-sized array to store its sessions but
> missing and broken sanity checks could lead to memory beyond the array
> being corrupted.
>
> This specifically happens on SC8280XP platforms that use 14 sessions for
> the compute DSP.
>
Thanks for doing this.
I see that we hit this issue once again, and the way we are fixing it is
not really scalable. We should really get rid of FASTRPC_MAX_SESSIONS.
We should allocate the sessions dynamically based in the child node
count and qcom,nsessions.
thanks,
Srini
> These are all needed for 6.0.
>
> Johan
>
>
> Johan Hovold (3):
> misc: fastrpc: fix memory corruption on probe
> misc: fastrpc: fix memory corruption on open
> misc: fastrpc: increase maximum session count
>
> drivers/misc/fastrpc.c | 14 +++++++++-----
> 1 file changed, 9 insertions(+), 5 deletions(-)
>
next prev parent reply other threads:[~2022-09-02 10:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-29 8:05 [PATCH 0/3] misc: fastrpc: fix memory corruption Johan Hovold
2022-08-29 8:05 ` [PATCH 1/3] misc: fastrpc: fix memory corruption on probe Johan Hovold
2022-08-29 8:05 ` [PATCH 2/3] misc: fastrpc: fix memory corruption on open Johan Hovold
2022-08-29 8:05 ` [PATCH 3/3] misc: fastrpc: increase maximum session count Johan Hovold
2022-09-02 10:02 ` Srinivas Kandagatla [this message]
2022-09-02 12:28 ` [PATCH 0/3] misc: fastrpc: fix memory corruption Johan Hovold
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