From: Bjorn Andersson <andersson@kernel.org>
To: Chris Lew <quic_clew@quicinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Bjorn Andersson <quic_bjorande@quicinc.com>
Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] soc: qcom: pd-mapper: Fix singleton refcount
Date: Wed, 21 Aug 2024 11:01:06 -0500 [thread overview]
Message-ID: <172425606114.1363342.17598413344783276376.b4-ty@kernel.org> (raw)
In-Reply-To: <20240820-pd-mapper-refcount-fix-v1-1-03ea65c0309b@quicinc.com>
On Tue, 20 Aug 2024 15:59:34 -0700, Bjorn Andersson wrote:
> The Qualcomm pd-mapper is a refcounted singleton, but the refcount is
> never incremented, which means the as soon as any remoteproc instance
> stops the count will hit 0.
>
> At this point the pd-mapper QMI service is stopped, leaving firmware
> without access to the PD information. Stopping any other remoteproc
> instances will result in a use-after-free, which best case manifest
> itself as a refcount underflow:
>
> [...]
Applied, thanks!
[1/1] soc: qcom: pd-mapper: Fix singleton refcount
commit: c158ceb826068a8bbe3c9e78df420f47ba53c8a8
Best regards,
--
Bjorn Andersson <andersson@kernel.org>
prev parent reply other threads:[~2024-08-21 16:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-20 22:59 Bjorn Andersson
2024-08-21 5:26 ` Dmitry Baryshkov
2024-08-21 16:01 ` Bjorn Andersson [this message]
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