linux-kernel - Re: [PATCH v2 0/3] soc: qcom: pmic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZsRB8fk1_P7XPtQS@hovoldconsulting.com>
Date: Tue, 20 Aug 2024 09:12:49 +0200
From: Johan Hovold <johan@...nel.org>
To: Bjorn Andersson <quic_bjorande@...cinc.com>
Cc: Sebastian Reichel <sre@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Johan Hovold <johan+linaro@...nel.org>,
	Chris Lew <quic_clew@...cinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Stephen Boyd <swboyd@...omium.org>,
	Amit Pundir <amit.pundir@...aro.org>, linux-arm-msm@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v2 0/3] soc: qcom: pmic_glink: v6.11-rc bug fixes

On Mon, Aug 19, 2024 at 01:07:44PM -0700, Bjorn Andersson wrote:
> Amit and Johan both reported a NULL pointer dereference in the
> pmic_glink client code during initialization, and Stephen Boyd pointed
> out the problem (race condition).
> 
> While investigating, and writing the fix, I noticed that
> ucsi_unregister() is called in atomic context but tries to sleep, and I
> also noticed that the condition for when to inform the pmic_glink client
> drivers when the remote has gone down is just wrong.
> 
> So, let's fix all three.

> Changes in v2:
> - Refer to the correct commit in the ucsi_unregister() patch.
> - Updated wording in the same commit message about the new error message
>   in the log.
> - Changed the data type of the introduced state variables, opted to go
>   for a bool as we only represent two states (and I would like to
>   further clean this up going forward)
> - Initialized the spinlock
> - Link to v1: https://lore.kernel.org/r/20240818-pmic-glink-v6-11-races-v1-0-f87c577e0bc9@quicinc.com
> 
> ---
> Bjorn Andersson (3):
>       soc: qcom: pmic_glink: Fix race during initialization
>       usb: typec: ucsi: Move unregister out of atomic section
>       soc: qcom: pmic_glink: Actually communicate with remote goes down

Tested-by: Johan Hovold <johan+linaro@...nel.org>