From: Johan Hovold <johan@kernel.org>
To: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
Bjorn Andersson <andersson@kernel.org>,
Maximilian Luz <luzmaximilian@gmail.com>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH v2 2/4] firmware: qcom: uefisecapp: add support for R/O UEFI vars
Date: Mon, 23 Jun 2025 16:52:08 +0200 [thread overview]
Message-ID: <aFlqGMWwx8ID_SaN@hovoldconsulting.com> (raw)
In-Reply-To: <2a37d3f0-a3f4-444d-8166-f85888a27308@oss.qualcomm.com>
On Mon, Jun 23, 2025 at 04:49:22PM +0200, Konrad Dybcio wrote:
> On 6/23/25 4:45 PM, Johan Hovold wrote:
> > It looks like the efivars implementation does not support read-only
> > efivars and this will lead to NULL pointer dereferences whenever you try
> > to write a variable.
>
> There's efivar_supports_writes() that is used to set the EFIVAR_OPS_RDONLY
> flag which then sets SB_RDONLY on all efivarfs superblocks
Yep, but it doesn't help when attempting to store the RTC offset from
the kernel (since that does not use efivarfs).
Johan
next prev parent reply other threads:[~2025-06-23 14:52 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-21 19:56 [PATCH v2 0/4] firmware: qcom: enable UEFI variables on Lenovo Yoga C630 Dmitry Baryshkov
2025-06-21 19:56 ` [PATCH v2 1/4] firmware: qcom: scm: allow specifying quirks for QSEECOM implementations Dmitry Baryshkov
2025-06-23 10:33 ` Konrad Dybcio
2025-06-21 19:56 ` [PATCH v2 2/4] firmware: qcom: uefisecapp: add support for R/O UEFI vars Dmitry Baryshkov
2025-06-23 14:45 ` Johan Hovold
2025-06-23 14:49 ` Konrad Dybcio
2025-06-23 14:52 ` Johan Hovold [this message]
2025-06-23 14:52 ` Konrad Dybcio
2025-06-23 14:50 ` Johan Hovold
2025-06-24 1:13 ` Dmitry Baryshkov
2025-06-26 9:42 ` Johan Hovold
2025-06-26 11:15 ` Dmitry Baryshkov
2025-06-26 13:13 ` Johan Hovold
2025-06-26 13:49 ` Konrad Dybcio
2025-06-26 14:07 ` Johan Hovold
2025-06-26 23:09 ` Dmitry Baryshkov
2025-06-27 12:16 ` Johan Hovold
2025-06-21 19:56 ` [PATCH v2 3/4] firmware: qcom: enable QSEECOM on Lenovo Yoga C630 Dmitry Baryshkov
2025-06-23 10:36 ` Konrad Dybcio
2025-06-21 19:56 ` [PATCH v2 4/4] arm64: dts: qcom: sdm850-lenovo-yoga-c630: fix RTC offset info Dmitry Baryshkov
2025-06-23 10:36 ` Konrad Dybcio
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