linux-kernel - [PATCH 0/3] Fix the NULL pointer deference issue in QMP USB drivers

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Message-Id: <20250825-qmp-null-deref-on-pm-v1-0-bbd3ca330849@oss.qualcomm.com>
Date: Mon, 25 Aug 2025 17:22:01 +0530
From: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
To: Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>,
        Poovendhan Selvaraj <quic_poovendh@...cinc.com>,
        stable@...r.kernel.org
Subject: [PATCH 0/3] Fix the NULL pointer deference issue in QMP USB
 drivers

In the suspend / resume callbacks, qmp->phy could be NULL because PHY is
created after the PM ops are enabled, which lead to the NULL pointer
deference.

Internally issue is reported on qcom-qmp-usb driver. Since the fix is
applicable to legacy and usbc drivers, incoporated the fixes for those
driver as well.

qcom-qmp-usb-legacy and qcom-qmp-usbc drivers are splitted out from
qcom-qmp-usb driver in v6.6 and v6.9 respectively. So splitted the
changes into 3, for ease of backporting.

Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
---
Poovendhan Selvaraj (3):
      phy: qcom-qmp-usb: fix NULL pointer dereference in PM callbacks
      phy: qcom-qmp-usb-legacy: fix NULL pointer dereference in PM callbacks
      phy: qcom-qmp-usbc: fix NULL pointer dereference in PM callbacks

 drivers/phy/qualcomm/phy-qcom-qmp-usb-legacy.c | 4 ++--
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c        | 4 ++--
 drivers/phy/qualcomm/phy-qcom-qmp-usbc.c       | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)
---
base-commit: 0f4c93f7eb861acab537dbe94441817a270537bf
change-id: 20250825-qmp-null-deref-on-pm-fd98a91c775b

Best regards,
-- 
Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>