linux-kernel - [PATCH v2 1/6] phy: qcom-qmp-combo: fix out-of-bounds clock access

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Message-Id: <20221114081346.5116-2-johan+linaro@kernel.org>
Date:   Mon, 14 Nov 2022 09:13:41 +0100
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>, stable@...r.kernel.org
Subject: [PATCH v2 1/6] phy: qcom-qmp-combo: fix out-of-bounds clock access

The SM8250 only uses three clocks but the DP configuration erroneously
described four clocks.

In case the DP part of the PHY is initialised before the USB part, this
would lead to uninitialised memory beyond the bulk-clocks array to be
treated as a clock pointer as the clocks are requested based on the USB
configuration.

Fixes: aff188feb5e1 ("phy: qcom-qmp: add support for sm8250-usb3-dp phy")
Cc: stable@...r.kernel.org	# 5.13
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 5e11b6a1d189..bb38b18258ca 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -1270,8 +1270,8 @@ static const struct qmp_phy_cfg sm8250_dpphy_cfg = {
 	.swing_hbr3_hbr2	= &qmp_dp_v3_voltage_swing_hbr3_hbr2,
 	.pre_emphasis_hbr3_hbr2 = &qmp_dp_v3_pre_emphasis_hbr3_hbr2,
 
-	.clk_list		= qmp_v4_phy_clk_l,
-	.num_clks		= ARRAY_SIZE(qmp_v4_phy_clk_l),
+	.clk_list		= qmp_v4_sm8250_usbphy_clk_l,
+	.num_clks		= ARRAY_SIZE(qmp_v4_sm8250_usbphy_clk_l),
 	.reset_list		= msm8996_usb3phy_reset_l,
 	.num_resets		= ARRAY_SIZE(msm8996_usb3phy_reset_l),
 	.vreg_list		= qmp_phy_vreg_l,
-- 
2.37.4