From: Lee Jones <lee.jones@linaro.org>
To: alokc@codeaurora.org, agross@kernel.org, david.brown@linaro.org,
wsa+renesas@sang-engineering.com, bjorn.andersson@linaro.org,
balbi@kernel.org, gregkh@linuxfoundation.org,
ard.biesheuvel@linaro.org, jlhugo@gmail.com
Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org,
Lee Jones <lee.jones@linaro.org>,
linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.or
Subject: [PATCH v4 6/6] usb: dwc3: qcom: Improve error handling
Date: Wed, 12 Jun 2019 15:26:54 +0100 [thread overview]
Message-ID: <20190612142654.9639-7-lee.jones@linaro.org> (raw)
In-Reply-To: <20190612142654.9639-1-lee.jones@linaro.org>
dwc3_qcom_clk_init() is called with of_count_phandle_with_args() as an
argument. If of_count_phandle_with_args() returns an error, the number
of clocks will be a negative value and will lead to undefined behaviour.
Ensure we check for an error before attempting to blindly use the value.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
drivers/usb/dwc3/dwc3-qcom.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 55ba04254e38..e4dac82abd7d 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -409,6 +409,9 @@ static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count)
if (!np || !count)
return 0;
+ if (count < 0)
+ return count;
+
qcom->num_clocks = count;
qcom->clks = devm_kcalloc(dev, qcom->num_clocks,
--
2.17.1
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prev parent reply other threads:[~2019-06-12 14:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-12 14:26 [PATCH v4 0/6] I2C: DWC3 USB: Add support for ACPI based AArch64 Laptops Lee Jones
2019-06-12 14:26 ` [PATCH v4 1/6] i2c: i2c-qcom-geni: Provide support for ACPI Lee Jones
2019-06-14 21:17 ` Wolfram Sang
2019-06-12 14:26 ` [PATCH v4 2/6] i2c: i2c-qcom-geni: Signify successful driver probe Lee Jones
2019-06-14 21:17 ` Wolfram Sang
2019-06-12 14:26 ` [PATCH v4 3/6] soc: qcom: geni: Add support for ACPI Lee Jones
2019-06-17 10:14 ` Lee Jones
2019-06-19 5:43 ` Bjorn Andersson
2019-06-12 14:26 ` [PATCH v4 4/6] usb: dwc3: qcom: Add support for booting with ACPI Lee Jones
2019-06-17 10:21 ` Lee Jones
2019-06-17 12:32 ` Felipe Balbi
2019-06-17 12:43 ` Lee Jones
2019-06-17 12:45 ` Felipe Balbi
2019-06-12 14:26 ` [PATCH v4 5/6] usb: dwc3: qcom: Start USB in 'host mode' on the SDM845 Lee Jones
2019-06-12 14:26 ` Lee Jones [this message]
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