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usb: dwc3: qcom: Fix potential memory leak

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[ Upstream commit 097fb3ee710d4de83b8d4f5589e8ee13e0f0541e ]

Function dwc3_qcom_probe() allocates memory for resource structure
which is pointed by parent_res pointer. This memory is not
freed. This leads to memory leak. Use stack memory to prevent
memory leak.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 2bc02355f8 ("usb: dwc3: qcom: Add support for booting with ACPI")
Signed-off-by: Vladislav Efanov <VEfanov@ispras.ru>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Link: https://lore.kernel.org/r/20230517172518.442591-1-VEfanov@ispras.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Vladislav Efanov 2023-05-17 20:25:18 +03:00 committed by Greg Kroah-Hartman
parent bdce16c1e6
commit 74f8606ddf
1 changed files with 3 additions and 3 deletions
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6
drivers/usb/dwc3/dwc3-qcom.c
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@ -722,6 +722,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct dwc3_qcom *qcom;
struct resource *res, *parent_res = NULL;
struct resource local_res;
int ret, i;
bool ignore_pipe_clk;
@ -772,9 +773,8 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
if (np) {
parent_res = res;
} else {
parent_res = kmemdup(res, sizeof(struct resource), GFP_KERNEL);
if (!parent_res)
return -ENOMEM;
memcpy(&local_res, res, sizeof(struct resource));
parent_res = &local_res;
parent_res->start = res->start +
qcom->acpi_pdata->qscratch_base_offset;