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usb: dwc3: qcom: Fix potential memory leak 

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>
This commit is contained in:
Vladislav Efanov 2023-05-17 20:25:18 +03:00 committed by Greg Kroah-Hartman
parent c722576b24
commit 097fb3ee71
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/usb/dwc3/dwc3-qcom.c
View File

@ -791,6 +791,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
struct dwc3_qcom *qcom; struct dwc3_qcom *qcom;
struct resource *res, *parent_res = NULL; struct resource *res, *parent_res = NULL;
struct resource local_res;
int ret, i; int ret, i;
bool ignore_pipe_clk; bool ignore_pipe_clk;
bool wakeup_source; bool wakeup_source;
@ -842,9 +843,8 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
if (np) { if (np) {
parent_res = res; parent_res = res;
} else { } else {
parent_res = kmemdup(res, sizeof(struct resource), GFP_KERNEL); memcpy(&local_res, res, sizeof(struct resource));
if (!parent_res) parent_res = &local_res;
return -ENOMEM;
parent_res->start = res->start + parent_res->start = res->start +
qcom->acpi_pdata->qscratch_base_offset; qcom->acpi_pdata->qscratch_base_offset;