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USB: host: isp116x: check return value after calling platform_get_resource()

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[ Upstream commit 134a3408c2 ]

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Signed-off-by: Zhen Ni <nizhen@uniontech.com>
Link: https://lore.kernel.org/r/20220302033716.31272-1-nizhen@uniontech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhen Ni 2022-03-02 11:37:16 +08:00 • committed by Greg Kroah-Hartman
commit ee105039d3
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/host/isp116x-hcd.c
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@ -1541,10 +1541,12 @@ static int isp116x_remove(struct platform_device *pdev)
iounmap(isp116x->data_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
release_mem_region(res->start, 2);
if (res)
release_mem_region(res->start, 2);
iounmap(isp116x->addr_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, 2);
if (res)
release_mem_region(res->start, 2);
usb_put_hcd(hcd);
return 0;