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drm/rockchip: vop: fix possible null-ptr-deref in vop_bind()

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[ Upstream commit f8c242908a ]

It will cause null-ptr-deref in resource_size(), if platform_get_resource()
returns NULL, move calling resource_size() after devm_ioremap_resource() that
will check 'res' to avoid null-ptr-deref.

Fixes: 2048e3286f ("drm: rockchip: Add basic drm driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220422032854.2995175-1-yangyingliang@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-04-22 11:28:54 +08:00 committed by Greg Kroah-Hartman
parent 56cc614cc7
commit 769c53bb61
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/rockchip/rockchip_drm_vop.c
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@ -2118,10 +2118,10 @@ static int vop_bind(struct device *dev, struct device *master, void *data)
vop_win_init(vop);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
vop->len = resource_size(res);
vop->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(vop->regs))
return PTR_ERR(vop->regs);
vop->len = resource_size(res);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (res) {