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| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-04-22 11:28:54 +0800 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2022-05-02 23:22:05 +0200 |
| commit | f8c242908ad15bbd604d3bcb54961b7d454c43f8 (patch) | |
| tree | 81c4cc51b0370cae84b9364bc5fbd2fd411af1e2 | |
| parent | 6a47a16dcef3fdda79a95452964d001a620db473 (diff) | |
| download | linux-f8c242908ad15bbd604d3bcb54961b7d454c43f8.tar.bz2 | |
drm/rockchip: vop: fix possible null-ptr-deref in vop_bind()
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: 2048e3286f34 ("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
| -rw-r--r-- | drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index 3e8d9e2d1b67..d53037531f40 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -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) { |