[PATCH AUTOSEL 4.19 7/7] drm/exynos: fix a potential error pointer dereference
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DORMANTno replies
From: Sasha Levin <sashal@kernel.org>
Date: 2023-12-11 14:26:51
Also in:
dri-devel, linux-samsung-soc, lkml, stable
Subsystem:
drm drivers, drm drivers for exynos, the rest · Maintainers:
David Airlie, Simona Vetter, Inki Dae, Seung-Woo Kim, Kyungmin Park, Linus Torvalds
From: Xiang Yang <redacted> [ Upstream commit 73bf1c9ae6c054c53b8e84452c5e46f86dd28246 ] Smatch reports the warning below: drivers/gpu/drm/exynos/exynos_hdmi.c:1864 hdmi_bind() error: 'crtc' dereferencing possible ERR_PTR() The return value of exynos_drm_crtc_get_by_type maybe ERR_PTR(-ENODEV), which can not be used directly. Fix this by checking the return value before using it. Signed-off-by: Xiang Yang <redacted> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/gpu/drm/exynos/exynos_hdmi.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 2092a650df7d5..551a97e45d973 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c@@ -1840,6 +1840,8 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data) return ret; crtc = exynos_drm_crtc_get_by_type(drm_dev, EXYNOS_DISPLAY_TYPE_HDMI); + if (IS_ERR(crtc)) + return PTR_ERR(crtc); crtc->pipe_clk = &hdata->phy_clk; ret = hdmi_create_connector(encoder);
--
2.42.0
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