From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
linux-tegra@vger.kernel.org, Thierry Reding <treding@nvidia.com>,
dri-devel@lists.freedesktop.org
Subject: [PATCH AUTOSEL 5.0 49/98] drm/tegra: hub: Fix dereference before check
Date: Mon, 22 Apr 2019 15:41:16 -0400 [thread overview]
Message-ID: <20190422194205.10404-49-sashal@kernel.org> (raw)
In-Reply-To: <20190422194205.10404-1-sashal@kernel.org>
From: Thierry Reding <treding@nvidia.com>
[ Upstream commit 7cf77b273a8fc51e7de622fa6691abd4436a9a6b ]
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
---
drivers/gpu/drm/tegra/hub.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index 922a48d5a483..c7c612579270 100644
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -378,14 +378,16 @@ static int tegra_shared_plane_atomic_check(struct drm_plane *plane,
static void tegra_shared_plane_atomic_disable(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
- struct tegra_dc *dc = to_tegra_dc(old_state->crtc);
struct tegra_plane *p = to_tegra_plane(plane);
+ struct tegra_dc *dc;
u32 value;
/* rien ne va plus */
if (!old_state || !old_state->crtc)
return;
+ dc = to_tegra_dc(old_state->crtc);
+
/*
* XXX Legacy helpers seem to sometimes call ->atomic_disable() even
* on planes that are already disabled. Make sure we fallback to the
--
2.19.1
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next parent reply other threads:[~2019-04-22 19:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190422194205.10404-1-sashal@kernel.org>
2019-04-22 19:41 ` Sasha Levin [this message]
2019-04-22 19:41 ` [PATCH AUTOSEL 5.0 54/98] drm: Fix drm_release() and device unplug Sasha Levin
2019-04-22 19:41 ` [PATCH AUTOSEL 5.0 56/98] drm/meson: Fix invalid pointer in meson_drv_unbind() Sasha Levin
2019-04-22 19:41 ` [PATCH AUTOSEL 5.0 57/98] drm/meson: Uninstall IRQ handler Sasha Levin
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