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Date: Fri, 24 Jan 2020 10:30:54 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Jeffrey Hugo <jeffrey.l.hugo@...il.com>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Rob Clark <robdclark@...omium.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 236/343] drm/msm/mdp5: Fix mdp5_cfg_init error return
From: Jeffrey Hugo <jeffrey.l.hugo@...il.com>
[ Upstream commit fc19cbb785d7bbd1a1af26229b5240a3ab332744 ]
If mdp5_cfg_init fails because of an unknown major version, a null pointer
dereference occurs. This is because the caller of init expects error
pointers, but init returns NULL on error. Fix this by returning the
expected values on error.
Fixes: 2e362e1772b8 (drm/msm/mdp5: introduce mdp5_cfg module)
Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: Rob Clark <robdclark@...omium.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
index 824067d2d4277..42f0ecb0cf35f 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
@@ -635,7 +635,7 @@ fail:
if (cfg_handler)
mdp5_cfg_destroy(cfg_handler);
- return NULL;
+ return ERR_PTR(ret);
}
static struct mdp5_cfg_platform *mdp5_get_config(struct platform_device *dev)
--
2.20.1
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