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drm/msm: uninitialized variable in msm_gem_import()

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[ Upstream commit 2203bd0e5c12ffc53ffdd4fbd7b12d6ba27e0424 ]

The msm_gem_new_impl() function cleans up after itself so there is no
need to call drm_gem_object_put().  Conceptually, it does not make sense
to call a kref_put() function until after the reference counting has
been initialized which happens immediately after this call in the
drm_gem_(private_)object_init() functions.

In the msm_gem_import() function the "obj" pointer is uninitialized, so
it will lead to a crash.

Fixes: 05b849111c ("drm/msm: prime support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211013081315.GG6010@kili
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter
2021-10-13 11:13:15 +03:00
committed by Greg Kroah-Hartman
parent ba26680985
commit 96393660e2
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/msm/msm_gem.c
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@@ -871,7 +871,7 @@ struct drm_gem_object *msm_gem_new(struct drm_device *dev,
ret = msm_gem_new_impl(dev, size, flags, NULL, &obj);
if (ret)
goto fail;
return ERR_PTR(ret);
if (use_pages(obj)) {
ret = drm_gem_object_init(dev, obj, size);
@@ -910,7 +910,7 @@ struct drm_gem_object *msm_gem_import(struct drm_device *dev,
mutex_unlock(&dev->struct_mutex);
if (ret)
goto fail;
return ERR_PTR(ret);
drm_gem_private_object_init(dev, obj, size);