[Freedreno] [PATCH] drm/msm: Fix potential invalid ptr free

[Rob Clark]

From: Rob Clark <robdcl...@chromium.org>

The error path cleanup expects that chain and syncobj are either NULL or
valid pointers.  But post_deps was not allocated with __GFP_ZERO.

Fixes: ab723b7a992a ("drm/msm: Add syncobj support.")
Signed-off-by: Rob Clark <robdcl...@chromium.org>
---
 drivers/gpu/drm/msm/msm_gem_submit.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c 
b/drivers/gpu/drm/msm/msm_gem_submit.c
index 6503220e5a4b..e4d13540300e 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -640,8 +640,8 @@ static struct msm_submit_post_dep 
*msm_parse_post_deps(struct drm_device *dev,
        int ret = 0;
        uint32_t i, j;
 
-       post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
-                                 GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
+       post_deps = kcalloc(nr_syncobjs, sizeof(*post_deps),
+                           GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
        if (!post_deps)
                return ERR_PTR(-ENOMEM);
 
@@ -656,7 +656,6 @@ static struct msm_submit_post_dep 
*msm_parse_post_deps(struct drm_device *dev,
                }
 
                post_deps[i].point = syncobj_desc.point;
-               post_deps[i].chain = NULL;
 
                if (syncobj_desc.flags) {
                        ret = -EINVAL;
-- 
2.39.1