linux-kernel - [PATCH AUTOSEL 4.4 071/100] drm/vmwgfx: prevent memory leak in vmw_cmdbuf_res

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Message-Id: <20200214162425.21071-71-sashal@kernel.org>
Date:   Fri, 14 Feb 2020 11:23:55 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Navid Emamdoost <navid.emamdoost@...il.com>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Sasha Levin <sashal@...nel.org>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 4.4 071/100] drm/vmwgfx: prevent memory leak in vmw_cmdbuf_res_add

From: Navid Emamdoost <navid.emamdoost@...il.com>

[ Upstream commit 40efb09a7f53125719e49864da008495e39aaa1e ]

In vmw_cmdbuf_res_add if drm_ht_insert_item fails the allocated memory
for cres should be released.

Fixes: 18e4a4669c50 ("drm/vmwgfx: Fix compat shader namespace")
Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
Reviewed-by: Thomas Hellstrom <thellstrom@...are.com>
Signed-off-by: Thomas Hellstrom <thellstrom@...are.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf_res.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf_res.c b/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf_res.c
index 1f013d45c9e9a..0c7c3005594cc 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf_res.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf_res.c
@@ -210,8 +210,10 @@ int vmw_cmdbuf_res_add(struct vmw_cmdbuf_res_manager *man,
 
 	cres->hash.key = user_key | (res_type << 24);
 	ret = drm_ht_insert_item(&man->resources, &cres->hash);
-	if (unlikely(ret != 0))
+	if (unlikely(ret != 0)) {
+		kfree(cres);
 		goto out_invalid_key;
+	}
 
 	cres->state = VMW_CMDBUF_RES_ADD;
 	cres->res = vmw_resource_reference(res);
-- 
2.20.1