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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Bernard Zhao <bernard@vivo.com>,
        Rob Clark <robdclark@chromium.org>,
        Sasha Levin <sashal@kernel.org>, linux-arm-msm@vger.kernel.org,
        dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org
Subject: [PATCH AUTOSEL 5.7 01/30] drm/msm: fix potential memleak in error branch
Date:   Wed,  8 Jul 2020 11:40:47 -0400
Message-Id: <20200708154116.3199728-1-sashal@kernel.org>
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From: Bernard Zhao <bernard@vivo.com>

[ Upstream commit 177d3819633cd520e3f95df541a04644aab4c657 ]

In function msm_submitqueue_create, the queue is a local
variable, in return -EINVAL branch, queue didn`t add to ctx`s
list yet, and also didn`t kfree, this maybe bring in potential
memleak.

Signed-off-by: Bernard Zhao <bernard@vivo.com>
[trivial commit msg fixup]
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/msm/msm_submitqueue.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_submitqueue.c b/drivers/gpu/drm/msm/msm_submitqueue.c
index 001fbf537440a..a1d94be7883a0 100644
--- a/drivers/gpu/drm/msm/msm_submitqueue.c
+++ b/drivers/gpu/drm/msm/msm_submitqueue.c
@@ -71,8 +71,10 @@ int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
 	queue->flags = flags;
 
 	if (priv->gpu) {
-		if (prio >= priv->gpu->nr_rings)
+		if (prio >= priv->gpu->nr_rings) {
+			kfree(queue);
 			return -EINVAL;
+		}
 
 		queue->prio = prio;
 	}
-- 
2.25.1