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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Colin Ian King <colin.king@canonical.com>,
        Deepak Rawat <drawat@vmware.com>,
        Thomas Hellstrom <thellstrom@vmware.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.2 100/162] drm/vmwgfx: fix memory leak when too many retries have occurred
Date:   Tue, 27 Aug 2019 09:50:28 +0200
Message-Id: <20190827072741.727998111@linuxfoundation.org>
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[ Upstream commit 6b7c3b86f0b63134b2ab56508921a0853ffa687a ]

Currently when too many retries have occurred there is a memory
leak on the allocation for reply on the error return path. Fix
this by kfree'ing reply before returning.

Addresses-Coverity: ("Resource leak")
Fixes: a9cd9c044aa9 ("drm/vmwgfx: Add a check to handle host message failure")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_msg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
index e4e09d47c5c0e..59e9d05ab928b 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
@@ -389,8 +389,10 @@ static int vmw_recv_msg(struct rpc_channel *channel, void **msg,
 		break;
 	}
 
-	if (retries == RETRIES)
+	if (retries == RETRIES) {
+		kfree(reply);
 		return -EINVAL;
+	}
 
 	*msg_len = reply_len;
 	*msg     = reply;
-- 
2.20.1