Received-SPF: pass (google.com: domain of linux-kernel+bounces-114828-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Zhipeng Lu <alexious@zju.edu.cn>,
	Zack Rusin <zack.rusin@broadcom.com>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.15 169/317] drm/vmwgfx: fix a memleak in vmw_gmrid_man_get_node
Date: Sun, 24 Mar 2024 19:32:29 -0400
Message-ID: <20240324233458.1352854-170-sashal@kernel.org>
In-Reply-To: <20240324233458.1352854-1-sashal@kernel.org>
References: <20240324233458.1352854-1-sashal@kernel.org>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

From: Zhipeng Lu <alexious@zju.edu.cn>

[ Upstream commit 89709105a6091948ffb6ec2427954cbfe45358ce ]

When ida_alloc_max fails, resources allocated before should be freed,
including *res allocated by kmalloc and ttm_resource_init.

Fixes: d3bcb4b02fe9 ("drm/vmwgfx: switch the TTM backends to self alloc")
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231204091416.3308430-1-alexious@zju.edu.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
index bfd686bb8d194..eef7bab8bc3a6 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
@@ -64,8 +64,11 @@ static int vmw_gmrid_man_get_node(struct ttm_resource_manager *man,
 	ttm_resource_init(bo, place, *res);
 
 	id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
-	if (id < 0)
+	if (id < 0) {
+		ttm_resource_fini(man, *res);
+		kfree(*res);
 		return id;
+	}
 
 	spin_lock(&gman->lock);
 
-- 
2.43.0