linux-kernel - [PATCH] fpga: Fix memory leak in build_info_create

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Date:   Wed, 11 May 2022 10:44:00 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Wu Hao <hao.wu@...el.com>, Tom Rix <trix@...hat.com>,
        Moritz Fischer <mdf@...nel.org>, Xu Yilun <yilun.xu@...el.com>,
        Tim Whisonant <tim.whisonant@...el.com>,
        Enno Luebbers <enno.luebbers@...el.com>,
        Alan Tull <atull@...nel.org>, Shiva Rao <shiva.rao@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] fpga: Fix memory leak in build_info_create_dev

platform_device_alloc() create a platform device object.
we should call platform_device_put() in error path to
release the resource.

Fixes: 543be3d8c999 ("fpga: add device feature list support")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/fpga/dfl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index 599bb21d86af..f0b945bd975f 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -879,8 +879,10 @@ build_info_create_dev(struct build_feature_devs_info *binfo,
 	INIT_LIST_HEAD(&binfo->sub_features);
 
 	fdev->id = dfl_id_alloc(type, &fdev->dev);
-	if (fdev->id < 0)
+	if (fdev->id < 0) {
+		platform_device_put(fdev);
 		return fdev->id;
+	}
 
 	fdev->dev.parent = &binfo->cdev->region->dev;
 	fdev->dev.devt = dfl_get_devt(dfl_devs[type].devt_type, fdev->id);
-- 
2.25.1