linux-kernel - [PATCH] usb: cdnsp: Fix potential memory leak in cdnsp_alloc_stream

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Date:   Wed,  7 Sep 2022 15:58:35 +0800
From:   Jianglei Nie <niejianglei2021@....com>
To:     pawell@...ence.com, gregkh@...uxfoundation.org
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jianglei Nie <niejianglei2021@....com>
Subject: [PATCH] usb: cdnsp: Fix potential memory leak in cdnsp_alloc_stream_info()

cdnsp_alloc_stream_info() allocates stream context array for stream_info
->stream_ctx_array with cdnsp_alloc_stream_ctx(). When some error occurs,
stream_info->stream_ctx_array is not released, which will lead to a
memory leak.

We can fix it by releasing the stream_info->stream_ctx_array with
cdnsp_free_stream_ctx() on the error path to avoid the potential memory
leak.

Signed-off-by: Jianglei Nie <niejianglei2021@....com>
---
 drivers/usb/cdns3/cdnsp-mem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/cdns3/cdnsp-mem.c b/drivers/usb/cdns3/cdnsp-mem.c
index 97866bfb2da9..319037848151 100644
--- a/drivers/usb/cdns3/cdnsp-mem.c
+++ b/drivers/usb/cdns3/cdnsp-mem.c
@@ -631,6 +631,7 @@ int cdnsp_alloc_stream_info(struct cdnsp_device *pdev,
 			stream_info->stream_rings[cur_stream] = NULL;
 		}
 	}
+	cdnsp_free_stream_ctx(pdev, pep);
 
 cleanup_stream_rings:
 	kfree(pep->stream_info.stream_rings);
-- 
2.25.1