linux-kernel - [PATCH] staging: r8188eu: fix a potential memory leak in _rtw_init_cmd

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Date:   Wed, 30 Mar 2022 19:32:21 +0800
From:   xkernel.wang@...mail.com
To:     Larry.Finger@...inger.net, phil@...lpotter.co.uk,
        gregkh@...uxfoundation.org
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Xiaoke Wang <xkernel.wang@...mail.com>
Subject: [PATCH] staging: r8188eu: fix a potential memory leak in _rtw_init_cmd_priv()

From: Xiaoke Wang <xkernel.wang@...mail.com>

In _rtw_init_cmd_priv(), if `pcmdpriv->rsp_allocated_buf` is allocated
in failure, `pcmdpriv->cmd_allocated_buf` is not properly released.
This patch is to free it.

Signed-off-by: Xiaoke Wang <xkernel.wang@...mail.com>
---
 drivers/staging/r8188eu/core/rtw_cmd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/r8188eu/core/rtw_cmd.c b/drivers/staging/r8188eu/core/rtw_cmd.c
index 56910c3..e76015e 100644
--- a/drivers/staging/r8188eu/core/rtw_cmd.c
+++ b/drivers/staging/r8188eu/core/rtw_cmd.c
@@ -42,6 +42,8 @@ static int _rtw_init_cmd_priv(struct cmd_priv *pcmdpriv)
 	pcmdpriv->rsp_allocated_buf = kzalloc(MAX_RSPSZ + 4, GFP_KERNEL);
 
 	if (!pcmdpriv->rsp_allocated_buf) {
+		kfree(pcmdpriv->cmd_allocated_buf);
+		pcmdpriv->cmd_allocated_buf = NULL;
 		res = _FAIL;
 		goto exit;
 	}
--