linux-kernel - [PATCH net-next] brcm80211: fix possible memleak in brcmf_proto_msgbuf

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Date:   Mon, 20 Jul 2020 17:33:28 +0800
From:   Wang Yufen <wangyufen@...wei.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <brcm80211-dev-list@...ress.com>, <linux-wireless@...r.kernel.org>,
        <davem@...emloft.net>, <kvalo@...eaurora.org>, <kuba@...nel.org>,
        <franky.lin@...adcom.com>, <wright.feng@...ress.com>
CC:     Wang Yufen <wangyufen@...wei.com>
Subject: [PATCH net-next] brcm80211: fix possible memleak in brcmf_proto_msgbuf_attach

When brcmf_proto_msgbuf_attach fail and msgbuf->txflow_wq != NULL,
we should destroy the workqueue.

Fixes: 05491d2ccf20 ("brcm80211: move under broadcom vendor directory")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wang Yufen <wangyufen@...wei.com>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c
index 8bb4f1f..1bb270e 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c
@@ -1619,6 +1619,8 @@ int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr)
 					  BRCMF_TX_IOCTL_MAX_MSG_SIZE,
 					  msgbuf->ioctbuf,
 					  msgbuf->ioctbuf_handle);
+		if (msgbuf->txflow_wq)
+			destroy_workqueue(msgbuf->txflow_wq);
 		kfree(msgbuf);
 	}
 	return -ENOMEM;
-- 
1.8.3