linux-kernel - [PATCH] net: brcmfmac: fix potential resource leak in brcmf_usb_probe

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Date:   Sun, 20 Nov 2022 18:38:07 +0800
From:   Jianglei Nie <niejianglei2021@....com>
To:     aspriel@...il.com, franky.lin@...adcom.com,
        hante.meuleman@...adcom.com, kvalo@...nel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        alsi@...g-olufsen.dk, rmk+kernel@...linux.org.uk,
        linus.walleij@...aro.org, marcan@...can.st
Cc:     linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jianglei Nie <niejianglei2021@....com>
Subject: [PATCH] net: brcmfmac: fix potential resource leak in brcmf_usb_probe_phase2()

brcmf_usb_probe_phase2() allocates resource for dev with brcmf_alloc().
The related resource should be released when the function gets some error.
But when brcmf_attach() fails, relevant resource is not released, which
will lead to resource leak.

Fix it by calling brcmf_free() when brcmf_attach() fails.

Signed-off-by: Jianglei Nie <niejianglei2021@....com>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
index 85e18fb9c497..5d8c12b2c4d7 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
@@ -1215,6 +1215,7 @@ static void brcmf_usb_probe_phase2(struct device *dev, int ret,
 	return;
 error:
 	brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
+	brcmf_free(devinfo->dev);
 	complete(&devinfo->dev_init_done);
 	device_release_driver(dev);
 }
-- 
2.25.1