linux-kernel - [PATCH] brcmfmac: check the return value of devm_kzalloc() in brcmf_of

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Message-Id: <20220225132138.27722-1-baijiaju1990@gmail.com>
Date:   Fri, 25 Feb 2022 05:21:38 -0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     aspriel@...il.com, franky.lin@...adcom.com,
        hante.meuleman@...adcom.com, chi-hsien.lin@...ineon.com,
        wright.feng@...ineon.com, chung-hsien.hsu@...ineon.com,
        kvalo@...nel.org, davem@...emloft.net, kuba@...nel.org,
        shawn.guo@...aro.org, gustavoars@...nel.org, len.baker@....com
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, Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] brcmfmac: check the return value of devm_kzalloc() in brcmf_of_probe()

The function devm_kzalloc() in brcmf_of_probe() can fail, so its return
value should be checked.

Fixes: 29e354ebeeec ("brcmfmac: Transform compatible string for FW loading")
Reported-by: TOTE Robot <oslab@...nghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
index 513c7e6421b2..535e8ddeab8d 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
@@ -80,6 +80,8 @@ void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
 		/* get rid of '/' in the compatible string to be able to find the FW */
 		len = strlen(tmp) + 1;
 		board_type = devm_kzalloc(dev, len, GFP_KERNEL);
+		if (!board_type)
+			return;
 		strscpy(board_type, tmp, len);
 		for (i = 0; i < board_type[i]; i++) {
 			if (board_type[i] == '/')
-- 
2.17.1