openwrt/target/linux/generic/backport-5.15/808-v6.2-0007-nvmem-brcm_nvram-Add-check-for-kzalloc.patch

From b0576ade3aaf24b376ea1a4406ae138e2a22b0c0 Mon Sep 17 00:00:00 2001
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Fri, 27 Jan 2023 10:40:06 +0000
Subject: [PATCH] nvmem: brcm_nvram: Add check for kzalloc

Add the check for the return value of kzalloc in order to avoid
NULL pointer dereference.

Fixes: 6e977eaa8280 ("nvmem: brcm_nvram: parse NVRAM content into NVMEM cells")
Cc: stable@vger.kernel.org
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230127104015.23839-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/nvmem/brcm_nvram.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/nvmem/brcm_nvram.c
+++ b/drivers/nvmem/brcm_nvram.c
@@ -97,6 +97,9 @@ static int brcm_nvram_parse(struct brcm_
 	len = le32_to_cpu(header.len);
 
 	data = kzalloc(len, GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
 	memcpy_fromio(data, priv->base, len);
 	data[len - 1] = '\0';