kernel: backport NVMEM late fixes from v6.2

[openwrt/openwrt.git] / target / linux / generic / backport-5.10 / 812-v6.2-0007-nvmem-brcm_nvram-Add-check-for-kzalloc.patch

diff --git a/target/linux/generic/backport-5.10/812-v6.2-0007-nvmem-brcm_nvram-Add-check-for-kzalloc.patch b/target/linux/generic/backport-5.10/812-v6.2-0007-nvmem-brcm_nvram-Add-check-for-kzalloc.patch
new file mode 100644 (file)
index 0000000..14108b5
--- /dev/null
+++ b/target/linux/generic/backport-5.10/812-v6.2-0007-nvmem-brcm_nvram-Add-check-for-kzalloc.patch
@@ -0,0 +1,30 @@
+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';
+