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

   1 From b0576ade3aaf24b376ea1a4406ae138e2a22b0c0 Mon Sep 17 00:00:00 2001
   2 From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
   3 Date: Fri, 27 Jan 2023 10:40:06 +0000
   4 Subject: [PATCH] nvmem: brcm_nvram: Add check for kzalloc
   5
   6 Add the check for the return value of kzalloc in order to avoid
   7 NULL pointer dereference.
   8
   9 Fixes: 6e977eaa8280 ("nvmem: brcm_nvram: parse NVRAM content into NVMEM cells")
  10 Cc: stable@vger.kernel.org
  11 Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
  12 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
  13 Link: https://lore.kernel.org/r/20230127104015.23839-2-srinivas.kandagatla@linaro.org
  14 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  15 ---
  16  drivers/nvmem/brcm_nvram.c | 3 +++
  17  1 file changed, 3 insertions(+)
  18
  19 --- a/drivers/nvmem/brcm_nvram.c
  20 +++ b/drivers/nvmem/brcm_nvram.c
  21 @@ -97,6 +97,9 @@ static int brcm_nvram_parse(struct brcm_
  22         len = le32_to_cpu(header.len);
  23
  24         data = kzalloc(len, GFP_KERNEL);
  25 +       if (!data)
  26 +               return -ENOMEM;
  27 +
  28         memcpy_fromio(data, priv->base, len);
  29         data[len - 1] = '\0';
  30