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proc: bootconfig: Add null pointer check

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commit bed5b60bf67ccd8957b8c0558fead30c4a3f5d3f upstream.

kzalloc is a memory allocation function which can return NULL when some
internal memory errors happen. It is safer to add null pointer check.

Link: https://lkml.kernel.org/r/20220329104004.2376879-1-lv.ruyi@zte.com.cn

Cc: stable@vger.kernel.org
Fixes: c1a3c36017 ("proc: bootconfig: Add /proc/bootconfig to show boot config list")
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lv Ruyi 2022-03-29 10:40:04 +00:00 committed by Greg Kroah-Hartman
parent 90ec1b1538
commit 12e380bb6f
1 changed files with 2 additions and 0 deletions
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fs/proc/bootconfig.c
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@ -32,6 +32,8 @@ static int __init copy_xbc_key_value_list(char *dst, size_t size)
int ret = 0;
key = kzalloc(XBC_KEYLEN_MAX, GFP_KERNEL);
if (!key)
return -ENOMEM;
xbc_for_each_key_value(leaf, val) {
ret = xbc_node_compose_key(leaf, key, XBC_KEYLEN_MAX);