--- /dev/null
+From bed5b60bf67ccd8957b8c0558fead30c4a3f5d3f Mon Sep 17 00:00:00 2001
+From: Lv Ruyi <lv.ruyi@zte.com.cn>
+Date: Tue, 29 Mar 2022 10:40:04 +0000
+Subject: proc: bootconfig: Add null pointer check
+
+From: Lv Ruyi <lv.ruyi@zte.com.cn>
+
+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: c1a3c36017d4 ("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>
+---
+ fs/proc/bootconfig.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/fs/proc/bootconfig.c
++++ b/fs/proc/bootconfig.c
+@@ -32,6 +32,8 @@ static int __init copy_xbc_key_value_lis
+ 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);