From: Lv Ruyi lv.ruyi@zte.com.cn

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 --- fs/proc/bootconfig.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/fs/proc/bootconfig.c b/fs/proc/bootconfig.c index 6d8d4bf20837..2e244ada1f97 100644 --- a/fs/proc/bootconfig.c +++ b/fs/proc/bootconfig.c @@ -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);