From: Lv Ruyi <lv.ruyi@xxxxxxxxxx> 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@xxxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx Fixes: c1a3c36017d4 ("proc: bootconfig: Add /proc/bootconfig to show boot config list") Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Reported-by: Zeal Robot <zealci@xxxxxxxxxx> Signed-off-by: Lv Ruyi <lv.ruyi@xxxxxxxxxx> Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> --- 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); -- 2.35.1
