proc: bootconfig: Add null pointer check

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/[email protected] Cc: [email protected] Fixes: c1a3c36 ("proc: bootconfig: Add /proc/bootconfig to show boot config list") Acked-by: Masami Hiramatsu <[email protected]> Reported-by: Zeal Robot <[email protected]> Signed-off-by: Lv Ruyi <[email protected]> Signed-off-by: Steven Rostedt (Google) <[email protected]>
niw · Apr 2, 2022 · bed5b60 · bed5b60
1 parent 8405541
commit bed5b60
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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);