blobmsg: accept NULL attr in blobmsg_get_string()

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/blobmsg.h b/blobmsg.h
index 7041aca..e58f95d 100644
--- a/blobmsg.h
+++ b/blobmsg.h
@@ -214,6 +214,9 @@ static inline uint64_t blobmsg_get_u64(struct blob_attr *attr)
 
 static inline char *blobmsg_get_string(struct blob_attr *attr)
 {
+	if (!attr)
+		return NULL;
+
 	return (char *) blobmsg_data(attr);
 }