blob/blobmsg: use 32 bit load/store for 64 bit access, unaligned attributes cause data corruption on ARM

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

1 files changed, 4 insertions, 2 deletions

diff --git a/blob.h b/blob.h
index a8ddce9..557899d 100644
--- a/blob.h
+++ b/blob.h
@@ -191,8 +191,10 @@ blob_get_u32(const struct blob_attr *attr)
 static inline uint64_t
 blob_get_u64(const struct blob_attr *attr)
 {
-	uint64_t *tmp = (uint64_t*)attr->data;
-	return be64_to_cpu(*tmp);
+	uint32_t *ptr = blob_data(attr);
+	uint64_t tmp = ((uint64_t) be32_to_cpu(ptr[0])) << 32;
+	tmp |= be32_to_cpu(ptr[1]);
+	return tmp;
 }
 
 static inline int8_t