X-Git-Url: http://git.archive.openwrt.org/?p=project%2Flibubox.git;a=blobdiff_plain;f=blob.h;h=7f4a46ab405b9d7aaddfac6f8401d056d56888b4;hp=10adde87c0784dff18c3732e2223d41e57a691d2;hb=591a1e349f94a4a69dea0c0bb04919a41367c009;hpb=8cada85b610b40a8c25477985ff5c1d26ef452d0

diff --git a/blob.h b/blob.h
index 10adde8..7f4a46a 100644
--- a/blob.h
+++ b/blob.h
@@ -258,14 +258,14 @@ blob_put_int64(struct blob_buf *buf, int id, uint64_t val)
 
 #define __blob_for_each_attr(pos, attr, rem) \
 	for (pos = (void *) attr; \
-		 (blob_pad_len(pos) <= rem) && \
+		 rem > 0 && (blob_pad_len(pos) <= rem) && \
 		 (blob_pad_len(pos) >= sizeof(struct blob_attr)); \
 		 rem -= blob_pad_len(pos), pos = blob_next(pos))
 
 
 #define blob_for_each_attr(pos, attr, rem) \
 	for (rem = blob_len(attr), pos = blob_data(attr); \
-		 (blob_pad_len(pos) <= rem) && \
+		 rem > 0 && (blob_pad_len(pos) <= rem) && \
 		 (blob_pad_len(pos) >= sizeof(struct blob_attr)); \
 		 rem -= blob_pad_len(pos), pos = blob_next(pos))