From: Tobias Schramm <toblemi...@gmail.com>
Before there might have been as little as one single byte left which
would result in 3 bytes of blob_attr->id_len being out of bounds.
Acked-by: Yousong Zhou <yszhou4t...@gmail.com>
Signed-off-by: Tobias Schramm <toblemi...@gmail.com>
[line wrapped < 72 chars]
Signed-off-by: Petr Štetiar <yn...@true.cz>
---
blob.h | 4 ++--
blobmsg.h | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/blob.h b/blob.h
index af033607e309..6d618767b91a 100644
--- a/blob.h
+++ b/blob.h
@@ -243,7 +243,7 @@ blob_put_u64(struct blob_buf *buf, int id, uint64_t val)
#define __blob_for_each_attr(pos, attr, rem) \
for (pos = (struct blob_attr *) attr; \
- rem > 0 && (blob_pad_len(pos) <= rem) && \
+ rem >= sizeof(struct blob_attr) && (blob_pad_len(pos) <= rem) && \
(blob_pad_len(pos) >= sizeof(struct blob_attr)); \
rem -= blob_pad_len(pos), pos = blob_next(pos))
@@ -251,7 +251,7 @@ blob_put_u64(struct blob_buf *buf, int id, uint64_t val)
#define blob_for_each_attr(pos, attr, rem) \
for (rem = attr ? blob_len(attr) : 0, \
pos = (struct blob_attr *) (attr ? blob_data(attr) : NULL); \
- rem > 0 && (blob_pad_len(pos) <= rem) && \
+ rem >= sizeof(struct blob_attr) && (blob_pad_len(pos) <= rem) && \
(blob_pad_len(pos) >= sizeof(struct blob_attr)); \
rem -= blob_pad_len(pos), pos = blob_next(pos))
diff --git a/blobmsg.h b/blobmsg.h
index 0af087890000..00e0fdc1d5c6 100644
--- a/blobmsg.h
+++ b/blobmsg.h
@@ -266,7 +266,7 @@ int blobmsg_printf(struct blob_buf *buf, const char *name,
const char *format, .
#define blobmsg_for_each_attr(pos, attr, rem) \
for (rem = attr ? blobmsg_data_len(attr) : 0, \
pos = (struct blob_attr *) (attr ? blobmsg_data(attr) : NULL); \
- rem > 0 && (blob_pad_len(pos) <= rem) && \
+ rem >= sizeof(struct blob_attr) && (blob_pad_len(pos) <= rem) && \
(blob_pad_len(pos) >= sizeof(struct blob_attr)); \
rem -= blob_pad_len(pos), pos = blob_next(pos))
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