PACKET_MAX_LEN is usually involved in calculations on size_t values - the
type of the iov_len field in struct iovec. However, being defined bare as
UINT16_MAX, the compiled is likely to assign it a shorter type. This can
lead to unexpected promotions (or lack thereof). Add a cast to force the
type to be what we expect.
Fixes: c43972ad6 ("packet: Give explicit name to maximum packet size")
Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au>
---
packet.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/packet.h b/packet.h
index dd18461b..9061dad7 100644
--- a/packet.h
+++ b/packet.h
@@ -9,7 +9,7 @@
#include <stdbool.h>
/* Maximum size of a single packet stored in pool, including headers */
-#define PACKET_MAX_LEN UINT16_MAX
+#define PACKET_MAX_LEN ((size_t)UINT16_MAX)
/**
* struct pool - Generic pool of packets stored in a buffer
--
2.48.1