fix buffer overrun protection

jvde-github · jvde-github · commit 6e3163031c3e · 2025-11-27T19:32:20.000+01:00
diff --git a/Source/Marine/Message.cpp b/Source/Marine/Message.cpp
@@ -297,7 +297,7 @@ namespace AIS
 
 	bool Message::setUint(int start, int len, unsigned val)
 	{
-		if (length >= MAX_AIS_LENGTH)
+		if (start + len >= MAX_AIS_LENGTH)
 			return false;
 
 		int x = start >> 3, y = start & 7;

Original file line number	Diff line number	Diff line change
`@@ -297,7 +297,7 @@ namespace AIS`
`297`	`297`
`298`	`298`	`bool Message::setUint(int start, int len, unsigned val)`
`299`	`299`	`{`
`300`		`- if (length >= MAX_AIS_LENGTH)`
	`300`	`+ if (start + len >= MAX_AIS_LENGTH)`
`301`	`301`	`return false;`
`302`	`302`
`303`	`303`	`int x = start >> 3, y = start & 7;`