fix potential buffer overflow?

nim-lang · Nov 23, 2021 · 97b0e48 · 97b0e48
1 parent 33a66a9
commit 97b0e48
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/lib/pure/net.nim b/lib/pure/net.nim
@@ -1622,6 +1622,7 @@ proc recvFrom*(socket: Socket, data: var string, length: int,
   ##   function will make no effort to return it.
   template adaptRecvFromToDomain(domain: Domain) =
     var addrLen = sizeof(sockAddress).SockLen
+    data.setLen(length)
     result = recvfrom(socket.fd, cstring(data), length.cint, flags.cint,
                       cast[ptr SockAddr](addr(sockAddress)), addr(addrLen))