Fix issue with strncpy truncating null character from source string

FreeRTOS · Nov 27, 2023 · c80540c · c80540c
1 parent c263e33
commit c80540c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/source/FreeRTOS_DNS.c b/source/FreeRTOS_DNS.c
@@ -282,7 +282,8 @@
 
  ( void ) memset( pxAddrInfo, 0, sizeof( *pxAddrInfo ) );
  pxAddrInfo->ai_canonname = pxAddrInfo->xPrivateStorage.ucName;
- ( void ) strncpy( pxAddrInfo->xPrivateStorage.ucName, pcName, sizeof( pxAddrInfo->xPrivateStorage.ucName ) );
+ ( void ) strncpy( pxAddrInfo->xPrivateStorage.ucName, pcName, sizeof( pxAddrInfo->xPrivateStorage.ucName ) - 1 );
+ pxAddrInfo->xPrivateStorage.ucName[ sizeof( pxAddrInfo->xPrivateStorage.ucName ) - 1 ] = '\0';
 
  pxAddrInfo->ai_addr = ( ( struct freertos_sockaddr * ) &( pxAddrInfo->xPrivateStorage.sockaddr ) );