FreeRTOS_FillEndPoint: save pxNext before clearing entire endpoint st…

…ruct
FreeRTOS · Sep 13, 2023 · 085741c · 085741c
1 parent 855d6d5
commit 085741c
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/source/FreeRTOS_Routing.c b/source/FreeRTOS_Routing.c
@@ -109,7 +109,12 @@ struct xIPv6_Couple
  /* Fill in and add an end-point to a network interface.
  * The user must make sure that the object pointed to by 'pxEndPoint'
  * will remain to exist. */
+
+ /* As the endpoint might be part of a linked list,
+ protect the field pxNext from being overwritten. */
+ NetworkEndPoint_t * pxNext = pxEndPoint->pxNext;
  ( void ) memset( pxEndPoint, 0, sizeof( *pxEndPoint ) );
+ pxEndPoint->pxNext = pxNext;
 
  ulIPAddress = FreeRTOS_inet_addr_quick( ucIPAddress[ 0 ], ucIPAddress[ 1 ], ucIPAddress[ 2 ], ucIPAddress[ 3 ] );
  pxEndPoint->ipv4_settings.ulNetMask = FreeRTOS_inet_addr_quick( ucNetMask[ 0 ], ucNetMask[ 1 ], ucNetMask[ 2 ], ucNetMask[ 3 ] );