zapi: Harden dispatch to prevent invalid data

rzr · rzr · commit a3d5f2e04200 · 2025-06-20T18:18:07.000+02:00
Origin: SiliconLabsSoftware#124 Bug-SiliconLabs: UIC-3668 Relate-to: SLVDBBP-3169975 Relate-to: SiliconLabsSoftware/z-wave-engine-application-layer#42 Signed-off-by: Philippe Coval <philippe.coval@silabs.com>
diff --git a/applications/zpc/components/zwave_api/src/zwapi_init.c b/applications/zpc/components/zwave_api/src/zwapi_init.c
@@ -136,7 +136,7 @@ bool zwapi_poll()
   zwapi_session_enqueue_rx_frames();
   bool more_frames = zwapi_session_dequeue_frame(&frame, &len);
 
-  if (frame) {
+  if (frame && len >=1) {
     zwave_api_protocol_rx_dispatch(frame, len);
     free(frame);
   }

Original file line number	Diff line number	Diff line change
`@@ -136,7 +136,7 @@ bool zwapi_poll()`
`136`	`136`	`zwapi_session_enqueue_rx_frames();`
`137`	`137`	`bool more_frames = zwapi_session_dequeue_frame(&frame, &len);`
`138`	`138`
`139`		`- if (frame) {`
	`139`	`+ if (frame && len >=1) {`
`140`	`140`	`zwave_api_protocol_rx_dispatch(frame, len);`
`141`	`141`	`free(frame);`
`142`	`142`	`}`