From: Alan T. DeKok <aland@freeradius.org>
Date: Thu, 7 Aug 2025 15:24:18 +0000 (-0400)
Subject: catch pop on running trigger, with empty stack
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=07ed4615bbe4e1a733b8cf286d06fac853f301c8;p=thirdparty%2Ffreeradius-server.git

catch pop on running trigger, with empty stack
---

diff --git a/src/lib/unlang/interpret.c b/src/lib/unlang/interpret.c
index ea9d112b7a5..582c49d0080 100644
--- a/src/lib/unlang/interpret.c
+++ b/src/lib/unlang/interpret.c
@@ -999,6 +999,15 @@ CC_HINT(hot) rlm_rcode_t unlang_interpret(request_t *request, bool running)
 			unlang_result_t section_result = frame->section_result; /* record the result of the frame before we pop it*/
 
 			DUMP_STACK;
+
+			/*
+			 *	Triggers can run modules which pop, and then the stack is empty.
+			 */
+			if (unlikely(stack->depth == 0)) {
+				fr_assert(top_frame);
+				break;
+			}
+
 			/*
 			 *	Head on back up the stack
 			 */