From 0f00932955521c3c2fb8140176ab72f22172c298 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Fri, 26 Feb 2021 14:51:13 +0100
Subject: Started UBSan and stack-smashing check support

---
 libc/stack.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'libc/stack.c')

diff --git a/libc/stack.c b/libc/stack.c
index e86a8c6..0cbb69d 100644
--- a/libc/stack.c
+++ b/libc/stack.c
@@ -102,7 +102,8 @@ void *stack_pop(struct stack *stack)
 
 	struct stack_node *prev = stack->tail;
 
-	stack->tail->prev->next = NULL;
+	if (stack->tail->prev)
+		stack->tail->prev->next = NULL;
 	stack->tail = stack->tail->prev;
 
 	void *data = prev->data;
-- 
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