From: Felix Fietkau <nbd@nbd.name>
Date: Mon, 27 Nov 2023 13:40:02 +0000 (+0100)
Subject: lib: fix avl tree lookup
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a92101631c0dd2c466dfe22ffd752b36929b2f69;p=project%2Fudebug.git

lib: fix avl tree lookup

The delta between IDs can be bigger than INT_MAX, causing order mismatch
in the tree and lookup failures

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/lib.c b/lib.c
index ec8c23d..caba7d9 100644
--- a/lib.c
+++ b/lib.c
@@ -37,7 +37,11 @@ static void __randname(char *template)
 int udebug_id_cmp(const void *k1, const void *k2, void *ptr)
 {
 	uint32_t id1 = (uint32_t)(uintptr_t)k1, id2 = (uint32_t)(uintptr_t)k2;
-	return id1 - id2;
+	if (id1 < id2)
+		return -1;
+	else if (id1 > id2)
+		return 1;
+	return 0;
 }
 
 static inline int