From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 10 Aug 2025 21:43:37 +0000 (+0200)
Subject: malloc: Fix checking for small negative values of tcache_key
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8543577b04ded6d979ffcc5a818930e4d74d0645;p=thirdparty%2Fglibc.git

malloc: Fix checking for small negative values of tcache_key

tcache_key is unsigned so we should turn it explicitly to signed before
taking its absolute value.
---

diff --git a/malloc/malloc.c b/malloc/malloc.c
index c135916d32..e08873cad5 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -3108,7 +3108,7 @@ tcache_key_initialize (void)
   int minimum_bits = __WORDSIZE / 4;
   int maximum_bits = __WORDSIZE - minimum_bits;
 
-  while (labs (tcache_key) <= 0x1000000
+  while (labs ((intptr_t) tcache_key) <= 0x1000000
       || stdc_count_ones (tcache_key) < minimum_bits
       || stdc_count_ones (tcache_key) > maximum_bits)
     {