From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 17 Dec 2022 21:00:19 +0000 (-0500)
Subject: use libc-internal malloc for pthread_atfork
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;ds=sidebyside;h=9532ae1318201d66b235a618df16aac0b3386630;p=musl

use libc-internal malloc for pthread_atfork

while no lock is held here making it a lock-order issue, replacement
malloc is likely to want to use pthread_atfork, possibly making the
call to malloc infinitely recursive.

even if not, there is no reason to prefer an application-provided
malloc here.
---

diff --git a/src/thread/pthread_atfork.c b/src/thread/pthread_atfork.c
index 6d348ac8..26d32543 100644
--- a/src/thread/pthread_atfork.c
+++ b/src/thread/pthread_atfork.c
@@ -3,6 +3,11 @@
 #include "libc.h"
 #include "lock.h"
 
+#define malloc __libc_malloc
+#define calloc undef
+#define realloc undef
+#define free undef
+
 static struct atfork_funcs {
 	void (*prepare)(void);
 	void (*parent)(void);