From 2abfa1907218c5ec9d52bb81bee3f1af652f67c7 Mon Sep 17 00:00:00 2001
From: Florian Weimer <[email protected]>
Date: Tue, 24 Sep 2024 13:23:10 +0200
Subject: [PATCH] elf: Move __rtld_malloc_init_stubs call into _dl_start_final

Calling an extern function in a different translation unit before
self-relocation is brittle.  The compiler may load the address
at an earlier point in _dl_start, before self-relocation.  In
_dl_start_final, the call is behind a compiler barrier, so this
cannot happen.
---
 elf/rtld.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/elf/rtld.c b/elf/rtld.c
index 9355b30214..cb6b61d570 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -452,6 +452,8 @@ _dl_start_final (void *arg, struct dl_start_final_info *info)
 {
   ElfW(Addr) start_addr;
 
+  __rtld_malloc_init_stubs ();
+
   /* Do not use an initializer for these members because it would
      interfere with __rtld_static_init.  */
   GLRO (dl_find_object) = &_dl_find_object;
@@ -574,8 +576,6 @@ _dl_start (void *arg)
      function, that way the compiler cannot put accesses to the GOT
      before ELF_DYNAMIC_RELOCATE.  */
 
-  __rtld_malloc_init_stubs ();
-
 #ifdef DONT_USE_BOOTSTRAP_MAP
   return _dl_start_final (arg);
 #else
-- 
2.27.0