[glibc/release/2.36/master] elf: Do not run constructors for proxy objects

[glibc/release/2.36/master] elf: Do not run constructors for proxy objects

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f33ffef08983621c6a89a12771486c3beaf50d11

commit f33ffef08983621c6a89a12771486c3beaf50d11
Author: Florian Weimer <fweimer@redhat.com>
Date:   Tue Aug 22 13:56:25 2023 +0200

    elf: Do not run constructors for proxy objects
    
    Otherwise, the ld.so constructor runs for each audit namespace
    and each dlmopen namespace.
    
    (cherry picked from commit f6c8204fd7fabf0cf4162eaf10ccf23258e4d10e)

Diff:
---
 elf/dl-init.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/elf/dl-init.c b/elf/dl-init.c
index deefeb099a..fca8e3a05e 100644
--- a/elf/dl-init.c
+++ b/elf/dl-init.c
@@ -25,10 +25,14 @@
 static void
 call_init (struct link_map *l, int argc, char **argv, char **env)
 {
+  /* Do not run constructors for proxy objects.  */
+  if (l != l->l_real)
+    return;
+
   /* If the object has not been relocated, this is a bug.  The
      function pointers are invalid in this case.  (Executables do not
-     need relocation, and neither do proxy objects.)  */
-  assert (l->l_real->l_relocated || l->l_real->l_type == lt_executable);
+     need relocation.)  */
+  assert (l->l_relocated || l->l_type == lt_executable);
 
   if (l->l_init_called)
     /* This object is all done.  */