[Bug dynamic-link/28062] New: Suppress audit calls when a (new) namespace is empty

[Bug dynamic-link/28062] New: Suppress audit calls when a (new) namespace is empty

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28062

            Bug ID: 28062
           Summary: Suppress audit calls when a (new) namespace is empty
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dynamic-link
          Assignee: unassigned at sourceware dot org
          Reporter: adhemerval.zanella at linaro dot org
  Target Milestone: ---

For a new Lmid_t the namespace link_map list are empty, so it requires to check
if before using it. This can happen for when audit module is used along with
dlmopen:

$ cat auditor.c 
#define _GNU_SOURCE
#include <link.h>

unsigned int
la_version (unsigned int version)
{
  return LAV_CURRENT;
}

char *
la_objsearch (const char *name, uintptr_t *cookie, unsigned int flag)
{
  return (char *) name;
}

void
la_activity (uintptr_t *cookie, unsigned int flag)
{
}
$ cat foo.c 
int foo (void)
{
  return 1;
}
$ cat main.c 
#define _GNU_SOURCE
#include <assert.h>
#include <dlfcn.h>
#include <stddef.h>

int main (int argc, char *argv[])
{
  void *h = dlmopen (LM_ID_NEWLM, "libfoo.so", RTLD_NOW);
  assert (h != NULL);
  return 0;
}
$ gcc main.c -o main -ldl
$ gcc -fpic -shared foo.c -o libfoo.so
$ gcc -fpic -shared auditor.c -o auditor.so
$ LD_AUDIT=./auditor.so LD_LIBRARY_PATH=. ./main 
Segmentation fault (core dumped)

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[Bug dynamic-link/28062] Suppress audit calls when a (new) namespace is empty

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28062

Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at sourceware dot org   |adhemerval.zanella at linaro dot o
                   |                            |rg

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[Bug dynamic-link/28062] Suppress audit calls when a (new) namespace is empty

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28062

Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
   Target Milestone|---                         |2.35
             Status|NEW                         |RESOLVED

--- Comment #1 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Fixed on 2.35.

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