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From: "pfrankli at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/27607] New: Memory leak in support/support_test_main.c
Date: Thu, 18 Mar 2021 18:31:57 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27607

            Bug ID: 27607
           Summary: Memory leak in support/support_test_main.c
           Product: glibc
           Version: 2.33
            Status: NEW
          Severity: minor
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: pfrankli at redhat dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

if (wait_for_debugger)
    {
      pid_t mypid;
      FILE *gdb_script;
      char *gdb_script_name;
      int inside_container =3D 0;

      mypid =3D getpid();
      if (mypid < 3)
        {
          const char *outside_pid =3D getenv("PID_OUTSIDE_CONTAINER");
          if (outside_pid)
            {
              mypid =3D atoi (outside_pid);
              inside_container =3D 1;
            }
        }

      gdb_script_name =3D (char *) xmalloc (strlen (argv[0]) + strlen (".gd=
b") +
1);


We allocate gdb_script_name.

      sprintf (gdb_script_name, "%s.gdb", argv[0]);
      gdb_script =3D xfopen (gdb_script_name, "w");

      fprintf (stderr, "Waiting for debugger, test process is pid %d\n",
mypid);
      fprintf (stderr, "gdb -x %s\n", gdb_script_name);
      if (inside_container)
        fprintf (gdb_script, "set sysroot %s/testroot.root\n",
support_objdir_root);
      fprintf (gdb_script, "file\n");
      fprintf (gdb_script, "file %s\n", argv[0]);
      fprintf (gdb_script, "symbol-file %s\n", argv[0]);
      fprintf (gdb_script, "exec-file %s\n", argv[0]);
      fprintf (gdb_script, "attach %ld\n", (long int) mypid);
      fprintf (gdb_script, "set wait_for_debugger =3D 0\n");
      fclose (gdb_script);
    }

Then we go out of scope without freeing gdb_script_name.

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