From 01f16ab0a581838d44ad79e82c0c3e1691d8506e Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Mon, 30 May 2011 01:55:40 -0400 Subject: Prevent loader from loading itself --- elf/rtld.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'elf') diff --git a/elf/rtld.c b/elf/rtld.c index 174954bf3b..9eb9289ead 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -1076,6 +1076,14 @@ of this helper program; chances are you did not intend to run this program.\n\ /* Now the map for the main executable is available. */ main_map = GL(dl_ns)[LM_ID_BASE]._ns_loaded; + if (GL(dl_rtld_map).l_info[DT_SONAME] != NULL + && main_map->l_info[DT_SONAME] != NULL + && strcmp ((const char *) D_PTR (&GL(dl_rtld_map), l_info[DT_STRTAB]) + + GL(dl_rtld_map).l_info[DT_SONAME]->d_un.d_val, + (const char *) D_PTR (main_map, l_info[DT_STRTAB]) + + main_map->l_info[DT_SONAME]->d_un.d_val) == 0) + _dl_fatal_printf ("loader cannot load itself\n"); + phdr = main_map->l_phdr; phnum = main_map->l_phnum; /* We overwrite here a pointer to a malloc()ed string. But since -- cgit v1.2.3