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| author | Ulrich Drepper <drepper@gmail.com> | 2011-05-30 01:55:40 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-05-30 01:55:40 -0400 |
| commit | 01f16ab0a581838d44ad79e82c0c3e1691d8506e (patch) | |
| tree | 3a86fd351888f646ad8ae26313570cddbaf1d52d | |
| parent | 7ae22829afb2b4ca531d1c00437d428f55d59341 (diff) | |
| download | glibc-01f16ab0a581838d44ad79e82c0c3e1691d8506e.tar.gz glibc-01f16ab0a581838d44ad79e82c0c3e1691d8506e.tar.xz glibc-01f16ab0a581838d44ad79e82c0c3e1691d8506e.zip | |
Prevent loader from loading itself
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | elf/rtld.c | 8 |
2 files changed, 12 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 70dbc4026b..bb7f02e06c 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,7 @@ +2011-05-30 Ulrich Drepper <drepper@gmail.com> + + * elf/rtld.c (dl_main): Don't allow the loader to load itself. + 2011-05-29 Ulrich Drepper <drepper@gmail.com> [BZ #12350] 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 |