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Fix concurrency problem between dl_open and dl_iterate_phdr

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This commit is contained in:
Andreas Krebbel
2010-10-26 00:23:14 -04:00
committed by Ulrich Drepper
parent dbf3a06904
commit f09677388a
6 changed files with 70 additions and 48 deletions
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9
elf/rtld.c
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@@ -1113,6 +1113,10 @@ of this helper program; chances are you did not intend to run this program.\n\
main_map->l_phnum = phnum;
main_map->l_entry = *user_entry;
/* Even though the link map is not yet fully initialized we can add
it to the map list since there are no possible users running yet. */
_dl_add_to_namespace_list (main_map, LM_ID_BASE);
/* At this point we are in a bit of trouble. We would have to
fill in the values for l_dev and l_ino. But in general we
do not know where the file is. We also do not handle AT_EXECFD
@@ -1255,7 +1259,7 @@ of this helper program; chances are you did not intend to run this program.\n\
/* We were invoked directly, so the program might not have a
PT_INTERP. */
_dl_rtld_libname.name = GL(dl_rtld_map).l_name;
/* _dl_rtld_libname.next = NULL; Already zero. */
/* _dl_rtld_libname.next = NULL; Already zero. */
GL(dl_rtld_map).l_libname = &_dl_rtld_libname;
}
else
@@ -1380,6 +1384,9 @@ of this helper program; chances are you did not intend to run this program.\n\
l->l_libname->name = memcpy (copy, dsoname, len);
}
/* Add the vDSO to the object list. */
_dl_add_to_namespace_list (l, LM_ID_BASE);
/* Rearrange the list so this DSO appears after rtld_map. */
assert (l->l_next == NULL);
assert (l->l_prev == main_map);