generic-library/openssl
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Fix bug where freed OIDs could be accessed in EVP_cleanup() by

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defering freeing in OBJ_cleanup().
This commit is contained in:
Dr. Stephen Henson
2006-03-28 17:23:48 +00:00
parent f7a3296d8c
commit 246e09319c
6 changed files with 37 additions and 7 deletions
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18
crypto/objects/obj_dat.c
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@@ -208,8 +208,26 @@ static IMPLEMENT_LHASH_DOALL_FN(cleanup1, ADDED_OBJ *)
static IMPLEMENT_LHASH_DOALL_FN(cleanup2, ADDED_OBJ *)
static IMPLEMENT_LHASH_DOALL_FN(cleanup3, ADDED_OBJ *)
/* The purpose of obj_cleanup_defer is to avoid EVP_cleanup() attempting
* to use freed up OIDs. If neccessary the actual freeing up of OIDs is
* delayed.
*/
int obj_cleanup_defer = 0;
void check_defer(int nid)
{
if (obj_cleanup_defer && nid >= NUM_NID)
obj_cleanup_defer = 1;
}
void OBJ_cleanup(void)
{
if (obj_cleanup_defer)
{
obj_cleanup_defer = 2;
return ;
}
if (added == NULL) return;
added->down_load=0;
lh_doall(added,LHASH_DOALL_FN(cleanup1)); /* zero counters */