ITS#3922 don't leak ber buffer on decode/parse errors

diff --git a/servers/slapd/overlays/syncprov.c b/servers/slapd/overlays/syncprov.c
index 8dcd598278ad39c0f75ccb5bf03ce1b07e91cef6..bc8d940615cfcb35733da02a916231e028962615 100644 (file)
--- a/servers/slapd/overlays/syncprov.c
+++ b/servers/slapd/overlays/syncprov.c
@@ -2286,7 +2286,8 @@ static int syncprov_parseCtrl (
        LDAPControl *ctrl )
 {
        ber_tag_t tag;
-       BerElement *ber;
+       BerElementBuffer berbuf;
+       BerElement *ber = (BerElement *)&berbuf;
        ber_int_t mode;
        ber_len_t len;
        struct berval cookie = BER_BVNULL;
@@ -2320,11 +2321,7 @@ static int syncprov_parseCtrl (
         *      }
         */
 
-       ber = ber_init( &ctrl->ldctl_value );
-       if( ber == NULL ) {
-               rs->sr_text = "internal error";
-               return LDAP_OTHER;
-       }
+       ber_init2( ber, &ctrl->ldctl_value, 0 );
 
        if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
                rs->sr_text = "Sync control : mode decoding error";
@@ -2364,14 +2361,16 @@ static int syncprov_parseCtrl (
        sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
        sr->sr_rhint = rhint;
        if (!BER_BVISNULL(&cookie)) {
-               ber_dupbv( &sr->sr_state.octet_str, &cookie );
+               ber_dupbv_x( &sr->sr_state.octet_str, &cookie, op->o_tmpmemctx );
                slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx );
+               if ( sr->sr_state.rid == -1 ) {
+                       rs->sr_text = "Sync control : cookie parsing error";
+                       return LDAP_PROTOCOL_ERROR;
+               }
        }
 
        op->o_controls[slap_cids.sc_LDAPsync] = sr;
 
-       (void) ber_free( ber, 1 );
-
        op->o_sync = ctrl->ldctl_iscritical
                ? SLAP_CONTROL_CRITICAL
                : SLAP_CONTROL_NONCRITICAL;