ITS#8043 don't leave dangling syncops

diff --git a/servers/slapd/overlays/syncprov.c b/servers/slapd/overlays/syncprov.c
index 04aba3bf9927b881efb8476094b75bf054ee99b9..853da538c2d2d150a78a9bf5019f34959f7a15d8 100644 (file)
--- a/servers/slapd/overlays/syncprov.c
+++ b/servers/slapd/overlays/syncprov.c
@@ -69,6 +69,7 @@ typedef struct syncres {
 /* Record of a persistent search */
 typedef struct syncops {
        struct syncops *s_next;
+       struct syncprov_info_t *s_si;
        struct berval   s_base;         /* ndn of search base */
        ID              s_eid;          /* entryID of search base */
        Operation       *s_op;          /* search op */
@@ -789,7 +790,7 @@ static void free_resinfo( syncres *sr )
 }
 
 static int
-syncprov_free_syncop( syncops *so )
+syncprov_free_syncop( syncops *so, int unlink )
 {
        syncres *sr, *srnext;
        GroupAssertion *ga, *gnext;
@@ -801,6 +802,17 @@ syncprov_free_syncop( syncops *so )
                return 0;
        }
        ldap_pvt_thread_mutex_unlock( &so->s_mutex );
+       if ( unlink ) {
+               syncops **sop;
+               ldap_pvt_thread_mutex_lock( &so->s_si->si_ops_mutex );
+               for ( sop = &so->s_si->si_ops; *sop; sop = &(*sop)->s_next ) {
+                       if ( *sop == so ) {
+                               *sop = so->s_next;
+                               break;
+                       }
+               }
+               ldap_pvt_thread_mutex_unlock( &so->s_si->si_ops_mutex );
+       }
        if ( so->s_flags & PS_IS_DETACHED ) {
                filter_free( so->s_op->ors_filter );
                for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
@@ -987,7 +999,7 @@ syncprov_qtask( void *ctx, void *arg )
        rc = syncprov_qplay( op, so );
 
        /* decrement use count... */
-       syncprov_free_syncop( so );
+       syncprov_free_syncop( so, 1 );
 
        return NULL;
 }
@@ -1114,7 +1126,7 @@ syncprov_drop_psearch( syncops *so, int lock )
                if ( lock )
                        ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
        }
-       return syncprov_free_syncop( so );
+       return syncprov_free_syncop( so, 0 );
 }
 
 static int
@@ -1132,15 +1144,15 @@ syncprov_op_abandon( Operation *op, SlapReply *rs )
 {
        slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
        syncprov_info_t         *si = on->on_bi.bi_private;
-       syncops *so, *soprev;
+       syncops *so = NULL, **sop;
 
        ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
-       for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
-               soprev=so, so=so->s_next ) {
+       for ( sop=&si->si_ops; *sop; sop = &(*sop)->s_next ) {
+               so = *sop;
                if ( so->s_op->o_connid == op->o_connid &&
                        so->s_op->o_msgid == op->orn_msgid ) {
                                so->s_op->o_abandon = 1;
-                               soprev->s_next = so->s_next;
+                               *sop = so->s_next;
                                break;
                }
        }
@@ -1348,7 +1360,7 @@ syncprov_matchops( Operation *op, opcookie *opc, int saveit )
                         * with saveit == TRUE
                         */
                        snext = ss->s_next;
-                       if ( syncprov_free_syncop( ss ) ) {
+                       if ( syncprov_free_syncop( ss, 0 ) ) {
                                *pss = snext;
                                gonext = 0;
                        }
@@ -1393,7 +1405,7 @@ syncprov_op_cleanup( Operation *op, SlapReply *rs )
 
        for (sm = opc->smatches; sm; sm=snext) {
                snext = sm->sm_next;
-               syncprov_free_syncop( sm->sm_op );
+               syncprov_free_syncop( sm->sm_op, 1 );
                op->o_tmpfree( sm, op->o_tmpmemctx );
        }
 
@@ -2500,6 +2512,7 @@ syncprov_op_search( Operation *op, SlapReply *rs )
                        ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
                }
                sop->s_next = si->si_ops;
+               sop->s_si = si;
                si->si_ops = sop;
                ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
        }