From 99e22a4366469c2675f65acf28a0d8f8fbd38f14 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Sun, 23 Jun 2013 19:13:52 -0700
Subject: [PATCH] ITS#7628 fix back-mdb txn refcount

If multiple ops used the same opinfo the refcount wasn't being decremented
---
 servers/slapd/back-mdb/add.c         | 2 ++
 servers/slapd/back-mdb/bind.c        | 2 ++
 servers/slapd/back-mdb/compare.c     | 2 ++
 servers/slapd/back-mdb/delete.c      | 2 ++
 servers/slapd/back-mdb/id2entry.c    | 3 ++-
 servers/slapd/back-mdb/modify.c      | 2 ++
 servers/slapd/back-mdb/modrdn.c      | 2 ++
 servers/slapd/back-mdb/operational.c | 2 ++
 servers/slapd/back-mdb/referral.c    | 2 ++
 servers/slapd/back-mdb/search.c      | 2 ++
 10 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/servers/slapd/back-mdb/add.c b/servers/slapd/back-mdb/add.c
index 289eb321a2..1b70597149 100644
--- a/servers/slapd/back-mdb/add.c
+++ b/servers/slapd/back-mdb/add.c
@@ -438,6 +438,8 @@ return_results:
 		if ( opinfo.moi_oe.oe_key ) {
 			LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
 		}
+	} else {
+		moi->moi_ref--;
 	}
 
 	if( success == LDAP_SUCCESS ) {
diff --git a/servers/slapd/back-mdb/bind.c b/servers/slapd/back-mdb/bind.c
index 0cd716e71f..1563723294 100644
--- a/servers/slapd/back-mdb/bind.c
+++ b/servers/slapd/back-mdb/bind.c
@@ -138,6 +138,8 @@ done:
 	if ( moi == &opinfo ) {
 		mdb_txn_reset( moi->moi_txn );
 		LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
+	} else {
+		moi->moi_ref--;
 	}
 	/* free entry and reader lock */
 	if( e != NULL ) {
diff --git a/servers/slapd/back-mdb/compare.c b/servers/slapd/back-mdb/compare.c
index 3ea188fef2..81f583cf7e 100644
--- a/servers/slapd/back-mdb/compare.c
+++ b/servers/slapd/back-mdb/compare.c
@@ -130,6 +130,8 @@ done:
 	if ( moi == &opinfo ) {
 		mdb_txn_reset( moi->moi_txn );
 		LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
+	} else {
+		moi->moi_ref--;
 	}
 	/* free entry */
 	if ( e != NULL ) {
diff --git a/servers/slapd/back-mdb/delete.c b/servers/slapd/back-mdb/delete.c
index 1735fee799..ac857395b2 100644
--- a/servers/slapd/back-mdb/delete.c
+++ b/servers/slapd/back-mdb/delete.c
@@ -457,6 +457,8 @@ return_results:
 		if ( opinfo.moi_oe.oe_key ) {
 			LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
 		}
+	} else {
+		moi->moi_ref--;
 	}
 
 	send_ldap_result( op, rs );
diff --git a/servers/slapd/back-mdb/id2entry.c b/servers/slapd/back-mdb/id2entry.c
index 84de09d125..a86a25ce7e 100644
--- a/servers/slapd/back-mdb/id2entry.c
+++ b/servers/slapd/back-mdb/id2entry.c
@@ -505,7 +505,8 @@ mdb_opinfo_get( Operation *op, struct mdb_info *mdb, int rdonly, mdb_op_info **m
 		moi->moi_ref = 0;
 	}
 	if ( renew ) {
-		mdb_txn_renew( moi->moi_txn );
+		rc = mdb_txn_renew( moi->moi_txn );
+		assert(!rc);
 	}
 	moi->moi_ref++;
 	if ( *moip != moi )
diff --git a/servers/slapd/back-mdb/modify.c b/servers/slapd/back-mdb/modify.c
index 1ea664f4fe..1a81e820a0 100644
--- a/servers/slapd/back-mdb/modify.c
+++ b/servers/slapd/back-mdb/modify.c
@@ -671,6 +671,8 @@ done:
 		if ( opinfo.moi_oe.oe_key ) {
 			LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
 		}
+	} else {
+		moi->moi_ref--;
 	}
 
 	if( e != NULL ) {
diff --git a/servers/slapd/back-mdb/modrdn.c b/servers/slapd/back-mdb/modrdn.c
index f70457bdaf..2aa545d242 100644
--- a/servers/slapd/back-mdb/modrdn.c
+++ b/servers/slapd/back-mdb/modrdn.c
@@ -656,6 +656,8 @@ done:
 		if ( opinfo.moi_oe.oe_key ) {
 			LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
 		}
+	} else {
+		moi->moi_ref--;
 	}
 
 	if( preread_ctrl != NULL && (*preread_ctrl) != NULL ) {
diff --git a/servers/slapd/back-mdb/operational.c b/servers/slapd/back-mdb/operational.c
index 4937984b7f..398df1271d 100644
--- a/servers/slapd/back-mdb/operational.c
+++ b/servers/slapd/back-mdb/operational.c
@@ -76,6 +76,8 @@ done:;
 	if ( moi == &opinfo ) {
 		mdb_txn_reset( moi->moi_txn );
 		LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
+	} else {
+		moi->moi_ref--;
 	}
 	return rc;
 }
diff --git a/servers/slapd/back-mdb/referral.c b/servers/slapd/back-mdb/referral.c
index c253f2ee0c..1325c442e7 100644
--- a/servers/slapd/back-mdb/referral.c
+++ b/servers/slapd/back-mdb/referral.c
@@ -142,6 +142,8 @@ done:
 	if ( moi == &opinfo ) {
 		mdb_txn_reset( moi->moi_txn );
 		LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
+	} else {
+		moi->moi_ref--;
 	}
 	if ( e )
 		mdb_entry_return( op, e );
diff --git a/servers/slapd/back-mdb/search.c b/servers/slapd/back-mdb/search.c
index 286d5e734e..5cc0d28c00 100644
--- a/servers/slapd/back-mdb/search.c
+++ b/servers/slapd/back-mdb/search.c
@@ -1058,6 +1058,8 @@ done:
 	if ( moi == &opinfo ) {
 		mdb_txn_reset( moi->moi_txn );
 		LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
+	} else {
+		moi->moi_ref--;
 	}
 	if( rs->sr_v2ref ) {
 		ber_bvarray_free( rs->sr_v2ref );