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From 577fa6ada5d860e5ed7291aff2e41938ca92793b Mon Sep 17 00:00:00 2001
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From: Noriko Hosoi <nhosoi@redhat.com>
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Date: Sun, 26 Apr 2015 14:46:44 -0700
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Subject: [PATCH 64/72] Ticket #48146 - async simple paged results issue
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Description: When the last page of the single paged results is returned,
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the search results structure is freed in the simple paged results code
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(in op_shared_search). The search results structure is stashed in the
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simple paged results object across the pages. The free and the clean up
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of the stashed address should have been atomic, but it was not.
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https://fedorahosted.org/389/ticket/48146
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Reviewed by mreynolds@redhat.com (Thank you, Mark!!)
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(cherry picked from commit 947477f2e2367337a8c220d8c9d03a62bf1bbf1c)
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(cherry picked from commit ec8801a69adbe2f502513fabcbb79bc5e38bf197)
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---
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ldap/servers/slapd/opshared.c | 18 +++++++-----------
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ldap/servers/slapd/pagedresults.c | 36 +++++++++++-------------------------
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2 files changed, 18 insertions(+), 36 deletions(-)
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diff --git a/ldap/servers/slapd/opshared.c b/ldap/servers/slapd/opshared.c
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index ebd4fdf..e7cee8a 100644
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--- a/ldap/servers/slapd/opshared.c
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+++ b/ldap/servers/slapd/opshared.c
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@@ -881,7 +881,10 @@ op_shared_search (Slapi_PBlock *pb, int send_result)
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slapi_pblock_get(pb, SLAPI_SEARCH_RESULT_SET, &sr);
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if (PAGEDRESULTS_SEARCH_END == pr_stat) {
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if (sr) { /* in case a left over sr is found, clean it up */
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+ PR_Lock(pb->pb_conn->c_mutex);
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+ pagedresults_set_search_result(pb->pb_conn, operation, NULL, 1, pr_idx);
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be->be_search_results_release(&sr);
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+ PR_Unlock(pb->pb_conn->c_mutex);
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}
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if (NULL == next_be) {
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/* no more entries && no more backends */
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@@ -897,17 +900,10 @@ op_shared_search (Slapi_PBlock *pb, int send_result)
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slapi_pblock_get(pb, SLAPI_SEARCH_RESULT_SET_SIZE_ESTIMATE, &estimate);
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pagedresults_lock(pb->pb_conn, pr_idx);
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if ((pagedresults_set_current_be(pb->pb_conn, be, pr_idx) < 0) ||
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- (pagedresults_set_search_result(pb->pb_conn, operation,
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- sr, 0, pr_idx) < 0) ||
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- (pagedresults_set_search_result_count(pb->pb_conn, operation,
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- curr_search_count,
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- pr_idx) < 0) ||
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- (pagedresults_set_search_result_set_size_estimate(pb->pb_conn,
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- operation,
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- estimate,
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- pr_idx) < 0) ||
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- (pagedresults_set_with_sort(pb->pb_conn, operation,
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- with_sort, pr_idx) < 0)) {
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+ (pagedresults_set_search_result(pb->pb_conn, operation, sr, 0, pr_idx) < 0) ||
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+ (pagedresults_set_search_result_count(pb->pb_conn, operation, curr_search_count, pr_idx) < 0) ||
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+ (pagedresults_set_search_result_set_size_estimate(pb->pb_conn, operation, estimate, pr_idx) < 0) ||
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+ (pagedresults_set_with_sort(pb->pb_conn, operation, with_sort, pr_idx) < 0)) {
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pagedresults_unlock(pb->pb_conn, pr_idx);
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goto free_and_return;
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}
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diff --git a/ldap/servers/slapd/pagedresults.c b/ldap/servers/slapd/pagedresults.c
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index d589708..e61c000 100644
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--- a/ldap/servers/slapd/pagedresults.c
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+++ b/ldap/servers/slapd/pagedresults.c
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@@ -100,26 +100,20 @@ pagedresults_parse_control_value( Slapi_PBlock *pb,
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ber_free(ber, 1);
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if ( cookie.bv_len <= 0 ) {
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int i;
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- int maxlen;
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/* first time? */
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- maxlen = conn->c_pagedresults.prl_maxlen;
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+ int maxlen = conn->c_pagedresults.prl_maxlen;
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if (conn->c_pagedresults.prl_count == maxlen) {
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if (0 == maxlen) { /* first time */
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conn->c_pagedresults.prl_maxlen = 1;
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- conn->c_pagedresults.prl_list =
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- (PagedResults *)slapi_ch_calloc(1,
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- sizeof(PagedResults));
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+ conn->c_pagedresults.prl_list = (PagedResults *)slapi_ch_calloc(1, sizeof(PagedResults));
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} else {
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/* new max length */
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conn->c_pagedresults.prl_maxlen *= 2;
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- conn->c_pagedresults.prl_list =
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- (PagedResults *)slapi_ch_realloc(
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+ conn->c_pagedresults.prl_list = (PagedResults *)slapi_ch_realloc(
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(char *)conn->c_pagedresults.prl_list,
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- sizeof(PagedResults) *
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- conn->c_pagedresults.prl_maxlen);
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+ sizeof(PagedResults) * conn->c_pagedresults.prl_maxlen);
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/* initialze newly allocated area */
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- memset(conn->c_pagedresults.prl_list + maxlen, '\0',
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- sizeof(PagedResults) * maxlen);
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+ memset(conn->c_pagedresults.prl_list + maxlen, '\0', sizeof(PagedResults) * maxlen);
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}
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*index = maxlen; /* the first position in the new area */
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} else {
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@@ -276,8 +270,8 @@ pagedresults_free_one( Connection *conn, Operation *op, int index )
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prp->pr_current_be->be_search_results_release &&
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prp->pr_search_result_set) {
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prp->pr_current_be->be_search_results_release(&(prp->pr_search_result_set));
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- prp->pr_current_be = NULL;
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}
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+ prp->pr_current_be = NULL;
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if (prp->pr_mutex) {
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/* pr_mutex is reused; back it up and reset it. */
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prmutex = prp->pr_mutex;
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@@ -314,8 +308,8 @@ pagedresults_free_one_msgid_nolock( Connection *conn, ber_int_t msgid )
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prp->pr_current_be->be_search_results_release &&
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prp->pr_search_result_set) {
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prp->pr_current_be->be_search_results_release(&(prp->pr_search_result_set));
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- prp->pr_current_be = NULL;
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}
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+ prp->pr_current_be = NULL;
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prp->pr_flags |= CONN_FLAG_PAGEDRESULTS_ABANDONED;
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prp->pr_flags &= ~CONN_FLAG_PAGEDRESULTS_PROCESSING;
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conn->c_pagedresults.prl_count--;
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@@ -404,16 +398,8 @@ pagedresults_set_search_result(Connection *conn, Operation *op, void *sr,
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if (conn && (index > -1)) {
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if (!locked) PR_Lock(conn->c_mutex);
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if (index < conn->c_pagedresults.prl_maxlen) {
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- if (sr) { /* set */
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- if (NULL ==
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- conn->c_pagedresults.prl_list[index].pr_search_result_set) {
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- conn->c_pagedresults.prl_list[index].pr_search_result_set = sr;
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- rc = 0;
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- }
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- } else { /* reset */
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- conn->c_pagedresults.prl_list[index].pr_search_result_set = sr;
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- rc = 0;
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- }
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+ conn->c_pagedresults.prl_list[index].pr_search_result_set = sr;
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+ rc = 0;
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}
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if (!locked) PR_Unlock(conn->c_mutex);
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}
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@@ -732,9 +718,9 @@ pagedresults_cleanup(Connection *conn, int needlock)
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if (prp->pr_current_be && prp->pr_search_result_set &&
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prp->pr_current_be->be_search_results_release) {
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prp->pr_current_be->be_search_results_release(&(prp->pr_search_result_set));
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- prp->pr_current_be = NULL;
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rc = 1;
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}
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+ prp->pr_current_be = NULL;
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if (prp->pr_mutex) {
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PR_DestroyLock(prp->pr_mutex);
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}
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@@ -780,9 +766,9 @@ pagedresults_cleanup_all(Connection *conn, int needlock)
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if (prp->pr_current_be && prp->pr_search_result_set &&
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prp->pr_current_be->be_search_results_release) {
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prp->pr_current_be->be_search_results_release(&(prp->pr_search_result_set));
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- prp->pr_current_be = NULL;
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rc = 1;
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}
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+ prp->pr_current_be = NULL;
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}
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slapi_ch_free((void **)&conn->c_pagedresults.prl_list);
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conn->c_pagedresults.prl_maxlen = 0;
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--
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1.9.3
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