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From 9ace3a7899e6b3753ef428088303e0a646db4096 Mon Sep 17 00:00:00 2001
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From: Alexey Tikhonov <atikhono@redhat.com>
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Date: Sun, 22 Nov 2020 17:44:07 +0100
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Subject: [PATCH] SYSDB: merge_res_sysdb_attrs() fixed to avoid NULL ptr in
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msgs[]
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This helps to avoid sssd_be segfaults at be_refresh_get_values_ex() due to NULL
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ptrs in results of sysdb_search_with_ts_attr()
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Resolves: https://github.com/SSSD/sssd/issues/5412
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Reviewed-by: Pavel Březina <pbrezina@redhat.com>
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(cherry picked from commit ff24d1538af88f83d0a3cc2817952cf70e7ca580)
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---
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src/db/sysdb_search.c | 11 +++++++----
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1 file changed, 7 insertions(+), 4 deletions(-)
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diff --git a/src/db/sysdb_search.c b/src/db/sysdb_search.c
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index 6c89b4c98..7939944ba 100644
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--- a/src/db/sysdb_search.c
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+++ b/src/db/sysdb_search.c
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@@ -221,6 +221,7 @@ static errno_t merge_res_sysdb_attrs(TALLOC_CTX *mem_ctx,
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const char *attrs[])
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{
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errno_t ret;
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+ size_t ts_cache_res_count = 0;
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struct ldb_result *ts_cache_res = NULL;
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if (ts_res == NULL || ctx->ldb_ts == NULL) {
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@@ -231,7 +232,6 @@ static errno_t merge_res_sysdb_attrs(TALLOC_CTX *mem_ctx,
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if (ts_cache_res == NULL) {
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return ENOMEM;
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}
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- ts_cache_res->count = ts_res->count;
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ts_cache_res->msgs = talloc_zero_array(ts_cache_res,
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struct ldb_message *,
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ts_res->count);
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@@ -244,15 +244,18 @@ static errno_t merge_res_sysdb_attrs(TALLOC_CTX *mem_ctx,
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ret = merge_msg_sysdb_attrs(ts_cache_res->msgs,
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ctx,
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ts_res->msgs[c],
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- &ts_cache_res->msgs[c], attrs);
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- if (ret != EOK) {
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+ &ts_cache_res->msgs[ts_cache_res_count],
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+ attrs);
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+ if ((ret != EOK) || (ts_cache_res->msgs[ts_cache_res_count] == NULL)) {
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DEBUG(SSSDBG_MINOR_FAILURE,
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"Cannot merge sysdb cache values for %s\n",
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ldb_dn_get_linearized(ts_res->msgs[c]->dn));
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- /* non-fatal, we just get only the non-timestamp attrs */
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+ /* non-fatal, just skip */
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continue;
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}
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+ ts_cache_res_count += 1;
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}
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+ ts_cache_res->count = ts_cache_res_count;
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*_ts_cache_res = ts_cache_res;
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return EOK;
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--
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2.21.3
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