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From df5000efced2d00aa0fc6546fcf6fc7b02e27256 Mon Sep 17 00:00:00 2001
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From: Mark Reynolds <mreynolds@redhat.com>
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Date: Mon, 6 Nov 2017 22:30:55 -0500
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Subject: [PATCH] Ticket 49441 - Import crashes with large indexed binary
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attributes
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Bug Description: Importing an ldif file that contains entries with large
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binary attributes that are indexed crashes the server.
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The crash occurs when "encoding" the binary value to a
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string for debug logging, where we "underflow" the buffer
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space index which then allows the string buffer to overflow.
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Fix Description: While filling the string buffer with the encoded binary
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value we need to make sure if the buffer space is greater
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than zero before decrementing it.
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Also check if trace logging is being used before we actually
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call the logging function which calls the "encoded" function
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first. This way we avoid this costly "encoding" on every
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index call we make.
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https://pagure.io/389-ds-base/issue/49441
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Reviewed by: firstyear(Thanks!)
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---
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ldap/servers/slapd/back-ldbm/index.c | 21 ++++++++++-----------
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1 file changed, 10 insertions(+), 11 deletions(-)
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diff --git a/ldap/servers/slapd/back-ldbm/index.c b/ldap/servers/slapd/back-ldbm/index.c
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index d4de28ca3..d62052a22 100644
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--- a/ldap/servers/slapd/back-ldbm/index.c
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+++ b/ldap/servers/slapd/back-ldbm/index.c
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@@ -808,7 +808,10 @@ encode (const struct berval* data, char buf[BUFSIZ])
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bufSpace -= (s - first);
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}
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do {
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- *bufNext++ = '\\'; --bufSpace;
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+ if (bufSpace) {
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+ *bufNext++ = '\\';
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+ --bufSpace;
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+ }
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if (bufSpace < 2) {
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memcpy (bufNext, "..", 2);
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bufNext += 2;
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@@ -903,8 +906,10 @@ index_read_ext_allids(
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slapi_log_err(SLAPI_LOG_ERR, "index_read_ext_allids", "NULL prefix\n");
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return NULL;
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}
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- slapi_log_err(SLAPI_LOG_TRACE, "index_read_ext_allids", "=> ( \"%s\" %s \"%s\" )\n",
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- type, prefix, encode (val, buf));
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+ if (slapi_is_loglevel_set(LDAP_DEBUG_TRACE)) {
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+ slapi_log_err(SLAPI_LOG_TRACE, "index_read_ext_allids", "=> ( \"%s\" %s \"%s\" )\n",
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+ type, prefix, encode (val, buf));
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+ }
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basetype = typebuf;
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if ( (basetmp = slapi_attr_basetype( type, typebuf, sizeof(typebuf) ))
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@@ -1737,16 +1742,13 @@ addordel_values(
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*/
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key.flags = DB_DBT_USERMEM;
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key.ulen = tmpbuflen;
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-#ifdef LDAP_ERROR_LOGGING
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- /* XXX if ( slapd_ldap_debug & LDAP_DEBUG_TRACE ) XXX */
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- {
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+ if (slapi_is_loglevel_set(LDAP_DEBUG_TRACE)) {
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char encbuf[BUFSIZ];
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slapi_log_err(SLAPI_LOG_TRACE, "addordel_values", "%s_value(\"%s\")\n",
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(flags & BE_INDEX_ADD) ? "add" : "del",
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encoded (&key, encbuf));
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}
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-#endif
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if (NULL != txn) {
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db_txn = txn->back_txn_txn;
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@@ -1907,16 +1909,13 @@ addordel_values_sv(
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*/
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key.flags = DB_DBT_USERMEM;
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key.ulen = tmpbuflen;
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-#ifdef LDAP_ERROR_LOGGING
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- /* XXX if ( slapd_ldap_debug & LDAP_DEBUG_TRACE ) XXX */
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- {
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+ if (slapi_is_loglevel_set(LDAP_DEBUG_TRACE)) {
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char encbuf[BUFSIZ];
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slapi_log_err(SLAPI_LOG_TRACE, "addordel_values_sv", "%s_value(\"%s\")\n",
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(flags & BE_INDEX_ADD) ? "add" : "del",
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encoded (&key, encbuf));
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}
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-#endif
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if (NULL != txn) {
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db_txn = txn->back_txn_txn;
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--
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2.13.6
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