!11 fix gdbm_errno overlay from gdbm_close

From: @wangchen2020
Reviewed-by: @licihua
Signed-off-by: @licihua

backport-db_gdbm-fix-gdbm_errno-overlay-from-gdbm_close.patch

@@ -0,0 +1,32 @@
+From af48f6fec9a7b6374d4153c5db894d4a1f349645 Mon Sep 17 00:00:00 2001
+From: Jonas Jelten <jj@sft.mx>
+Date: Sat, 2 Feb 2019 20:53:37 +0100
+Subject: [PATCH] db_gdbm: fix gdbm_errno overlay from gdbm_close
+
+`gdbm_close` also sets gdbm_errno since version 1.17.
+This leads to a problem in `libsasl` as the `gdbm_close` incovation overlays
+the `gdbm_errno` value which is then later used for the error handling.
+---
+ sasldb/db_gdbm.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/sasldb/db_gdbm.c b/sasldb/db_gdbm.c
+index ee56a6b..c908808 100644
+--- a/sasldb/db_gdbm.c
++++ b/sasldb/db_gdbm.c
+@@ -107,9 +107,11 @@ int _sasldb_getdata(const sasl_utils_t *utils,
+   gkey.dptr = key;
+   gkey.dsize = key_len;
+   gvalue = gdbm_fetch(db, gkey);
++  int fetch_errno = gdbm_errno;
++
+   gdbm_close(db);
+   if (! gvalue.dptr) {
+-      if (gdbm_errno == GDBM_ITEM_NOT_FOUND) {
++      if (fetch_errno == GDBM_ITEM_NOT_FOUND) {
+           utils->seterror(conn, SASL_NOLOG,
+ 			  "user: %s@%s property: %s not found in %s",
+ 			  authid, realm, propName, path);
+-- 
+1.8.3.1
+

cyrus-sasl.spec

@@ -6,7 +6,7 @@
 
 Name: cyrus-sasl
 Version: 2.1.27
-Release: 11
+Release: 12
 Summary: The Cyrus SASL API Implementation
 
 License: BSD with advertising
@@ -17,6 +17,7 @@ Source2: saslauthd.sysconfig
 
 Patch0: 0003-Prevent-double-free-of-RC4-context.patch
 Patch1: fix-CVE-2019-19906.patch
+Patch2: backport-db_gdbm-fix-gdbm_errno-overlay-from-gdbm_close.patch
 
 BuildRequires: autoconf, automake, libtool, gdbm-devel, groff
 BuildRequires: krb5-devel >= 1.2.2, openssl-devel, pam-devel, pkgconfig
@@ -259,6 +260,9 @@ getent passwd %{username} >/dev/null || useradd -r -g %{username} -d %{homedir}
 
 
 %changelog
+* Wed May 12 2021 wangchen <wangchen137@huawei.com> - 2.1.27-12
+- fix gdbm_errno overlay from gdbm_close
+
 * Fri Jan 8 2021 yangzhuangzhuang <yangzhuangzhuang1@huawei.com> - 2.1.27-11
 - BuildRequires: replace libdb with gdbm