Fix a performance regression while using large number of environment variables

Resolves: RHEL-20020
Signed-off-by: Siteshwar Vashisht <svashisht@redhat.com>
Signed-off-by: Zhao Mengmeng <zhaomengmeng@kylinos.cn>

backport-Fix-a-performance-regression-while-using-large-numbe.patch

@@ -0,0 +1,31 @@
+From b1764f8226260d5b58958d613c7654f01e624dca Mon Sep 17 00:00:00 2001
+From: Zhao Mengmeng <zhaomengmeng@kylinos.cn>
+Date: Mon, 3 Jun 2024 16:49:46 +0800
+Subject: [PATCH] Fix a performance regression while using large number of
+ environment variables
+
+Resolves: RHEL-20020
+Signed-off-by: Siteshwar Vashisht <svashisht@redhat.com>
+---
+ execute_cmd.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/execute_cmd.c b/execute_cmd.c
+index 71d147c..2e33722 100644
+--- a/execute_cmd.c
++++ b/execute_cmd.c
+@@ -5482,11 +5482,7 @@ execute_disk_command (words, redirects, command_line, pipe_in, pipe_out,
+     {
+       /* If we're optimizing out the fork (implicit `exec'), decrement the
+ 	 shell level like `exec' would do. */
+-#if 0 /* TAG: bash-5.2 psmith 10/11/2020 */
+       if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE && (subshell_environment & SUBSHELL_PIPE) == 0)
+-#else
+-      if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE)
+-#endif
+ 	adjust_shell_level (-1);
+ 
+       maybe_make_export_env ();
+-- 
+2.33.0
+

bash.spec

@@ -1,6 +1,6 @@
 Name:     bash
 Version:  5.1.8
-Release:  14
+Release:  15
 Summary:  It is the Bourne Again Shell
 License:  GPLv3
 URL:      https://www.gnu.org/software/bash
@@ -45,6 +45,7 @@ Patch6014: backport-fixes-for-LINENO-in-multi-line-simple-commands-print.patch
 Patch6015: backport-changes-to-SIGINT-handler-while-waiting-for-a-child-.patch
 Patch6016: backport-renamed-several-functions-beginning-with-legal_-chan.patch
 Patch6017: backport-fix-for-cd-when-curent-directory-doesn-t-exist-fix-w.patch
+Patch6018: backport-Fix-a-performance-regression-while-using-large-numbe.patch
 
 BuildRequires: gcc bison texinfo autoconf ncurses-devel
 # Required for bash tests
@@ -138,6 +139,12 @@ make check
 %exclude %{_infodir}/dir
 
 %changelog
+* Mon Jun 03 2024 Zhao Mengmeng <zhaomengmeng@kylinos.cn> - 5.1.8-15
+- Type:bugfix
+- CVE:NA
+- SUG:NA
+- DESC: Fix a performance regression while using large number of environment variables
+
 * Fri Mar 29 2024 wangyuhang<wangyuhang27@huawei.com> - 5.1.8-14
 - fix some overflows in printf