!258 Fix a segfault on a non-stringable argument to macro call from Lua

From: @hongjinghao 
Reviewed-by: @licunlong 
Signed-off-by: @licunlong

backport-Fix-a-segfault-on-a-non-stringable-argument-to-macro.patch

@@ -0,0 +1,58 @@
+From 856ddc334174fd37fe4ce81bc9f9f11a08cf6c81 Mon Sep 17 00:00:00 2001
+From: Panu Matilainen <pmatilai@redhat.com>
+Date: Fri, 17 Mar 2023 12:53:42 +0200
+Subject: [PATCH] Fix a segfault on a non-stringable argument to macro call
+ from Lua
+
+When natively calling a parametric macro from Lua, with the arguments
+inside a table, we can't assume lua_tostring() always succeeds as it
+can fail eg on a table. Report the error instead of crashing in argvAdd(),
+and add a test as well.
+---
+ rpmio/rpmlua.c    | 9 +++++++--
+ tests/rpmmacro.at | 9 +++++++++
+ 2 files changed, 16 insertions(+), 2 deletions(-)
+
+diff --git a/rpmio/rpmlua.c b/rpmio/rpmlua.c
+index 6c42af792..0e3685713 100644
+--- a/rpmio/rpmlua.c
++++ b/rpmio/rpmlua.c
+@@ -1178,8 +1178,13 @@ static int mc_call(lua_State *L)
+ 
+ 	for (int i = 1; i <= nitem; i++) {
+ 	    lua_rawgeti(L, 1, i);
+-	    argvAdd(&argv, lua_tostring(L, -1));
+-	    lua_pop(L, 1);
++	    const char *s= lua_tostring(L, -1);
++	    if (s) {
++		argvAdd(&argv, s);
++		lua_pop(L, 1);
++	    } else {
++		luaL_argerror(L, i, "cannot convert to string");
++	    }
+ 	}
+ 
+ 	if (rpmExpandThisMacro(*mc, name, argv, &buf, 0) >= 0) {
+diff --git a/tests/rpmmacro.at b/tests/rpmmacro.at
+index 55b7d5fa5..22d873e81 100644
+--- a/tests/rpmmacro.at
++++ b/tests/rpmmacro.at
+@@ -713,6 +713,15 @@ nil
+  1:%{?aaa} 2:%{yyy}
+ that
+ ])
++
++AT_CHECK([[
++runroot rpm \
++	--eval "%{lua:macros.defined({1,2,{}})}"
++]],
++[1],
++[],
++[[error: lua script failed: [string "<lua>"]:1: bad argument #3 to 'defined' (cannot convert to string)
++]])
+ AT_CLEANUP
+ 
+ AT_SETUP([lua macros recursion])
+-- 
+2.33.0
+

rpm.spec

@@ -1,6 +1,6 @@
 Name:          rpm
 Version:       4.18.1
-Release:       4
+Release:       5
 Summary:       RPM Package Manager
 License:       GPLv2+
 URL:           http://www.rpm.org/
@@ -27,6 +27,7 @@ Patch6005: backport-Fix-possible-null-pointer-reference-in-ndb.patch
 Patch6006: backport-Fix-rpmDigestBundleFinal-and-Update-return-code-on-i.patch
 Patch6007: backport-Actually-return-an-error-in-parseScript-if-parsing-f.patch
 Patch6008: backport-Check-inside-root-when-querying-for-files.patch
+Patch6009: backport-Fix-a-segfault-on-a-non-stringable-argument-to-macro.patch
 
 Patch9000: Add-digest-list-plugin.patch
 Patch9001: Add-IMA-digest-list-support.patch
@@ -309,6 +310,9 @@ make clean
 %exclude %{_mandir}/man8/rpmspec.8.gz
 
 %changelog
+* Tue Sep 5 2023 hongjinghao<hongjinghao@huawei.com> - 4.18.1-5
+- Fix a segfault on a non-stringable argument to macro call from Lua
+
 * Tue Aug 29 2023 renhongxun<renhongxun@h-partners.com> - 4.18.1-4
 - Check inside --root when querying for files