lua: fix CVE-2022-28805

singlevar in lparser.c in Lua through 5.4.4 lacks a certain luaK_exp2anyregup
call, leading to a heap-based buffer over-read that might affect a system that
compiles untrusted Lua code.

https://nvd.nist.gov/vuln/detail/CVE-2022-28805

(From OE-Core rev: d2ba3b8)

Signed-off-by: Sana Kazi <sana.kazi@kpit.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 91e14d3a8e6e67267047473f5c449f266b44f354)
Signed-off-by: Omkar Patil <omkar.patil@kpit.com>
Signed-off-by: Omkar Patil <omkarpatil10.93@gmail.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-devtools/lua/lua/0001-lua-fix-CVE-2022-28805.patch

@@ -0,0 +1,73 @@
+From a38684e4cb4e1439e5f2f7370724496d5b363b32 Mon Sep 17 00:00:00 2001
+From: Steve Sakoman <steve@sakoman.com>
+Date: Mon, 18 Apr 2022 09:04:08 -1000
+Subject: [PATCH] lua: fix CVE-2022-28805
+
+singlevar in lparser.c in Lua through 5.4.4 lacks a certain luaK_exp2anyregup
+call, leading to a heap-based buffer over-read that might affect a system that
+compiles untrusted Lua code.
+
+https://nvd.nist.gov/vuln/detail/CVE-2022-28805
+
+(From OE-Core rev: d2ba3b8850d461bc7b773240cdf15b22b31a3f9e)
+
+Signed-off-by: Sana Kazi <sana.kazi@kpit.com>
+Signed-off-by: Steve Sakoman <steve@sakoman.com>
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+(cherry picked from commit 91e14d3a8e6e67267047473f5c449f266b44f354)
+Signed-off-by: Omkar Patil <omkar.patil@kpit.com>
+---
+ .../lua/lua/CVE-2022-28805.patch              | 28 +++++++++++++++++++
+ meta-oe/recipes-devtools/lua/lua_5.3.6.bb     |  1 +
+ 2 files changed, 29 insertions(+)
+ create mode 100644 meta-oe/recipes-devtools/lua/lua/CVE-2022-28805.patch
+
+diff --git a/meta-oe/recipes-devtools/lua/lua/CVE-2022-28805.patch b/meta-oe/recipes-devtools/lua/lua/CVE-2022-28805.patch
+new file mode 100644
+index 000000000..0a21d1ce7
+--- /dev/null
++++ b/meta-oe/recipes-devtools/lua/lua/CVE-2022-28805.patch
+@@ -0,0 +1,28 @@
++From 1f3c6f4534c6411313361697d98d1145a1f030fa Mon Sep 17 00:00:00 2001
++From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
++Date: Tue, 15 Feb 2022 12:28:46 -0300
++Subject: [PATCH] Bug: Lua can generate wrong code when _ENV is <const>
++
++CVE: CVE-2022-28805
++
++Upstream-Status: Backport [https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa]
++
++Signed-off-by: Sana Kazi <sana.kazi@kpit.com>
++Signed-off-by: Steve Sakoman <steve@sakoman.com>
++---
++ src/lparser.c         |  1 +
++ 1 files changed, 1 insertions(+)
++
++diff --git a/src/lparser.c b/src/lparser.c
++index 3abe3d751..a5cd55257 100644
++--- a/src/lparser.c
+++++ b/src/lparser.c
++@@ -300,6 +300,7 @@
++     expdesc key;
++     singlevaraux(fs, ls->envn, var, 1);  /* get environment variable */
++     lua_assert(var->k != VVOID);  /* this one must exist */
+++    luaK_exp2anyregup(fs, var);  /* but could be a constant */
++     codestring(ls, &key, varname);  /* key is variable name */
++     luaK_indexed(fs, var, &key);  /* env[varname] */
++   }
++
+diff --git a/meta-oe/recipes-devtools/lua/lua_5.3.6.bb b/meta-oe/recipes-devtools/lua/lua_5.3.6.bb
+index 342ed1b54..0137cc3c5 100644
+--- a/meta-oe/recipes-devtools/lua/lua_5.3.6.bb
++++ b/meta-oe/recipes-devtools/lua/lua_5.3.6.bb
+@@ -10,6 +10,7 @@ SRC_URI = "http://www.lua.org/ftp/lua-${PV}.tar.gz;name=tarballsrc \
+            file://CVE-2020-15888.patch \
+            file://CVE-2020-15945.patch \
+            file://0001-Fixed-bug-barriers-cannot-be-active-during-sweep.patch \
++           file://CVE-2022-28805.patch \
+            "
+
+ # if no test suite matches PV release of Lua exactly, download the suite for the closest Lua release.
+-- 
+2.17.1
+

meta-oe/recipes-devtools/lua/lua/CVE-2022-28805.patch

@@ -0,0 +1,28 @@
+From 1f3c6f4534c6411313361697d98d1145a1f030fa Mon Sep 17 00:00:00 2001
+From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
+Date: Tue, 15 Feb 2022 12:28:46 -0300
+Subject: [PATCH] Bug: Lua can generate wrong code when _ENV is <const>
+
+CVE: CVE-2022-28805
+
+Upstream-Status: Backport [https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa]
+
+Signed-off-by: Sana Kazi <sana.kazi@kpit.com>
+Signed-off-by: Steve Sakoman <steve@sakoman.com>
+---
+ src/lparser.c         |  1 +
+ 1 files changed, 1 insertions(+)
+
+diff --git a/src/lparser.c b/src/lparser.c
+index 3abe3d751..a5cd55257 100644
+--- a/src/lparser.c
++++ b/src/lparser.c
+@@ -300,6 +300,7 @@
+     expdesc key;
+     singlevaraux(fs, ls->envn, var, 1);  /* get environment variable */
+     lua_assert(var->k != VVOID);  /* this one must exist */
++    luaK_exp2anyregup(fs, var);  /* but could be a constant */
+     codestring(ls, &key, varname);  /* key is variable name */
+     luaK_indexed(fs, var, &key);  /* env[varname] */
+   }
+

meta-oe/recipes-devtools/lua/lua_5.3.6.bb

@@ -10,6 +10,7 @@ SRC_URI = "http://www.lua.org/ftp/lua-${PV}.tar.gz;name=tarballsrc \
            file://CVE-2020-15888.patch \
            file://CVE-2020-15945.patch \
            file://0001-Fixed-bug-barriers-cannot-be-active-during-sweep.patch \
+           file://CVE-2022-28805.patch \
            "
 
 # if no test suite matches PV release of Lua exactly, download the suite for the closest Lua release.