[PATCH 2/2] vim: Security Fix For CVE-2022-1420

[Rahul Chauhan <rahulchauhankitps@gmail.com>]

CVE: CVE-2022-1420

Signed-off-by: Rahul Chauhan <rahulchauhankitps@gmail.com>
---
 .../vim/files/CVE-2022-1420.patch             | 93 +++++++++++++++++++
 meta/recipes-support/vim/vim.inc              |  1 +
 2 files changed, 94 insertions(+)
 create mode 100644 meta/recipes-support/vim/files/CVE-2022-1420.patch

diff --git a/meta/recipes-support/vim/files/CVE-2022-1420.patch b/meta/recipes-support/vim/files/CVE-2022-1420.patch
new file mode 100644
index 0000000000..2c2e09a9d2
--- /dev/null
+++ b/meta/recipes-support/vim/files/CVE-2022-1420.patch
@@ -0,0 +1,93 @@
+From 6258e29cbdc55c9496baa23462ef77d79a4e08cf Mon Sep 17 00:00:00 2001
+From: Bram Moolenaar <Bram@vim.org>
+Date: Sun, 17 Apr 2022 15:06:35 +0100
+Subject: [PATCH] patch 8.2.4774: crash when using a number for lambda name
+
+Problem:    Crash when using a number for lambda name.
+Solution:   Check the type of the lambda reference.
+
+Upstream-Status: Backport [https://github.com/vim/vim/commit/8b91e71441069b1dde9ac9ff9d9a829b1b4aecca]
+CVE-2022-1420
+
+Signed-off-by: Rahul Chauhan <rahulchauhankitps@gmail.com>
+---
+ src/errors.h                |  4 ++++
+ src/eval.c                  | 16 ++++++++++------
+ src/testdir/test_lambda.vim |  4 ++++
+ src/version.c               |  2 ++
+ 4 files changed, 20 insertions(+), 6 deletions(-)
+
+diff --git a/src/errors.h b/src/errors.h
+index 951acabb2..96bba755b 100644
+--- a/src/errors.h
++++ b/src/errors.h
+@@ -3256,3 +3256,7 @@ EXTERN char e_compiling_closure_without_context_str[]
+ EXTERN char e_using_type_not_in_script_context_str[]
+ 	INIT(= N_("E1272: Using type not in a script context: %s"));
+ #endif
++#ifdef FEAT_EVAL
++EXTERN char e_string_or_function_required_for_arrow_parens_expr[]
++       INIT(= N_("E1275: String or function required for ->(expr)"));
++#endif
+diff --git a/src/eval.c b/src/eval.c
+index 2cde64216..5d208a378 100644
+--- a/src/eval.c
++++ b/src/eval.c
+@@ -4094,19 +4094,23 @@ eval_lambda(
+ 	++*arg;
+ 	ret = eval1(arg, rettv, evalarg);
+ 	*arg = skipwhite_and_linebreak(*arg, evalarg);
+-	if (**arg == ')')
++	if (**arg != ')')
+ 	{
+-	    ++*arg;
++	    emsg(_(e_missing_closing_paren));
++	    return FAIL;
+ 	}
+-	else
++	if (rettv->v_type != VAR_STRING && rettv->v_type != VAR_FUNC
++					       && rettv->v_type != VAR_PARTIAL)
+ 	{
+-	    emsg(_(e_missing_closing_paren));
+-	    ret = FAIL;
++	    emsg(_(e_string_or_function_required_for_arrow_parens_expr));
++	    return FAIL;
+ 	}
++	++*arg;
+     }
+     if (ret != OK)
+ 	return FAIL;
+-    else if (**arg != '(')
++
++    if (**arg != '(')
+     {
+ 	if (verbose)
+ 	{
+diff --git a/src/testdir/test_lambda.vim b/src/testdir/test_lambda.vim
+index e6dcb6774..8d06e5973 100644
+--- a/src/testdir/test_lambda.vim
++++ b/src/testdir/test_lambda.vim
+@@ -66,6 +66,10 @@ function Test_lambda_fails()
+   echo assert_fails('echo 10->{a -> a + 2}', 'E107:')
+ 
+   call assert_fails('eval 0->(', "E110: Missing ')'")
++  call assert_fails('eval 0->(3)()', "E1275:")
++  call assert_fails('eval 0->([3])()', "E1275:")
++  call assert_fails('eval 0->({"a": 3})()', "E1275:")
++  call assert_fails('eval 0->(xxx)()', "E121:")
+ endfunc
+ 
+ func Test_not_lamda()
+diff --git a/src/version.c b/src/version.c
+index 38c3e69b6..c7516e3a5 100644
+--- a/src/version.c
++++ b/src/version.c
+@@ -750,6 +750,8 @@ static char *(features[]) =
+ 
+ static int included_patches[] =
+ {   /* Add new patch number below this line */
++/**/
++    4774,
+ /**/
+     4763,
+ /**/
diff --git a/meta/recipes-support/vim/vim.inc b/meta/recipes-support/vim/vim.inc
index c78e53007e..05891b07df 100644
--- a/meta/recipes-support/vim/vim.inc
+++ b/meta/recipes-support/vim/vim.inc
@@ -20,6 +20,7 @@ SRC_URI = "git://github.com/vim/vim.git;branch=master;protocol=https \
            file://no-path-adjust.patch \
            file://racefix.patch \
            file://CVE-2022-1381.patch \
+           file://CVE-2022-1420.patch \
            "
 
 PV .= ".4681"
-- 
2.17.1