perl: Security fix CVE-2017-12883

Affects: Perl  < 5.24.3-rc1 and  5.26.x before 5.26.1-RC1

Signed-off-by: Armin Kuster <[email protected]>
Signed-off-by: Ross Burton <[email protected]>

meta/recipes-devtools/perl/perl/CVE-2017-12883.patch

@@ -0,0 +1,44 @@
+From 40b3cdad3649334585cee8f4630ec9a025e62be6 Mon Sep 17 00:00:00 2001
+From: Karl Williamson <[email protected]>
+Date: Fri, 25 Aug 2017 11:33:58 -0600
+Subject: [PATCH] PATCH: [perl #131598]
+
+The cause of this is that the vFAIL macro uses RExC_parse, and that
+variable has just been changed in preparation for code after the vFAIL.
+The solution is to not change RExC_parse until after the vFAIL.
+
+This is a case where the macro hides stuff that can bite you.
+
+(cherry picked from commit 2be4edede4ae226e2eebd4eff28cedd2041f300f)
+
+Upstream-Status: Backport
+CVE: CVE-2017-12833
+Signed-off-by: Armin Kuster <[email protected]>
+
+---
+ regcomp.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+Index: perl-5.24.1/regcomp.c
+===================================================================
+--- perl-5.24.1.orig/regcomp.c
++++ perl-5.24.1/regcomp.c
+@@ -11918,14 +11918,16 @@ S_grok_bslash_N(pTHX_ RExC_state_t *pREx
+ 	}
+         sv_catpv(substitute_parse, ")");
+
+-        RExC_parse = RExC_start = RExC_adjusted_start = SvPV(substitute_parse,
+-                                                             len);
++        len = SvCUR(substitute_parse);
+
+ 	/* Don't allow empty number */
+ 	if (len < (STRLEN) 8) {
+             RExC_parse = endbrace;
+ 	    vFAIL("Invalid hexadecimal number in \\N{U+...}");
+ 	}
++
++        RExC_parse = RExC_start = RExC_adjusted_start
++                                              = SvPV_nolen(substitute_parse);
+ 	RExC_end = RExC_parse + len;
+
+         /* The values are Unicode, and therefore not subject to recoding, but

meta/recipes-devtools/perl/perl_5.24.1.bb

@@ -64,6 +64,7 @@ SRC_URI += " \
         file://perl-fix-conflict-between-skip_all-and-END.patch \
         file://perl-test-customized.patch \
         file://perl-5.26.1-guard_old_libcrypt_fix.patch \
+        file://CVE-2017-12883.patch \
 "
 
 # Fix test case issues