source: patches/perl-5.8.8-security_fixes-1.patch@ d89eade

embed.fnc

@@ -1168 +1168 @@
 Es      |regnode*|regclass      |NN struct RExC_state_t *state
 ERs     |I32    |regcurly       |NN const char *
 Es      |regnode*|reg_node      |NN struct RExC_state_t *state|U8 op
+Es      |UV     |reg_recode     |const char value|NULLOK SV **encp
 Es      |regnode*|regpiece      |NN struct RExC_state_t *state|NN I32 *flagp
 Es      |void   |reginsert      |NN struct RExC_state_t *state|U8 op|NN regnode *opnd
 Es      |void   |regoptail      |NN struct RExC_state_t *state|NN regnode *p|NN regnode *val

perl-5.8.8

@@ -1234 +1234 @@
 #define regclass                S_regclass
 #define regcurly                S_regcurly
 #define reg_node                S_reg_node
+#define reg_recode              S_reg_recode
 #define regpiece                S_regpiece
 #define reginsert               S_reginsert
 #define regoptail               S_regoptail
@@ -3277 +3278 @@
 #define regclass(a)             S_regclass(aTHX_ a)
 #define regcurly(a)             S_regcurly(aTHX_ a)
 #define reg_node(a,b)           S_reg_node(aTHX_ a,b)
+#define reg_recode(a,b)         S_reg_recode(aTHX_ a,b)
 #define regpiece(a,b)           S_regpiece(aTHX_ a,b)
 #define reginsert(a,b,c)        S_reginsert(aTHX_ a,b,c)
 #define regoptail(a,b,c)        S_regoptail(aTHX_ a,b,c)

pod/perldiag.pod

@@ -1900 +1900 @@
 (W printf) Perl does not understand the given format conversion.  See
 L<perlfunc/sprintf>.
 
+=item Invalid escape in the specified encoding in regex; marked by <-- HERE in m/%s/
+
+(W regexp) The numeric escape (for example C<\xHH>) of value < 256
+didn't correspond to a single character through the conversion
+from the encoding specified by the encoding pragma.
+The escape was replaced with REPLACEMENT CHARACTER (U+FFFD) instead.
+The <-- HERE shows in the regular expression about where the
+escape was discovered.
+
 =item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/
 
 (F) The range specified in a character class had a minimum character

perl-5.8.8

@@ -1748 +1748 @@
                         __attribute__warn_unused_result__;
 
 STATIC regnode* S_reg_node(pTHX_ struct RExC_state_t *state, U8 op);
+STATIC UV       S_reg_recode(pTHX_ const char value, SV **encp);
 STATIC regnode* S_regpiece(pTHX_ struct RExC_state_t *state, I32 *flagp);
 STATIC void     S_reginsert(pTHX_ struct RExC_state_t *state, U8 op, regnode *opnd);
 STATIC void     S_regoptail(pTHX_ struct RExC_state_t *state, regnode *p, regnode *val);

regcomp.c

@@ -136 +136 @@
     I32         seen_zerolen;
     I32         seen_evals;
     I32         utf8;
+    I32         orig_utf8;
 #if ADD_TO_REGEXEC
     char        *starttry;              /* -Dr: where regtry was called. */
 #define RExC_starttry   (pRExC_state->starttry)
@@ -161 +162 @@
 #define RExC_seen_zerolen       (pRExC_state->seen_zerolen)
 #define RExC_seen_evals (pRExC_state->seen_evals)
 #define RExC_utf8       (pRExC_state->utf8)
+#define RExC_orig_utf8 (pRExC_state->orig_utf8)
 
 #define ISMULT1(c)      ((c) == '*' || (c) == '+' || (c) == '?')
 #define ISMULT2(s)      ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
@@ -1749 +1751 @@
     if (exp == NULL)
         FAIL("NULL regexp argument");
 
-    RExC_utf8 = pm->op_pmdynflags & PMdf_CMP_UTF8;
+    RExC_orig_utf8 = RExC_utf8 = pm->op_pmdynflags & PMdf_CMP_UTF8;
 
-    RExC_precomp = exp;
     DEBUG_r({
          if (!PL_colorset) reginitcolors();
          PerlIO_printf(Perl_debug_log, "%sCompiling REx%s `%s%*s%s'\n",
                        PL_colors[4],PL_colors[5],PL_colors[0],
-                       (int)(xend - exp), RExC_precomp, PL_colors[1]);
+                       (int)(xend - exp), exp, PL_colors[1]);
     });
+
+redo_first_pass:
+    RExC_precomp = exp;
     RExC_flags = pm->op_pmflags;
     RExC_sawback = 0;
 
@@ -1783 +1787 @@
         RExC_precomp = Nullch;
         return(NULL);
     }
+    if (RExC_utf8 && !RExC_orig_utf8) {
+        STRLEN len = xend-exp;
+        DEBUG_r(PerlIO_printf(Perl_debug_log,
+           "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
+        exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
+        xend = exp + len;
+        RExC_orig_utf8 = RExC_utf8;
+        SAVEFREEPV(exp);
+        goto redo_first_pass;
+    }
+
     DEBUG_r(PerlIO_printf(Perl_debug_log, "size %"IVdf" ", (IV)RExC_size));
 
     /* Small enough for pointer-storage convention?
@@ -2775 +2790 @@
 }
 
 /*
+ * reg_recode
+ *
+ * It returns the code point in utf8 for the value in *encp.
+ *    value: a code value in the source encoding
+ *    encp:  a pointer to an Encode object
+ *
+ * If the result from Encode is not a single character,
+ * it returns U+FFFD (Replacement character) and sets *encp to NULL.
+ */
+STATIC UV
+S_reg_recode(pTHX_ const char value, SV **encp)
+{
+    STRLEN numlen = 1;
+    SV * const sv = sv_2mortal(newSVpvn(&value, numlen));
+    const char * const s = encp && *encp ? sv_recode_to_utf8(sv, *encp)
+                                         : SvPVX(sv);
+    const STRLEN newlen = SvCUR(sv);
+    UV uv = UNICODE_REPLACEMENT;
+
+    if (newlen)
+        uv = SvUTF8(sv)
+             ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
+             : *(U8*)s;
+
+    if (!newlen || numlen != newlen) {
+        uv = UNICODE_REPLACEMENT;
+        if (encp)
+            *encp = NULL;
+    }
+    return uv;
+}
+
+/*
  - regatom - the lowest level
  *
  * Optimization:  gobbles an entire sequence of ordinary characters so that
@@ -3166 +3214 @@
                             ender = grok_hex(p, &numlen, &flags, NULL);
                             p += numlen;
                         }
+                        if (PL_encoding && ender < 0x100)
+                            goto recode_encoding;
                         break;
                     case 'c':
                         p++;
@@ -3185 +3235 @@
                             --p;
                             goto loopdone;
                         }
+                        if (PL_encoding && ender < 0x100)
+                            goto recode_encoding;
+                        break;
+                    recode_encoding:
+                        {
+                            SV* enc = PL_encoding;
+                            ender = reg_recode((const char)(U8)ender, &enc);
+                            if (!enc && SIZE_ONLY && ckWARN(WARN_REGEXP))
+                                vWARN(p, "Invalid escape in the specified encoding");
+                            RExC_utf8 = 1;
+                        }
                         break;
                     case '\0':
                         if (p >= RExC_end)
@@ -3315 +3376 @@
         break;
     }
 
-    /* If the encoding pragma is in effect recode the text of
-     * any EXACT-kind nodes. */
-    if (PL_encoding && PL_regkind[(U8)OP(ret)] == EXACT) {
-        STRLEN oldlen = STR_LEN(ret);
-        SV *sv        = sv_2mortal(newSVpvn(STRING(ret), oldlen));
-
-        if (RExC_utf8)
-            SvUTF8_on(sv);
-        if (sv_utf8_downgrade(sv, TRUE)) {
-            const char * const s = sv_recode_to_utf8(sv, PL_encoding);
-            const STRLEN newlen = SvCUR(sv);
-
-            if (SvUTF8(sv))
-                RExC_utf8 = 1;
-            if (!SIZE_ONLY) {
-                DEBUG_r(PerlIO_printf(Perl_debug_log, "recode %*s to %*s\n",
-                                      (int)oldlen, STRING(ret),
-                                      (int)newlen, s));
-                Copy(s, STRING(ret), newlen, char);
-                STR_LEN(ret) += newlen - oldlen;
-                RExC_emit += STR_SZ(newlen) - STR_SZ(oldlen);
-            } else
-                RExC_size += STR_SZ(newlen) - STR_SZ(oldlen);
-        }
-    }
-
     return(ret);
 }
 
@@ -3718 +3753 @@
                     value = grok_hex(RExC_parse, &numlen, &flags, NULL);
                     RExC_parse += numlen;
                 }
+                if (PL_encoding && value < 0x100)
+                    goto recode_encoding;
                 break;
             case 'c':
                 value = UCHARAT(RExC_parse++);
@@ -3725 +3762 @@
                 break;
             case '0': case '1': case '2': case '3': case '4':
             case '5': case '6': case '7': case '8': case '9':
-            {
-                I32 flags = 0;
-                numlen = 3;
-                value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
-                RExC_parse += numlen;
-                break;
-            }
+                {
+                    I32 flags = 0;
+                    numlen = 3;
+                    value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
+                    RExC_parse += numlen;
+                    if (PL_encoding && value < 0x100)
+                        goto recode_encoding;
+                    break;
+                }
+            recode_encoding:
+                {
+                    SV* enc = PL_encoding;
+                    value = reg_recode((const char)(U8)value, &enc);
+                    if (!enc && SIZE_ONLY && ckWARN(WARN_REGEXP))
+                        vWARN(RExC_parse,
+                              "Invalid escape in the specified encoding");
+                    break;
+                }
             default:
                 if (!SIZE_ONLY && isALPHA(value) && ckWARN(WARN_REGEXP))
                     vWARN2(RExC_parse,

t/uni/tr_utf8.t

@@ -31 +31 @@
 }
 
 use strict;
-use Test::More tests => 7;
+use Test::More tests => 8;
 
 use encoding 'utf8';
 
@@ -67 +67 @@
   $line =~ tr/bcdeghijklmnprstvwxyz$02578/×‘×Š×“×¢×’×”×™×²×§×œ×ž× ×€ÖŒ×š×¡×˜×°×©×›×™×–×©×±×ª×²×—×/;
   is($line, "aב׊דעf×’×”×™×²×§×œ×ž× o×€q֌ךסuטװשכיזש1×±34ת6ײח9", "[perl #16843]");
 }
+
+{
+  # [perl #40641]
+  my $str = qq/GebÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀude/;
+  my $reg = qr/GebÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀude/;
+  ok($str =~ /$reg/, "[perl #40641]");
+}
+
 __END__

perl-5.8.8

@@ -198 +198 @@
                                          UTF8_ALLOW_SURROGATE|UTF8_ALLOW_FFFF)
 #define UTF8_ALLOW_ANY                  0x00FF
 #define UTF8_CHECK_ONLY                 0x0200
+#define UTF8_ALLOW_DEFAULT             (ckWARN(WARN_UTF8) ? 0 : \
+                                        UTF8_ALLOW_ANYUV)
 
 #define UNICODE_SURROGATE_FIRST         0xD800
 #define UNICODE_SURROGATE_LAST          0xDFFF