Fix segfault when pcre_dfa_exec() is called with an output vector of length

less than 2.


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1334 2f5784b3-3f2a-0410-8824-cb99058d5e15

7 files changed, 35 insertions, 25 deletions

diff --git a/ChangeLog b/ChangeLog
index 0766c2d..3805304 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -158,10 +158,13 @@ Version 8.33 28-April-2013
 
 42. Data lines longer than 65536 caused pcretest to crash.
 
-44. Clarified the data type for length and startoffset arguments for pcre_exec 
+43. Clarified the data type for length and startoffset arguments for pcre_exec 
     and pcre_dfa_exec in the function-specific man pages, where they were 
     explicitly stated to be in bytes, never having been updated. I also added 
     some clarification to the pcreapi man page.
+    
+44. A call to pcre_dfa_exec() with an output vector size less than 2 caused
+    a segmentation fault. 
 
 
 Version 8.32 30-November-2012
diff --git a/pcre_dfa_exec.c b/pcre_dfa_exec.c
index 8211760..02bd3f0 100644
--- a/pcre_dfa_exec.c
+++ b/pcre_dfa_exec.c
@@ -636,7 +636,7 @@ for (;;)
     const pcre_uchar *code;
     int state_offset = current_state->offset;
     int codevalue, rrc;
-    unsigned int count;
+    int count;
 
 #ifdef PCRE_DEBUG
     printf ("%.*sProcessing state %d c=", rlevel*2-2, SP, state_offset);
@@ -1255,7 +1255,7 @@ for (;;)
               (d != OP_ANY || !IS_NEWLINE(ptr)) &&
               ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
           {
-          if (++count >= GET2(code, 1))
+          if (++count >= (int)GET2(code, 1))
             { ADD_NEW(state_offset + 1 + IMM2_SIZE + 1, 0); }
           else
             { ADD_NEW(state_offset, count); }
@@ -1289,7 +1289,7 @@ for (;;)
             active_count--;           /* Remove non-match possibility */
             next_active_state--;
             }
-          if (++count >= GET2(code, 1))
+          if (++count >= (int)GET2(code, 1))
             { ADD_NEW(state_offset + 2 + IMM2_SIZE, 0); }
           else
             { ADD_NEW(state_offset, count); }
@@ -1903,7 +1903,7 @@ for (;;)
             active_count--;           /* Remove non-match possibility */
             next_active_state--;
             }
-          if (++count >= GET2(code, 1))
+          if (++count >= (int)GET2(code, 1))
             { ADD_NEW(state_offset + 1 + IMM2_SIZE + 3, 0); }
           else
             { ADD_NEW(state_offset, count); }
@@ -1942,7 +1942,7 @@ for (;;)
           }
         if (nptr >= end_subject && (md->moptions & PCRE_PARTIAL_HARD) != 0)
             reset_could_continue = TRUE;
-        if (++count >= GET2(code, 1))
+        if (++count >= (int)GET2(code, 1))
           { ADD_NEW_DATA(-(state_offset + 2 + IMM2_SIZE), 0, ncount); }
         else
           { ADD_NEW_DATA(-state_offset, count, ncount); }
@@ -1984,7 +1984,7 @@ for (;;)
             active_count--;           /* Remove non-match possibility */
             next_active_state--;
             }
-          if (++count >= GET2(code, 1))
+          if (++count >= (int)GET2(code, 1))
             { ADD_NEW_DATA(-(state_offset + 2 + IMM2_SIZE), 0, ncount); }
           else
             { ADD_NEW_DATA(-state_offset, count, ncount); }
@@ -2024,7 +2024,7 @@ for (;;)
             active_count--;           /* Remove non-match possibility */
             next_active_state--;
             }
-          if (++count >= GET2(code, 1))
+          if (++count >= (int)GET2(code, 1))
             { ADD_NEW_DATA(-(state_offset + 2 + IMM2_SIZE), 0, 0); }
           else
             { ADD_NEW_DATA(-state_offset, count, 0); }
@@ -2061,7 +2061,7 @@ for (;;)
             active_count--;           /* Remove non-match possibility */
             next_active_state--;
             }
-          if (++count >= GET2(code, 1))
+          if (++count >= (int)GET2(code, 1))
             { ADD_NEW_DATA(-(state_offset + 2 + IMM2_SIZE), 0, 0); }
           else
             { ADD_NEW_DATA(-state_offset, count, 0); }
@@ -2431,7 +2431,7 @@ for (;;)
           }
         if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
           {
-          if (++count >= GET2(code, 1))
+          if (++count >= (int)GET2(code, 1))
             { ADD_NEW(state_offset + dlen + 1 + IMM2_SIZE, 0); }
           else
             { ADD_NEW(state_offset, count); }
@@ -2480,7 +2480,7 @@ for (;;)
             active_count--;             /* Remove non-match possibility */
             next_active_state--;
             }
-          if (++count >= GET2(code, 1))
+          if (++count >= (int)GET2(code, 1))
             { ADD_NEW(state_offset + dlen + 1 + IMM2_SIZE, 0); }
           else
             { ADD_NEW(state_offset, count); }
@@ -2553,11 +2553,11 @@ for (;;)
           case OP_CRRANGE:
           case OP_CRMINRANGE:
           count = current_state->count;  /* Already matched */
-          if (count >= GET2(ecode, 1))
+          if (count >= (int)GET2(ecode, 1))
             { ADD_ACTIVE(next_state_offset + 1 + 2 * IMM2_SIZE, 0); }
           if (isinclass)
             {
-            unsigned int max = GET2(ecode, 1 + IMM2_SIZE);
+            int max = (int)GET2(ecode, 1 + IMM2_SIZE);
             if (++count >= max && max != 0)   /* Max 0 => no limit */
               { ADD_NEW(next_state_offset + 1 + 2 * IMM2_SIZE, 0); }
             else
diff --git a/pcretest.c b/pcretest.c
index 25f3853..20dc0f1 100644
--- a/pcretest.c
+++ b/pcretest.c
@@ -5043,7 +5043,7 @@ while (!done)
           DFA_WS_DIMENSION);
         if (count == 0)
           {
-          fprintf(outfile, "Matched, but too many subsidiary matches\n");
+          fprintf(outfile, "Matched, but offsets vector is too small to show all matches\n");
           count = use_size_offsets/2;
           }
         }
diff --git a/testdata/testinput8 b/testdata/testinput8
index e235445..d91013b 100644
--- a/testdata/testinput8
+++ b/testdata/testinput8
@@ -4798,4 +4798,7 @@
     xxxxxxxxabcd
     xx\xa0xxxxxabcd 
 
+/abcd/
+    abcd\O0
+
 /-- End of testinput8 --/
diff --git a/testdata/testoutput10 b/testdata/testoutput10
index 9ee0f76..0e04205 100644
--- a/testdata/testoutput10
+++ b/testdata/testoutput10
@@ -813,7 +813,7 @@ No match
     11111111111111111111111111111111111111111111111111111111111111111111111
 No match
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  2: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
@@ -841,7 +841,7 @@ Matched, but too many subsidiary matches
     11111111111111111111111111111111111111111111111111111111111111111111111
 No match
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  2: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
@@ -869,7 +869,7 @@ Matched, but too many subsidiary matches
     11111111111111111111111111111111111111111111111111111111111111111111111
 No match
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  2: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
@@ -897,7 +897,7 @@ Matched, but too many subsidiary matches
     11111111111111111111111111111111111111111111111111111111111111111111111
 No match
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  2: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
@@ -925,7 +925,7 @@ Matched, but too many subsidiary matches
     11111111111111111111111111111111111111111111111111111111111111111111111
 No match
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  2: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
diff --git a/testdata/testoutput8 b/testdata/testoutput8
index 527ba4d..75affbe 100644
--- a/testdata/testoutput8
+++ b/testdata/testoutput8
@@ -49,7 +49,7 @@ No match
 16: a
 17: 
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  2: aaaaaaaaaaaaaaaaaaaaaaaaaaaa
@@ -3260,7 +3260,7 @@ No match
 
 /(.*)(\d*)/
     I have 2 numbers: 53147
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: I have 2 numbers: 53147
  1: I have 2 numbers: 5314
  2: I have 2 numbers: 531
@@ -3295,7 +3295,7 @@ Matched, but too many subsidiary matches
  
 /(.*?)(\d*)/
     I have 2 numbers: 53147
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: I have 2 numbers: 53147
  1: I have 2 numbers: 5314
  2: I have 2 numbers: 531
@@ -7848,7 +7848,7 @@ Error -26 (nested recursion at the same subject position)
 
 /(a+)/
     \O6aaaa
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: aaaa
  1: aaa
  2: aa
@@ -8016,4 +8016,8 @@ Error -30 (invalid data in workspace for DFA restart)
  0: xx\xa0xxxxxabcd
  1: xx\xa0xxxxxabc
 
+/abcd/
+    abcd\O0
+Matched, but offsets vector is too small to show all matches
+
 /-- End of testinput8 --/
diff --git a/testdata/testoutput9 b/testdata/testoutput9
index 95cd618..0bb101a 100644
--- a/testdata/testoutput9
+++ b/testdata/testoutput9
@@ -434,7 +434,7 @@ No match
 
 /\D*/8
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  2: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
@@ -460,7 +460,7 @@ Matched, but too many subsidiary matches
 
 /\D*/8
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-Matched, but too many subsidiary matches
+Matched, but offsets vector is too small to show all matches
  0: \x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}
  1: \x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}
  2: \x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}