Reduce max size of compiled pattern for using JIT in fuzzing in the l…

…ight of further issues
PCRE2Project · Mar 27, 2024 · 594abb8 · 594abb8
1 parent 29764f9
commit 594abb8
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/pcre2_fuzzsupport.c b/src/pcre2_fuzzsupport.c
@@ -23,6 +23,7 @@ Further updates March 2024 by PH
 #include <sys/resource.h>
 
 #define STACK_SIZE_MB 256
+#define JIT_SIZE_LIMIT (500 * 1024)
 
 #ifndef PCRE2_CODE_UNIT_WIDTH
 #define PCRE2_CODE_UNIT_WIDTH 8
@@ -439,7 +440,7 @@ for (int i = 0; i < 2; i++)
 
 #ifdef SUPPORT_JIT
     int jit_ret = -1;
-    if (((struct pcre2_real_code *)code)->blocksize <= 1024 * 1024)
+    if (((struct pcre2_real_code *)code)->blocksize <= JIT_SIZE_LIMIT)
       {
 #ifdef STANDALONE
       printf("Calling JIT compile\n");
@@ -452,8 +453,9 @@ for (int i = 0; i < 2; i++)
     else
       {
 #ifdef STANDALONE
-      printf("Not calling JIT: compiled pattern is too long (%ld bytes)\n",
-        ((struct pcre2_real_code *)code)->blocksize);
+      printf("Not calling JIT: compiled pattern is too long "
+        "(%ld bytes; limit=%d)\n",
+        ((struct pcre2_real_code *)code)->blocksize, JIT_SIZE_LIMIT);
 #endif
       }
 #endif  /* SUPPORT_JIT */