lib: onigmo: fix OSS-FUZZ 46086

sashashura · edsiper · commit e8dc2ba90745 · 2022-09-11T10:12:28.000-06:00
Temporary fix until k-takata/Onigmo#165 is merged Signed-off-by: sashashura <93376818+sashashura@users.noreply.github.com>
diff --git a/regcomp.c b/regcomp.c
@@ -535,6 +535,9 @@ compile_string_node(Node* node, regex_t* reg)
     }
     else {
       r = add_compile_string(prev, prev_len, blen, reg, ambig);
+      if (p + len > end) {
+        return 0;
+      }
       if (r) return r;
 
       prev  = p;

Original file line number	Diff line number	Diff line change
`@@ -535,6 +535,9 @@ compile_string_node(Node* node, regex_t* reg)`
`535`	`535`	`}`
`536`	`536`	`else {`
`537`	`537`	`r = add_compile_string(prev, prev_len, blen, reg, ambig);`
	`538`	`+ if (p + len > end) {`
	`539`	`+ return 0;`
	`540`	`+ }`
`538`	`541`	`if (r) return r;`
`539`	`542`
`540`	`543`	`prev = p;`