util.c: add len sanity checks to dumpstr

Reported by clang. * util.c (dumpstr): Check that len is sane.
2018-05-02 20:57:58 +02:00 · 2018-05-02 20:57:58 +02:00 · 973687fd92
commit 973687fd92
parent ee023f97ab
1 changed files with 3 additions and 0 deletions
--- a/util.c
+++ b/util.c
@ -928,6 +928,9 @@ dumpstr(struct tcb *const tcp, const kernel_ulong_t addr, const int len)
 	const unsigned char *src;
 	int i;

+	if ((len < 0) || (len > INT_MAX - 16))
+		return;
+
 	memset(outbuf, ' ', sizeof(outbuf));

 	if (strsize < len + 16) {