Prevent out of bounds (2)

2019-12-19 12:46:38 +01:00 · 2019-12-19 12:46:38 +01:00 · 5978352b2d
parent 2b7c929a5a
commit 5978352b2d
1 changed files with 3 additions and 0 deletions
--- a/app/src/main/jni/netguard/dns.c
+++ b/app/src/main/jni/netguard/dns.c
@ -22,6 +22,9 @@
 int32_t get_qname(const uint8_t *data, const size_t datalen, uint16_t off, char *qname) {
    *qname = 0;

+    if (off >= datalen)
+        return -1;
+
    uint16_t c = 0;
    uint8_t noff = 0;
    uint16_t ptr = off;