diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/network/dns_parse.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/network/dns_parse.c b/src/network/dns_parse.c index e6ee19d9..320df60d 100644 --- a/src/network/dns_parse.c +++ b/src/network/dns_parse.c @@ -15,17 +15,17 @@ int __dns_parse(const unsigned char *r, int rlen, int (*callback)(void *, int, c if (qdcount+ancount > 64) return -1; while (qdcount--) { while (p-r < rlen && *p-1U < 127) p++; - if (*p>193 || (*p==193 && p[1]>254) || p>r+rlen-6) + if (p>r+rlen-6 || *p>193 || (*p==193 && p[1]>254)) return -1; p += 5 + !!*p; } while (ancount--) { while (p-r < rlen && *p-1U < 127) p++; - if (*p>193 || (*p==193 && p[1]>254) || p>r+rlen-6) + if (p>r+rlen-12 || *p>193 || (*p==193 && p[1]>254)) return -1; p += 1 + !!*p; len = p[8]*256 + p[9]; - if (p+len > r+rlen) return -1; + if (len+10 > r+rlen-p) return -1; if (callback(ctx, p[1], p+10, len, r) < 0) return -1; p += 10 + len; } |