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check error returned by dns_decode

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before this commit, sending "GET / HTTP/1.1" to server will cause uninitialized variable access.
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chengzhicn 2017-10-13 03:08:12 +08:00 committed by GitHub
parent 006ffa619e
commit 122ac1a25d
1 changed files with 1 additions and 1 deletions
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src/iodined.c
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@ -2068,7 +2068,7 @@ read_dns(int fd, struct dnsfd *dns_fds, int tun_fd, struct query *q)
if (raw_decode(packet, r, q, fd, dns_fds, tun_fd)) { if (raw_decode(packet, r, q, fd, dns_fds, tun_fd)) {
return 0; return 0;
} }
if (dns_decode(NULL, 0, q, QR_QUERY, packet, r) < 0) { if (dns_decode(NULL, 0, q, QR_QUERY, packet, r) <= 0) {
return 0; return 0;
} }