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timesyncd: consider too long packets as invalid

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If the received NTP message from server didn't fit to our buffer, either
it is doing something nasty or we don't know the protocol. Consider the
packet as invalid.

(David: add parantheses around conditional)
This commit is contained in:
Topi Miettinen 2015-01-18 16:01:25 +02:00 committed by David Herrmann
parent 50efadb0ae
commit 43fcd650e5
1 changed files with 2 additions and 1 deletions
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3
src/timesync/timesyncd-manager.c
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@ -525,7 +525,8 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re
return manager_connect(m);
}
if (iov.iov_len < sizeof(struct ntp_msg)) {
/* Too short or too long packet? */
if (iov.iov_len < sizeof(struct ntp_msg) || (msghdr.msg_flags & MSG_TRUNC)) {
log_warning("Invalid response from server. Disconnecting.");
return manager_connect(m);
}