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resolved: fix abort when recv() returns 0 

https://bugzilla.redhat.com/show_bug.cgi?id=1703598
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2019-09-12 14:52:08 +02:00 committed by Yu Watanabe
parent 5dcd46dd53
commit f731fd5be6
1 changed files with 5 additions and 2 deletions
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7
src/resolve/resolved-dns-transaction.c
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@ -1183,8 +1183,8 @@ static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *use
if (ERRNO_IS_DISCONNECT(-r)) {
usec_t usec;
/* UDP connection failure get reported via ICMP and then are possible delivered to us on the next
* recvmsg(). Treat this like a lost packet. */
/* UDP connection failures get reported via ICMP and then are possibly delivered to us on the
* next recvmsg(). Treat this like a lost packet. */
log_debug_errno(r, "Connection failure for DNS UDP packet: %m");
assert_se(sd_event_now(t->scope->manager->event, clock_boottime_or_monotonic(), &usec) >= 0);
@ -1198,6 +1198,9 @@ static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *use
t->answer_errno = -r;
return 0;
}
if (r == 0)
/* Spurious wakeup without any data */
return 0;
r = dns_packet_validate_reply(p);
if (r < 0) {