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Fix crash in PXE/netboot when DNS server disabled.

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This commit is contained in:
Simon Kelley
2021-10-19 15:33:41 +01:00
parent 37a70d39e0
commit 9560658c5b
3 changed files with 12 additions and 5 deletions
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4
CHANGELOG
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@@ -11,6 +11,10 @@ version 2.87
Add --filter-A and --filter-AAAA options, to remove IPv4 or IPv6
addresses from DNS answers.
Fix crash doing netbooting when --port is set to zero
to disable the DNS server. Thanks to Drexl Johannes
for the bug report.
version 2.86
Handle DHCPREBIND requests in the DHCPv6 server code.

1
debian/changelog vendored
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@@ -2,6 +2,7 @@ dnsmasq (2.87-1) unstable; urgency=low
* New upstream.
* Include new NFTset support in the build.
* Fix crash on netboot with DNS server disabled. (closes: #996332)
-- Simon Kelley <simon@thekelleys.org.uk> Wed, 08 Sep 2021 23:11:25 +0000

2
src/cache.c
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@@ -1399,6 +1399,8 @@ struct in_addr a_record_from_hosts(char *name, time_t now)
struct crec *crecp = NULL;
struct in_addr ret;
/* If no DNS service, cache not initialised. */
if (daemon->port != 0)
while ((crecp = cache_find_by_name(crecp, name, now, F_IPV4)))
if (crecp->flags & F_HOSTS)
return crecp->addr.addr4;