[Dnsmasq-discuss] [PATCH] Update DNS records after pruning DHCP leases

[Erik Karlsson]

From: Erik Karlsson <erik.karlsson at iopsys.eu>

Not doing so can result in a use after free since the name for DHCP
derived DNS records is represented as a pointer into the DHCP lease
table. Update will only happen when necessary since lease_update_dns
tests internally on dns_dirty and the force argument is zero.

Signed-off-by: Erik Karlsson <erik.karlsson at iopsys.eu>
---
 src/dnsmasq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/dnsmasq.c b/src/dnsmasq.c
index a9f26ae..1be3b82 100644
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -1518,6 +1518,7 @@ static void async_event(int pipe, time_t now)
 	  {
 	    lease_prune(NULL, now);
 	    lease_update_file(now);
+	    lease_update_dns(0);
 	  }
 #ifdef HAVE_DHCP6
 	else if (daemon->doing_ra)
-- 
2.43.2