Public bug reported: Description: Ubuntu 16.04.2 LTS Release: 16.04
Package: nfs-common 1:1.2.8-9ubuntu12.1.0 This bug affects all active and proposed versions of nfs-common used by ubuntu (as every version is based on nfs-utils_1.2.8) from trusty to artful. There is a small error in the code for rpc.gssd that causes it to always perform reverse DNS when looking up the server name to pass to GSSAPI. This causes a problem for NFS4 in environments where reverse DNS is correctly configured. This has been confirmed in Debian and a more recent version of nfs-utils that appears to have fixed this has been pushed to sid: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=803710 However, I do not know if that version of nfs-utils will make it to ubuntu soon. Will it? If not, the patch to this appears to be rather straightforward. The error is an '== 1' instead of an '== 0' in two lines of gssd_proc.c that are evaluated when the -D flag to rpc.gssd is not passed (and thus avoid_dns is true) --- utils/gssd/gssd_proc.c 2017-06-11 15:47:35.000000000 -0700 +++ utils/gssd/gssd_proc_patch.c 2017-06-11 15:48:36.152115792 -0700 @@ -181,17 +181,17 @@ if (avoid_dns) { /* * Determine if this is a server name, or an IP address. * If it is an IP address, do the DNS lookup otherwise * skip the DNS lookup. */ servername = 0; - if (strchr(name, '.') && inet_pton(AF_INET, name, buf) == 1) + if (strchr(name, '.') && inet_pton(AF_INET, name, buf) == 0) servername = 1; /* IPv4 */ - else if (strchr(name, ':') && inet_pton(AF_INET6, name, buf) == 1) + else if (strchr(name, ':') && inet_pton(AF_INET6, name, buf) == 0) servername = 1; /* or IPv6 */ if (servername) { return strdup(name); } } Is there any way to get either 1) the updated version of nfs-utils or 2) this patch applied to xenial (and, hopefully, other versions of ubuntu)? Thank you for looking at this! ** Affects: nfs-utils (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1697339 Title: rpc.gssd performs reverse DNS by default (regardless of -D flag) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/1697339/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
