7:11 a.m.
On 08/06/2018 09:30 AM, Rolf Anders wrote:
Hi,
I'm using nfs-ganesha 2.6.2 on Ubuntu 16.04. When a client mounts
with "-t nfs4 -o sec=krb5,vers=4.0" ganesha.nfsd crashes in
nfs_rpc_create_chan_v40():
Thread 11 "ganesha.nfsd" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff269c700 (LWP 1118)]
nfs_rpc_create_chan_v40 (clientid=0x7fffec0097b0, flags=<optimized out>)
at /root/src/nfs-ganesha-2.6.2/src/MainNFSD/nfs_rpc_callback.c:591
591 if (AUTH_FAILURE(chan->auth)) {
(gdb)
(gdb) print chan->auth
$1 = (AUTH *) 0x0
The cause seems to be the following: nfs_rpc_create_chan_v40()
calls nfs_rpc_callback_setup_gss(), which calls
gssd_refresh_krb5_machine_credential(). For some reason which I don't
yet understand gssd_refresh_krb5_machine_credential() fails in my setup,
and that makes nfs_rpc_callback_setup_gss() to return without setting
chan->auth.
What would be a proper fix for this problem?
Rolf
Hi, Rolf.
Looks like a bug. I have a potential fix, can you try it? You will
need to apply auth-dummy-ganesha.patch to Ganesha, and
auth-dummy-ntirpc.patch to ntirpc. You will likely have to re-run cmake
to get ntirpc to regenerate it's exports.
Thanks,
Daniel