Arch Linux

Description:
When trying to mount a kerberized NFSv4 share, id.gssd segfaults:

[root@nfs4client ~]# mount -vvv -t nfs4 -o sec=krb5 server.nfs4.test:/ /mnt
mount: fstab path: "/etc/fstab"
mount: mtab path: "/etc/mtab"
mount: lock path: "/etc/mtab~"
mount: temp path: "/etc/mtab.tmp"
mount: UID: 0
mount: eUID: 0
mount: spec: "server.nfs4.test:/"
mount: node: "/mnt"
mount: types: "nfs4"
mount: opts: "sec=krb5"
mount: external mount: argv[0] = "/sbin/mount.nfs4"
mount: external mount: argv[1] = "server.nfs4.test:/"
mount: external mount: argv[2] = "/mnt"
mount: external mount: argv[3] = "-v"
mount: external mount: argv[4] = "-o"
mount: external mount: argv[5] = "rw,sec=krb5"
mount.nfs4: timeout set for Mon Jul 5 21:31:42 2010
mount.nfs4: trying text-based options 'sec=krb5,addr=10.153.59.63,clientaddr=10.153.59.64'


Starting program: /usr/sbin/rpc.gssd -fnrrrvvv
[Thread debugging using libthread_db enabled]
Warning: rpcsec_gss library does not support setting debug level
beginning poll
handling gssd upcall (/var/lib/nfs/rpc_pipefs/nfs/clnt32)
handle_gssd_upcall: 'mech=krb5 uid=0 '
handling krb5 upcall (/var/lib/nfs/rpc_pipefs/nfs/clnt32)
process_krb5_upcall: service is '<null>'
getting credentials for client with uid 0 for server server.nfs4.test
CC file '/tmp/krb5cc_machine_NFS4.TEST' being considered, with preferred realm 'NFS4.TEST'
CC file '/tmp/krb5cc_machine_NFS4.TEST'(nfs/client.nfs4.test@NFS4.TEST) passed all checks and has mtime of 1278358099
CC file '/tmp/krb5cc_0' being considered, with preferred realm 'NFS4.TEST'
CC file '/tmp/krb5cc_0'(nfs/client.nfs4.test@NFS4.TEST) passed all checks and has mtime of 1278357206
CC file '/tmp/krb5cc_machine_NFS4.TEST' is our current best match with mtime of 1278358099
using FILE:/tmp/krb5cc_machine_NFS4.TEST as credentials cache for client with uid 0 for server server.nfs4.test
using gss_krb5_ccache_name to select krb5 ccache FILE:/tmp/krb5cc_machine_NFS4.TEST
creating context using fsuid 0 (save_uid 0)
creating tcp client for server server.nfs4.test
DEBUG: port already set to 2049
creating context with server nfs@server.nfs4.test

Program received signal SIGSEGV, Segmentation fault.
0xb7a59c8e in __gss_get_mechanism_cred () from /usr/lib/libgssglue.so.1
(gdb) bt
#0 0xb7a59c8e in __gss_get_mechanism_cred () from /usr/lib/libgssglue.so.1
#1 0xb7a5ac2c in gss_init_sec_context () from /usr/lib/libgssglue.so.1
#2 0xb7f0e215 in authgss_refresh () from /usr/lib/libtirpc.so.1
#3 0xb7f0e67d in authgss_create () from /usr/lib/libtirpc.so.1
#4 0xb7f0e779 in authgss_create_default () from /usr/lib/libtirpc.so.1
#5 0x0804cbdc in ?? ()
#6 0x0804d0b5 in ?? ()
#7 0x0804d7c8 in ?? ()
#8 0x0804b7a8 in ?? ()
#9 0x0804b309 in ?? ()
#10 0xb7dbec76 in __libc_start_main () from /lib/libc.so.6
#11 0x0804a621 in ?? ()

Additional info:
* nfs-utils 1.2.2-3, heimdal 1.3.3-1
* Plain kinit works, I also see the mount AS-REQ, so this seems to be NFS-specific.
* Possibly related to http://bugs.gentoo.org/293593