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[Bug 849757] New: nfs-client: rpc.gssd segfaults when mounting with kerberos authentication enabled
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Sun, 10 Nov 2013 15:41:55 +0000
  • Message-id: <bug-849757-21960@http.bugzilla.novell.com/>

https://bugzilla.novell.com/show_bug.cgi?id=849757

https://bugzilla.novell.com/show_bug.cgi?id=849757#c0


Summary: nfs-client: rpc.gssd segfaults when mounting with
kerberos authentication enabled
Classification: openSUSE
Product: openSUSE 13.1
Version: Final
Platform: x86-64
OS/Version: Other
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Other
AssignedTo: bnc-team-screening@xxxxxxxxxxxxxxxxxxxxxx
ReportedBy: mike@xxxxxxxxxxx
QAContact: qa-bugs@xxxxxxx
Found By: ---
Blocker: ---


Created an attachment (id=566792)
--> (http://bugzilla.novell.com/attachment.cgi?id=566792)
Debug output of rpc.gssd with options "-v -v -v"

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:25.0) Gecko/20100101
Firefox/25.0

When mounting an NFSv4 export on a OS 13.1 client with kerberos authentication
enabled, the daemon rpc.gssd terminates with a segfault. In consequence, the
mount fails.

Reproducible: Always

Steps to Reproduce:
I used a OS 12.3+Tumbleweed NFS server.

Mount command:
mount -v -t nfs -o sec=krb5,nfsvers=4,nosuid,nodev,hard,intr
nfs-client.example.com:/exportdir /mountdir


Actual Results:
The machine credentials file (/tmp/krb5ccmachine_EXAMPLE.COM) is correctly
written, but the mount fails due to rpc.gssd crashing:

mount.nfs: timeout set for Sun Nov 10 16:22:24 2013
mount.nfs: trying text-based options
'sec=krb5,nfsvers=4,hard,intr,addr=fdc0::4:230:5ff:fe50:c0fc,clientaddr=fdc0::4:be05:43ff:fe07:a095'
mount.nfs: mount(2): Input/output error
mount.nfs: mount system call failed

Expected Results:
The NFS mount should succeed.

Trying to mount without kerberos authentication (i.e. using "sec=sys" instead
of "sec=krb5" doesn't help.

A same mount on an OS 12.3+Tumbleweed system using either "sec=sys" or
"sec=krb5" works correctly.

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