Bug 158432 - [panic] gssd(8) generate much network traffic and led to kernel panic
Summary: [panic] gssd(8) generate much network traffic and led to kernel panic
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 8.2-STABLE
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords: crash
Depends on:
Blocks:
 
Reported: 2011-06-29 15:50 UTC by Martin Laabs
Modified: 2022-10-17 12:17 UTC (History)
0 users

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Description Martin Laabs 2011-06-29 15:50:08 UTC
The /home directory is mounted via nfs (krbos-secured), IPv6 from the server. Sometimes, and repeatable after starting openoffice gssd produces much network traffic and i am unable to do a "ls" in my home directory. However all file operation and also a "ls" in subdirectories work.
In this state gssd took also lot of CPU power. When stopping or restarting gssd the kernel panics. 

The following nfs related is enabled in my rc.conf file (client side)

nfsuserd_enable="YES"
nfscbd_enable="YES"
nfs_client_enable="YES"
gssd_enable="YES"
rpc_lockd_enable="YES"
rpc_statd_enable="YES"
rpcbind_enable="yes"             # Run the portmapper service (YES/NO).
rpcbind_flags="-i"                # Flags to rpcbind (if enabled).

How-To-Repeat: Set up a IPv6 network with kerberos authentification. Enable the NFS server option on this server, put the following line into the /etc/exports

/usr/home  -sec=krb5p <host list>

Mount the directory on a client machine o /home i.e. by putting 

server:/usr/home        /home        nfs   rw       0       0

in your /etc/fstab file and mount /home.

Now start openoffice 3.3.0 and watch the network traffic. When it runs to maximum of you network short after stop the gssd daemon.
Comment 1 Martin Laabs 2011-07-01 20:38:34 UTC
Hello,

while in the state gssd generate much network traffic the following 
messages are written into the /var/heimdal/kdc.log about 150 times a second:

2011-07-01T18:59:23 Failed parsing TGS-REQ from IPv6:2001:xxx:xxx::2
2011-07-01T18:59:23 Failed to verify AP-REQ: Ticket expired

Best Regards,
  Martin L.
Comment 2 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 07:59:20 UTC
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

Mail being skipped
Comment 3 Graham Perrin freebsd_committer freebsd_triage 2022-10-17 12:17:08 UTC
Keyword: 

    crash

– in lieu of summary line prefix: 

    [panic]

* bulk change for the keyword
* summary lines may be edited manually (not in bulk). 

Keyword descriptions and search interface: 

    <https://bugs.freebsd.org/bugzilla/describekeywords.cgi>