On 03/21/2011 01:36 AM, Vladimir Elisseev wrote:
> Steve,
>
> The segfault on the client side is gone after client reboot. This
> segfault occurs when nfs-utils has been updated and then I just restart
> corresponding services (rpcbind, rpc.idmapd, rpc.gssd) without rebooting
> the client. Now client simply exits with the lines below (as I described
> initially in my first mail):
> mount.nfs: mount(2): Permission denied
> mount.nfs: access denied by server while mounting ...
Ok.. to find out where rpc.gssd is segfaulting do the following:
# debuginfo-install nfs-utils
(assuming Fedora)
# gdb /usr/sbin/rpc.gssd
gdb> run -f -vvv
(When the segfault happens)
gdb> bt
(which will show the backtrace)
steved.
>
> Regards,
> Vladimir.
>
> On Sat, 2011-03-19 at 22:19 -0400, Steve Dickson wrote:
>>
>> On 03/19/2011 03:56 AM, Vladimir Elisseev wrote:
>>> Kevin,
>>>
>>> I have some updates. I recompiled nfs-utils and dependencies (libgssglue
>>> keyutils librpcsecgss libtirpc) on the server and on the test client.
>>> Nevertheless, while on the server side I see the same error:
>>> rpc.svcgssd[8390]: qword_eol: fflush failed: errno 22 (Invalid argument)
>>> on the client side rpc.gssd segfault(!):
>>> kernel: rpc.gssd[2107] segfault at 4 ip 0000003ef9430805 sp 00007fff655cdd10 error 4 in libgssapi_krb5.so.2.2[3ef9400000+3e000]
>>> Reverting back to nfs-utils 1.2.2 on the client and everything is fine.
>>> Below are relevant log entries from KDC when using nfs-utils 1.2.2 and 1.2.3 on the client:
>>>
>>> ****** nfs-utils 1.2.2 *******
>>> Mar 19 07:56:27 srv2 krb5kdc[7945]: AS_REQ (7 etypes {18 17 16 23 1 3 2}) 192.168.1.8: ISSUE: authtime 1300517787, etypes {rep=18 tkt=18 ses=18}, host/vbox.xxx.xxx@xxx for krbtgt/X.X@xxx
>>> Mar 19 07:56:28 srv2 krb5kdc[7945]: TGS_REQ (7 etypes {18 17 16 23 1 3 2}) 192.168.1.8: ISSUE: authtime 1300517787, etypes {rep=18 tkt=18 ses=18}, host/vbox.xxx.xxx@xxx for nfs/nfs.xxx.xxx@xxx
>>> Mar 19 07:56:28 srv2 krb5kdc[7945]: TGS_REQ (3 etypes {1 3 2}) 192.168.1.8: ISSUE: authtime 1300517787, etypes {rep=18 tkt=18 ses=1}, host/vbox.xxx.xxx@xxx for nfs/nfs.xxx.xxx@xxx
>>>
>>> ****** nfs-utils 1.2.3 *******
>>> Mar 19 08:22:22 srv2 krb5kdc[7945]: AS_REQ (7 etypes {18 17 16 23 1 3 2}) 192.168.1.2: ISSUE: authtime 1300519342, etypes {rep=18 tkt=18 ses=18}, host/x.x.x@xxx for krbtgt/X.X@xxx
>>> Mar 19 08:22:22 srv2 krb5kdc[7945]: TGS_REQ (7 etypes {18 17 16 23 1 3 2}) 192.168.1.2: ISSUE: authtime 1300519342, etypes {rep=18 tkt=18 ses=18}, host/x.x.x@xxx for nfs/nfs.x.x@xxx
>>> then
>>> rpc.svcgssd[8390]: qword_eol: fflush failed: errno 22 (Invalid argument)
>>> and segfault on the client side.
>> Would it be possible to get a back trace from the core?
>>
>> steved.
>
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