[Bug 510843] [NEW] NFS4/gssd mount fails: rpc.gssd crashes

[Jacek Konieczny]

Public bug reported:

[jajcus at lolek ~]$ mount /media/Muzyczka/
mount.nfs4: Broken pipe
[jajcus at lolek ~]$ mount /media/Muzyczka/
(hangs here, but Ctrl-C works, any other mount attempt will also hang)

in the dmesg:

[10602.771229] rpc.gssd[9934]: segfault at 8 ip b773f341 sp bfe152c0 error 4 in libkrb5.so.25.0.0[b7708000+61000]
[10619.362323] RPC: AUTH_GSS upcall timed out.
[10619.362327] Please check user daemon is running.
[10649.362316] RPC: AUTH_GSS upcall timed out.
[10649.362320] Please check user daemon is running.

After manually starting rpc.gssd the scenario repeats.

Stack dump from GDB:

Program received signal SIG37, Real-time event 37.
0xb7fe1430 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fe1430 in __kernel_vsyscall ()
#1  0xb7e6b851 in *__GI___poll (fds=0xb7eeaff4, nfds=256, timeout=500)
    at ../sysdeps/unix/sysv/linux/poll.c:83
#2  0x0804b13e in gssd_run () at gssd_main_loop.c:143
#3  0x0804af75 in main (argc=5, argv=0xbffff674) at gssd.c:191

** Affects: pld-linux
     Importance: Undecided
         Status: New

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NFS4/gssd mount fails: rpc.gssd crashes
https://bugs.launchpad.net/bugs/510843
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Linux.

Status in PLD Linux Distribution: New

Bug description:
[jajcus at lolek ~]$ mount /media/Muzyczka/
mount.nfs4: Broken pipe
[jajcus at lolek ~]$ mount /media/Muzyczka/
(hangs here, but Ctrl-C works, any other mount attempt will also hang)

in the dmesg:

[10602.771229] rpc.gssd[9934]: segfault at 8 ip b773f341 sp bfe152c0 error 4 in libkrb5.so.25.0.0[b7708000+61000]
[10619.362323] RPC: AUTH_GSS upcall timed out.
[10619.362327] Please check user daemon is running.
[10649.362316] RPC: AUTH_GSS upcall timed out.
[10649.362320] Please check user daemon is running.

After manually starting rpc.gssd the scenario repeats.

Stack dump from GDB:

Program received signal SIG37, Real-time event 37.
0xb7fe1430 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fe1430 in __kernel_vsyscall ()
#1  0xb7e6b851 in *__GI___poll (fds=0xb7eeaff4, nfds=256, timeout=500)
    at ../sysdeps/unix/sysv/linux/poll.c:83
#2  0x0804b13e in gssd_run () at gssd_main_loop.c:143
#3  0x0804af75 in main (argc=5, argv=0xbffff674) at gssd.c:191