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From: Rick Macklem <rmacklem@FreeBSD.org>
Date: Wed, 1 Jul 2009 16:42:03 +0000 (UTC)
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Subject: cvs commit: src/sys/rpc/rpcsec_gss rpcsec_gss.c
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rmacklem    2009-07-01 16:42:03 UTC

  FreeBSD src repository

  Modified files:
    sys/rpc/rpcsec_gss   rpcsec_gss.c 
  Log:
  SVN rev 195246 on 2009-07-01 16:42:03Z by rmacklem
  
  When unmounting an NFS mount using sec=krb5[ip], the umount system
  call could get hung sleeping on "gsssta" if the credentials for a user
  that had been accessing the mount point have expired. This happened
  because rpc_gss_destroy_context() would end up calling itself when the
  "destroy context" RPC was attempted, trying to refresh the credentials.
  This patch just checks for this case in rpc_gss_refresh() and returns
  without attempting the refresh, which avoids the recursive call to
  rpc_gss_destroy_context() and the subsequent hang.
  
  Reviewed by:    dfr
  Approved by:    re (Ken Smith), kib (mentor)
  
  Revision  Changes    Path
  1.3       +14 -0     src/sys/rpc/rpcsec_gss/rpcsec_gss.c