nfsd4: disallow SEEK with special stateids
authorJ. Bruce Fields <bfields@redhat.com>
Tue, 21 Apr 2015 19:25:39 +0000 (15:25 -0400)
committerJ. Bruce Fields <bfields@redhat.com>
Tue, 21 Apr 2015 20:16:01 +0000 (16:16 -0400)
commit980608fb50aea34993ba956b71cd4602aa42b14b
treea6105aecef17dd3bc25bb1754acb87bbf0639255
parent5ba4a25ab7b13be528b23f85182f4d09cf7f71ad
nfsd4: disallow SEEK with special stateids

If the client uses a special stateid then we'll pass a NULL file to
vfs_llseek.

Fixes: 24bab491220f " NFSD: Implement SEEK"
Cc: Anna Schumaker <Anna.Schumaker@Netapp.com>
Cc: stable@vger.kernel.org
Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
fs/nfsd/nfs4proc.c