Commit 980608fb authored Apr 21, 2015 by J. Bruce Fields

nfsd4: disallow SEEK with special stateids



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

Fixes: 24bab491 " 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>

parent 5ba4a25a

fs/nfsd/nfs4proc.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1071,6 +1071,8 @@ nfsd4_seek(struct svc_rqst rqstp, struct nfsd4_compound_state cstate,
		dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
		return status;
		}
		if (!file)
		return nfserr_bad_stateid;

		switch (seek->seek_whence) {
		case NFS4_CONTENT_DATA: