Commit 61c8c52c authored by J. Bruce Fields's avatar J. Bruce Fields Committed by Sasha Levin

nfsd4: disallow SEEK with special stateids

[ Upstream commit 980608fb ]

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: default avatarChristoph Hellwig <hch@infradead.org>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent 5a9fb83e
......@@ -1028,6 +1028,8 @@ 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:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment