diff options
| author | J. Bruce Fields <bfields@redhat.com> | 2015-04-21 15:25:39 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-06 22:02:03 +0200 |
| commit | b3d6135d6b83abca927ded331d252a2d59c25901 (patch) | |
| tree | cc1e7664bb093c0539ab7a49ea341f5eb8f87473 /fs | |
| parent | 8e418cbd93be5f7da1a1dd54e110935314ef747b (diff) | |
nfsd4: disallow SEEK with special stateids
commit 980608fb50aea34993ba956b71cd4602aa42b14b upstream.
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>
Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index a1370084f41c..2cd2d64ff1e8 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1069,6 +1069,8 @@ 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: |