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 22:04:05 +0200 |
| commit | 6fd154a83b18bc81aa3f1071e74c36d9076ff4b9 (patch) | |
| tree | 9b2697790255ac8d19f8f0988fc0f9d123de55ff /fs | |
| parent | e2efc21fbad9a8d055586716fad4d4baaf210b56 (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 591296722117..5416968b3fb3 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -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: |