| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.19 163/177] nfsd4: disallow SEEK with special stateids | Date | Sat, 2 May 2015 21:03:05 +0200 |
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3.19-stable review patch. If anyone has any objections, please let me know.
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From: "J. Bruce Fields" <bfields@redhat.com>
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>
--- fs/nfsd/nfs4proc.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1069,6 +1069,8 @@ nfsd4_seek(struct svc_rqst *rqstp, struc 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:
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