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path: root/fs/nfsd/nfsxdr.c
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Diffstat (limited to 'fs/nfsd/nfsxdr.c')
-rw-r--r--fs/nfsd/nfsxdr.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index 986f9b32083c..b86e3658a0af 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -313,8 +313,11 @@ nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
* Round the length of the data which was specified up to
* the next multiple of XDR units and then compare that
* against the length which was actually received.
+ * Note that when RPCSEC/GSS (for example) is used, the
+ * data buffer can be padded so dlen might be larger
+ * than required. It must never be smaller.
*/
- if (dlen != XDR_QUADLEN(len)*4)
+ if (dlen < XDR_QUADLEN(len)*4)
return 0;
rqstp->rq_vec[0].iov_base = (void*)p;