NFSD: Fix memory leak in encoding denied lock

Commit 8c7424cff6 (nfsd4: don't try to encode conflicting owner if low on space)
forgot free conf->data in nfsd4_encode_lockt and before sign conf->data to NULL
in nfsd4_encode_lock_denied.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 21ffb9b9b76897bf8da48dc4aeccd800193bf9e7..1ad7bd4e346fc9d920663d7de572f7f5f8fb059b 100644 (file)
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2874,6 +2874,7 @@ again:
                 * return the conflicting open:
                 */
                if (conf->len) {
+                       kfree(conf->data);
                        conf->len = 0;
                        conf->data = NULL;
                        goto again;
@@ -2886,6 +2887,7 @@ again:
        if (conf->len) {
                p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
                p = xdr_encode_opaque(p, conf->data, conf->len);
+               kfree(conf->data);
        }  else {  /* non - nfsv4 lock in conflict, no clientid nor owner */
                p = xdr_encode_hyper(p, (u64)0); /* clientid */
                *p++ = cpu_to_be32(0); /* length of owner name */
@@ -2902,7 +2904,7 @@ nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lo
                nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
        else if (nfserr == nfserr_denied)
                nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
-       kfree(lock->lk_denied.ld_owner.data);
+
        return nfserr;
 }