[PATCH 1/4] NFSD: Fix memory leak in encoding denied lock

[Kinglong Mee <kinglongmee@gmail.com>]

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>
---
 fs/nfsd/nfs4xdr.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 5a1d088..007e322 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2884,6 +2884,7 @@ again:
 		 * return the conflicting open:
 		 */
 		if (conf->len) {
+			kfree(conf->data);
 			conf->len = 0;
 			conf->data = NULL;
 			goto again;
@@ -2896,6 +2897,7 @@ 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 */
@@ -2912,7 +2914,7 @@ 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;
 }
 
-- 
1.9.3