[PATCH 1/1] NFSv4.2: fix copy stateid copying for the async copy

[Olga Kornievskaia <olga.kornievskaia@xxxxxxxxx>]

From: Olga Kornievskaia <kolga@xxxxxxxxxx>

This patch fixes Dan Carpenter's report that the static checker
found a problem where memcpy() was copying into too small of a buffer.

Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Fixes: e0639dc5805a: "NFSD introduce async copy feature"
Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx>
---
 fs/nfsd/nfs4proc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index dd9f38d072dd..e13c4c81fb89 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1538,8 +1538,8 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		if (!nfs4_init_copy_state(nn, copy))
 			goto out_err;
 		refcount_set(&async_copy->refcount, 1);
-		memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid,
-			sizeof(copy->cp_stateid));
+		memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid.stid,
+			sizeof(copy->cp_res.cb_stateid));
 		dup_copy_fields(copy, async_copy);
 		async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
 				async_copy, "%s", "copy thread");
-- 
2.18.2