[PATCH 5.10 677/770] nfsd: put the export reference in nfsd4_verify_deleg_dentry

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5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jeff Layton <jlayton@xxxxxxxxxx>

[ Upstream commit 50256e4793a5e5ab77703c82a47344ad2e774a59 ]

nfsd_lookup_dentry returns an export reference in addition to the dentry
ref. Ensure that we put it too.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=2138866
Fixes: 876c553cb410 ("NFSD: verify the opened dentry after setting a delegation")
Reported-by: Yongcheng Yang <yoyang@xxxxxxxxxx>
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 fs/nfsd/nfs4state.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 948ef17178158..10915c72c7815 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5397,6 +5397,7 @@ nfsd4_verify_deleg_dentry(struct nfsd4_open *open, struct nfs4_file *fp,
 	if (err)
 		return -EAGAIN;
 
+	exp_put(exp);
 	dput(child);
 	if (child != file_dentry(fp->fi_deleg_file->nf_file))
 		return -EAGAIN;
-- 
2.43.0







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