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nfsd: put the export reference in nfsd4_verify_deleg_dentry

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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: 876c553cb4 ("NFSD: verify the opened dentry after setting a delegation")
Reported-by: Yongcheng Yang <yoyang@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Jeff Layton 2022-11-08 11:23:11 -05:00 committed by Chuck Lever
parent bdd6b5624c
commit 50256e4793
1 changed files with 1 additions and 0 deletions
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fs/nfsd/nfs4state.c
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@ -5382,6 +5382,7 @@ 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;