| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.14 123/130] NFSv4: Fix a dentry leak on alias use | Date | Tue, 01 Mar 2016 23:53:39 +0000 |
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3.14-stable review patch. If anyone has any objections, please let me know.
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From: Benjamin Coddington <bcodding@redhat.com>
commit d9dfd8d741683347ee159d25f5b50c346a0df557 upstream.
In the case where d_add_unique() finds an appropriate alias to use it will have already incremented the reference count. An additional dget() to swap the open context's dentry is unnecessary and will leak a reference.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Fixes: 275bb307865a3 ("NFSv4: Move dentry instantiation into the NFSv4-...") Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/nfs/nfs4proc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2187,9 +2187,9 @@ static int _nfs4_open_and_get_state(stru dentry = d_add_unique(dentry, igrab(state->inode)); if (dentry == NULL) { dentry = opendata->dentry; - } else if (dentry != ctx->dentry) { + } else { dput(ctx->dentry); - ctx->dentry = dget(dentry); + ctx->dentry = dentry; } nfs_set_verifier(dentry, nfs_save_change_attribute(opendata->dir->d_inode));
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