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ovl: fix nlink leak in ovl_rename()

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This patch fixes an overlay inode nlink leak in the case where
ovl_rename() renames over a non-dir.

This is not so critical, because overlay inode doesn't rely on
nlink dropping to zero for inode deletion.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Amir Goldstein 2017-06-05 22:44:49 +03:00 committed by Miklos Szeredi
parent 7f53b7d047
commit f681eb1d5c
1 changed files with 7 additions and 0 deletions
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7
fs/overlayfs/dir.c
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@ -1046,6 +1046,13 @@ static int ovl_rename(struct inode *olddir, struct dentry *old,
if (cleanup_whiteout)
ovl_cleanup(old_upperdir->d_inode, newdentry);
if (overwrite && d_inode(new)) {
if (new_is_dir)
clear_nlink(d_inode(new));
else
drop_nlink(d_inode(new));
}
ovl_dentry_version_inc(old->d_parent);
ovl_dentry_version_inc(new->d_parent);