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    Subject[PATCH 4/4] Unionfs: ensure we have lower dentries in d_iput
    Date
    Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
    ---
    fs/unionfs/dentry.c | 3 ++-
    1 files changed, 2 insertions(+), 1 deletions(-)

    diff --git a/fs/unionfs/dentry.c b/fs/unionfs/dentry.c
    index d969640..cd15243 100644
    --- a/fs/unionfs/dentry.c
    +++ b/fs/unionfs/dentry.c
    @@ -507,9 +507,10 @@ static void unionfs_d_iput(struct dentry *dentry, struct inode *inode)
    {
    int bindex, rc;

    + BUG_ON(!dentry);
    unionfs_read_lock(dentry->d_sb, UNIONFS_SMUTEX_CHILD);

    - if (dbstart(dentry) < 0)
    + if (!UNIONFS_D(dentry) || dbstart(dentry) < 0)
    goto drop_lower_inodes;
    for (bindex = dbstart(dentry); bindex <= dbend(dentry); bindex++) {
    if (unionfs_lower_mnt_idx(dentry, bindex)) {
    --
    1.5.2.2


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