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    Subject[PATCH 04/25] Unionfs: cache-coherency fixes
    Date
    From: Olivier Blin <blino@mandriva.com>

    Do not update mtime if there is no upper branch for the inode. This
    prevents from calling unionfs_lower_inode_idx() with a negative index, which
    triggers a bug.

    Signed-off-by: Olivier Blin <blino@mandriva.com>
    Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
    ---
    fs/unionfs/fanout.h | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/fs/unionfs/fanout.h b/fs/unionfs/fanout.h
    index afeb9f6..51aa0de 100644
    --- a/fs/unionfs/fanout.h
    +++ b/fs/unionfs/fanout.h
    @@ -308,7 +308,7 @@ static inline void unionfs_copy_attr_times(struct inode *upper)
    int bindex;
    struct inode *lower;

    - if (!upper)
    + if (!upper || ibstart(upper) < 0)
    return;
    for (bindex=ibstart(upper); bindex <= ibend(upper); bindex++) {
    lower = unionfs_lower_inode_idx(upper, bindex);
    --
    1.5.2.2
    -
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