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    Subject[PATCH v8 34/41] ext4: Don't allow unmapped identifiers in richacls
    Date
    Don't allow acls which contain unmapped identifiers: they are meaningful
    for remote file systems only.

    Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
    ---
    fs/ext4/richacl.c | 7 ++++++-
    1 file changed, 6 insertions(+), 1 deletion(-)

    diff --git a/fs/ext4/richacl.c b/fs/ext4/richacl.c
    index 6758def..ca6e0cb 100644
    --- a/fs/ext4/richacl.c
    +++ b/fs/ext4/richacl.c
    @@ -68,8 +68,13 @@ ext4_set_richacl(handle_t *handle, struct inode *inode, struct richacl *acl)
    int retval;

    if (acl) {
    - mode_t mode = inode->i_mode;
    + mode_t mode;

    + /* Don't allow acls with unmapped identifiers. */
    + if (richacl_has_unmapped_identifiers(acl))
    + return -EINVAL;
    +
    + mode = inode->i_mode;
    if (richacl_equiv_mode(acl, &mode) == 0) {
    inode->i_mode = mode;
    ext4_mark_inode_dirty(handle, inode);
    --
    2.4.3


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