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    Subject[PATCH 4.4 03/40] cifs: check MaxPathNameComponentLength != 0 before using it
    Date
    4.4-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Ronnie Sahlberg <lsahlber@redhat.com>

    commit f74bc7c6679200a4a83156bb89cbf6c229fe8ec0 upstream.

    And fix tcon leak in error path.

    Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
    Signed-off-by: Steve French <smfrench@gmail.com>
    Reviewed-by: David Disseldorp <ddiss@samba.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    fs/cifs/dir.c | 5 +++--
    1 file changed, 3 insertions(+), 2 deletions(-)

    --- a/fs/cifs/dir.c
    +++ b/fs/cifs/dir.c
    @@ -193,7 +193,8 @@ check_name(struct dentry *direntry, stru
    struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
    int i;

    - if (unlikely(direntry->d_name.len >
    + if (unlikely(tcon->fsAttrInfo.MaxPathNameComponentLength &&
    + direntry->d_name.len >
    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
    return -ENAMETOOLONG;

    @@ -509,7 +510,7 @@ cifs_atomic_open(struct inode *inode, st

    rc = check_name(direntry, tcon);
    if (rc)
    - goto out_free_xid;
    + goto out;

    server = tcon->ses->server;


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