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    Subject[patch 09/47] eCryptfs: protect crypt_stat->flags in ecryptfs_open()
    -stable review patch.  If anyone has any objections, please let us know.

    ------------------
    From: Michael Halcrow <mhalcrow@us.ibm.com>

    upstream commit: 2f9b12a31fcb738ea8c9eb0d4ddf906c6f1d696c

    Make sure crypt_stat->flags is protected with a lock in ecryptfs_open().

    Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
    Cc: Al Viro <viro@ZenIV.linux.org.uk>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Chris Wright <chrisw@sous-sol.org>
    ---
    fs/ecryptfs/file.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/fs/ecryptfs/file.c
    +++ b/fs/ecryptfs/file.c
    @@ -195,7 +195,9 @@ static int ecryptfs_open(struct inode *i
    file, ecryptfs_inode_to_private(inode)->lower_file);
    if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
    ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
    + mutex_lock(&crypt_stat->cs_mutex);
    crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
    + mutex_unlock(&crypt_stat->cs_mutex);
    rc = 0;
    goto out;
    }
    --


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