eCryptfs: protect crypt_stat->flags in ecryptfs_open()

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>

diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 2b8f5ed..2258b8f 100644 (file)
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -195,7 +195,9 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
                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;
        }