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| author | Al Viro <viro@zeniv.linux.org.uk> | 2013-03-28 13:30:23 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-04-09 14:08:16 -0400 |
| commit | 52f21999c7b921a0390708b66ed286282c2e4bee (patch) | |
| tree | ff7cfd9652e1e0384a17615b21dc37ffc0c3a5c5 /fs/ecryptfs | |
| parent | de55eb1d60d2ed0f1ba5e13226d91b3bfbe1c108 (diff) | |
| download | lwn-52f21999c7b921a0390708b66ed286282c2e4bee.tar.gz lwn-52f21999c7b921a0390708b66ed286282c2e4bee.zip | |
ecryptfs: close rmmod race
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ecryptfs')
| -rw-r--r-- | fs/ecryptfs/miscdev.c | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c index 412e6eda25f8..e4141f257495 100644 --- a/fs/ecryptfs/miscdev.c +++ b/fs/ecryptfs/miscdev.c @@ -80,13 +80,6 @@ ecryptfs_miscdev_open(struct inode *inode, struct file *file) int rc; mutex_lock(&ecryptfs_daemon_hash_mux); - rc = try_module_get(THIS_MODULE); - if (rc == 0) { - rc = -EIO; - printk(KERN_ERR "%s: Error attempting to increment module use " - "count; rc = [%d]\n", __func__, rc); - goto out_unlock_daemon_list; - } rc = ecryptfs_find_daemon_by_euid(&daemon); if (!rc) { rc = -EINVAL; @@ -96,7 +89,7 @@ ecryptfs_miscdev_open(struct inode *inode, struct file *file) if (rc) { printk(KERN_ERR "%s: Error attempting to spawn daemon; " "rc = [%d]\n", __func__, rc); - goto out_module_put_unlock_daemon_list; + goto out_unlock_daemon_list; } mutex_lock(&daemon->mux); if (daemon->flags & ECRYPTFS_DAEMON_MISCDEV_OPEN) { @@ -108,9 +101,6 @@ ecryptfs_miscdev_open(struct inode *inode, struct file *file) atomic_inc(&ecryptfs_num_miscdev_opens); out_unlock_daemon: mutex_unlock(&daemon->mux); -out_module_put_unlock_daemon_list: - if (rc) - module_put(THIS_MODULE); out_unlock_daemon_list: mutex_unlock(&ecryptfs_daemon_hash_mux); return rc; @@ -147,7 +137,6 @@ ecryptfs_miscdev_release(struct inode *inode, struct file *file) "bug.\n", __func__, rc); BUG(); } - module_put(THIS_MODULE); return rc; } @@ -471,6 +460,7 @@ out_free: static const struct file_operations ecryptfs_miscdev_fops = { + .owner = THIS_MODULE, .open = ecryptfs_miscdev_open, .poll = ecryptfs_miscdev_poll, .read = ecryptfs_miscdev_read, |