oprofilefs: add missing ->i_mutex locking in object creation
Right now it's safe only during initial mount *and* functions are asking
to be abused for dynamic adding of objects.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
index 849357c..445ffda 100644
--- a/drivers/oprofile/oprofilefs.c
+++ b/drivers/oprofile/oprofilefs.c
@@ -139,17 +139,22 @@
struct dentry *dentry;
struct inode *inode;
+ mutex_lock(&root->d_inode->i_mutex);
dentry = d_alloc_name(root, name);
- if (!dentry)
+ if (!dentry) {
+ mutex_unlock(&root->d_inode->i_mutex);
return -ENOMEM;
+ }
inode = oprofilefs_get_inode(sb, S_IFREG | perm);
if (!inode) {
dput(dentry);
+ mutex_unlock(&root->d_inode->i_mutex);
return -ENOMEM;
}
inode->i_fop = fops;
+ inode->i_private = priv;
d_add(dentry, inode);
- dentry->d_inode->i_private = priv;
+ mutex_unlock(&root->d_inode->i_mutex);
return 0;
}
@@ -212,17 +217,22 @@
struct dentry *dentry;
struct inode *inode;
+ mutex_lock(&root->d_inode->i_mutex);
dentry = d_alloc_name(root, name);
- if (!dentry)
+ if (!dentry) {
+ mutex_unlock(&root->d_inode->i_mutex);
return NULL;
+ }
inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
if (!inode) {
dput(dentry);
+ mutex_unlock(&root->d_inode->i_mutex);
return NULL;
}
inode->i_op = &simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
d_add(dentry, inode);
+ mutex_unlock(&root->d_inode->i_mutex);
return dentry;
}