Fix race between proc_get_inode() and remove_proc_entry()

[mirror_ubuntu-zesty-kernel.git] / fs / proc / generic.c

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 775fb21294d821419ed6b7e0939d963dd6d00e87..22a08ff3475de39b203806a55076cc02e8a13dfc 100644 (file)
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -398,6 +398,7 @@ struct dentry *proc_lookup(struct inode * dir, struct dentry *dentry, struct nam
                        if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
                                unsigned int ino = de->low_ino;
 
+                               de_get(de);
                                spin_unlock(&proc_subdir_lock);
                                error = -EINVAL;
                                inode = proc_get_inode(dir->i_sb, ino, de);
@@ -414,6 +415,7 @@ struct dentry *proc_lookup(struct inode * dir, struct dentry *dentry, struct nam
                d_add(dentry, inode);
                return NULL;
        }
+       de_put(de);
        return ERR_PTR(error);
 }