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path: root/drivers/base/devtmpfs.c
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Diffstat (limited to 'drivers/base/devtmpfs.c')
-rw-r--r--drivers/base/devtmpfs.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 090dd4851301..dac478c6e460 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -301,6 +301,19 @@ int devtmpfs_delete_node(struct device *dev)
if (dentry->d_inode) {
err = vfs_getattr(nd.path.mnt, dentry, &stat);
if (!err && dev_mynode(dev, dentry->d_inode, &stat)) {
+ struct iattr newattrs;
+ /*
+ * before unlinking this node, reset permissions
+ * of possible references like hardlinks
+ */
+ newattrs.ia_uid = 0;
+ newattrs.ia_gid = 0;
+ newattrs.ia_mode = stat.mode & ~0777;
+ newattrs.ia_valid =
+ ATTR_UID|ATTR_GID|ATTR_MODE;
+ mutex_lock(&dentry->d_inode->i_mutex);
+ notify_change(dentry, &newattrs);
+ mutex_unlock(&dentry->d_inode->i_mutex);
err = vfs_unlink(nd.path.dentry->d_inode,
dentry);
if (!err || err == -ENOENT)
@@ -354,6 +367,7 @@ int __init devtmpfs_init(void)
{
int err;
struct vfsmount *mnt;
+ char options[] = "mode=0755";
err = register_filesystem(&dev_fs_type);
if (err) {
@@ -362,7 +376,7 @@ int __init devtmpfs_init(void)
return err;
}
- mnt = kern_mount_data(&dev_fs_type, "mode=0755");
+ mnt = kern_mount_data(&dev_fs_type, options);
if (IS_ERR(mnt)) {
err = PTR_ERR(mnt);
printk(KERN_ERR "devtmpfs: unable to create devtmpfs %i\n", err);