This is a note to let you know that I've just added the patch titled mnt: In detach_mounts detach the appropriate unmounted mount to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mnt-in-detach_mounts-detach-the-appropriate-unmounted-mount.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From fe78fcc85a2046c51f1535710996860557eeec20 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> Date: Fri, 17 Jul 2015 14:54:27 -0500 Subject: mnt: In detach_mounts detach the appropriate unmounted mount From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> commit fe78fcc85a2046c51f1535710996860557eeec20 upstream. The handling of in detach_mounts of unmounted but connected mounts is buggy and can lead to an infinite loop. Correct the handling of unmounted mounts in detach_mount. When the mountpoint of an unmounted but connected mount is connected to a dentry, and that dentry is deleted we need to disconnect that mount from the parent mount and the deleted dentry. Nothing changes for the unmounted and connected children. They can be safely ignored. Fixes: ce07d891a0891d3c0d0c2d73d577490486b809e1 mnt: Honor MNT_LOCKED when detaching mounts Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/namespace.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1554,11 +1554,8 @@ void __detach_mounts(struct dentry *dent while (!hlist_empty(&mp->m_list)) { mnt = hlist_entry(mp->m_list.first, struct mount, mnt_mp_list); if (mnt->mnt.mnt_flags & MNT_UMOUNT) { - struct mount *p, *tmp; - list_for_each_entry_safe(p, tmp, &mnt->mnt_mounts, mnt_child) { - hlist_add_head(&p->mnt_umount.s_list, &unmounted); - umount_mnt(p); - } + hlist_add_head(&mnt->mnt_umount.s_list, &unmounted); + umount_mnt(mnt); } else umount_tree(mnt, UMOUNT_CONNECTED); } Patches currently in stable-queue which might be from ebiederm@xxxxxxxxxxxx are queue-4.1/mnt-clarify-and-correct-the-disconnect-logic-in-umount_tree.patch queue-4.1/mnt-in-detach_mounts-detach-the-appropriate-unmounted-mount.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html