From: Al Viro <viro@zeniv.linux.org.uk> mainline inclusion from mainline-v6.17-rc1 commit d5f15047f13b86b74d1ac4f39036ccae2078c492 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/ID192S CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- Lift changing ->mnt_slave from do_make_slave() into the caller. Simplifies the next steps... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Conflicts: fs/pnode.c [context diff] Signed-off-by: Yang Erkun <yangerkun@huawei.com> --- fs/pnode.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/fs/pnode.c b/fs/pnode.c index 468e4e65a615..2b5f65d2bed9 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -109,7 +109,6 @@ static int do_make_slave(struct mount *mnt) } list_for_each_entry(slave_mnt, &mnt->mnt_slave_list, mnt_slave) slave_mnt->mnt_master = master; - list_move(&mnt->mnt_slave, &master->mnt_slave_list); list_splice(&mnt->mnt_slave_list, master->mnt_slave_list.prev); INIT_LIST_HEAD(&mnt->mnt_slave_list); mnt->mnt_master = master; @@ -126,8 +125,12 @@ void change_mnt_propagation(struct mount *mnt, int type) return; } do_make_slave(mnt); - if (type != MS_SLAVE) { - list_del_init(&mnt->mnt_slave); + list_del_init(&mnt->mnt_slave); + if (type == MS_SLAVE) { + if (mnt->mnt_master) + list_add(&mnt->mnt_slave, + &mnt->mnt_master->mnt_slave_list); + } else { mnt->mnt_master = NULL; if (type == MS_UNBINDABLE) mnt->mnt.mnt_flags |= MNT_UNBINDABLE; -- 2.46.1