generic: test two vfsmount no peers
This test cover linux commit 7ae8fd0, when mnt_group_id=0, it means
this mount no peers. But this bug treat two zero mnt_group_id as
peers. And it cause a crash by dereference a NULL address.
As below, the crash will happen when mount fs on "B/mnt1/mnt2":
shared New FS shared
-----------------------[A/mnt1]----------------------
| | |
| bind | bind |
[C/mnt1]--[slave C]<------[shared A]------>[slave B]--[B/mnt1]
|
|
[B/mnt1/mnt2]
(New FS)
Signed-off-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
3 files changed
