Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ns: add asserts for initial namespace active reference counts
They always remain fixed at one. Notice when that assumptions is broken.
Link: https://patch.msgid.link/20251110-work-namespace-nstree-fixes-v1-14-e8a9264e0fb9@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
+4
+4
include/linux/ns_common.h
+4
include/linux/ns_common.h
···
69
69
{
70
70
if (is_ns_init_id(ns)) {
71
71
VFS_WARN_ON_ONCE(__ns_ref_read(ns) != 1);
72
+
VFS_WARN_ON_ONCE(__ns_ref_active_read(ns) != 1);
72
73
return false;
73
74
}
74
75
if (refcount_dec_and_test(&ns->__ns_ref)) {
···
83
82
{
84
83
if (is_ns_init_id(ns)) {
85
84
VFS_WARN_ON_ONCE(__ns_ref_read(ns) != 1);
85
+
VFS_WARN_ON_ONCE(__ns_ref_active_read(ns) != 1);
86
86
return true;
87
87
}
88
88
if (refcount_inc_not_zero(&ns->__ns_ref))
···
96
94
{
97
95
if (is_ns_init_id(ns)) {
98
96
VFS_WARN_ON_ONCE(__ns_ref_read(ns) != 1);
97
+
VFS_WARN_ON_ONCE(__ns_ref_active_read(ns) != 1);
99
98
return;
100
99
}
101
100
refcount_inc(&ns->__ns_ref);
···
107
104
{
108
105
if (is_ns_init_id(ns)) {
109
106
VFS_WARN_ON_ONCE(__ns_ref_read(ns) != 1);
107
+
VFS_WARN_ON_ONCE(__ns_ref_active_read(ns) != 1);
110
108
return false;
111
109
}
112
110
return refcount_dec_and_lock(&ns->__ns_ref, ns_lock);