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Diffstat (limited to 'kernel/nscommon.c')
-rw-r--r--kernel/nscommon.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/kernel/nscommon.c b/kernel/nscommon.c
index bfd2d6805776..c910b979e433 100644
--- a/kernel/nscommon.c
+++ b/kernel/nscommon.c
@@ -170,8 +170,10 @@ void __ns_ref_active_put(struct ns_common *ns)
if (is_ns_init_id(ns))
return;
- if (!atomic_dec_and_test(&ns->__ns_ref_active))
+ if (!atomic_dec_and_test(&ns->__ns_ref_active)) {
+ VFS_WARN_ON_ONCE(__ns_ref_active_read(ns) < 0);
return;
+ }
VFS_WARN_ON_ONCE(is_ns_init_id(ns));
VFS_WARN_ON_ONCE(!__ns_ref_read(ns));
@@ -181,8 +183,10 @@ void __ns_ref_active_put(struct ns_common *ns)
if (!ns)
return;
VFS_WARN_ON_ONCE(is_ns_init_id(ns));
- if (!atomic_dec_and_test(&ns->__ns_ref_active))
+ if (!atomic_dec_and_test(&ns->__ns_ref_active)) {
+ VFS_WARN_ON_ONCE(__ns_ref_active_read(ns) < 0);
return;
+ }
}
}
@@ -280,12 +284,16 @@ void __ns_ref_active_put(struct ns_common *ns)
*/
void __ns_ref_active_get(struct ns_common *ns)
{
+ int prev;
+
/* Initial namespaces are always active. */
if (is_ns_init_id(ns))
return;
/* If we didn't resurrect the namespace we're done. */
- if (atomic_fetch_add(1, &ns->__ns_ref_active))
+ prev = atomic_fetch_add(1, &ns->__ns_ref_active);
+ VFS_WARN_ON_ONCE(prev < 0);
+ if (likely(prev))
return;
/*
@@ -298,7 +306,9 @@ void __ns_ref_active_get(struct ns_common *ns)
return;
VFS_WARN_ON_ONCE(is_ns_init_id(ns));
- if (atomic_fetch_add(1, &ns->__ns_ref_active))
+ prev = atomic_fetch_add(1, &ns->__ns_ref_active);
+ VFS_WARN_ON_ONCE(prev < 0);
+ if (likely(prev))
return;
}
}