Yama: replace capable() with ns_capable()
When checking capabilities, the question we want to be asking is "does
current() have the capability in the child's namespace?"
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.l.morris@oracle.com>
diff --git a/security/yama/yama_lsm.c b/security/yama/yama_lsm.c
index c852f74..83554ee 100644
--- a/security/yama/yama_lsm.c
+++ b/security/yama/yama_lsm.c
@@ -264,11 +264,11 @@
case YAMA_SCOPE_RELATIONAL:
if (!task_is_descendant(current, child) &&
!ptracer_exception_found(current, child) &&
- !capable(CAP_SYS_PTRACE))
+ !ns_capable(task_user_ns(child), CAP_SYS_PTRACE))
rc = -EPERM;
break;
case YAMA_SCOPE_CAPABILITY:
- if (!capable(CAP_SYS_PTRACE))
+ if (!ns_capable(task_user_ns(child), CAP_SYS_PTRACE))
rc = -EPERM;
break;
case YAMA_SCOPE_NO_ATTACH: