From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock Add a sleepable verifier test that loads a graph-node local kptr in an explicit RCU read-side critical section, then passes its node to bpf_rbtree_remove() after the section ends. Before the verifier fix, the stale NON_OWN_REF flag makes the node look like a live borrowed reference and the program is accepted. After the fix, the pointer is demoted without NON_OWN_REF and the graph kfunc argument is rejected. Also exercise a graph kptr loaded while a spin lock provides implicit RCU protection. The pointer must be invalidated when the lock is released, which guards the required ordering between non-owning-reference invalidation and RCU demotion. Update the existing fault-protected load test state description. The post-unlock pointer no longer carries NON_OWN_REF, but remains readable because the load is rewritten to use BPF_PROBE_MEM. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- security/selinux/include/conditional.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 security/selinux/include/conditional.h (limited to 'security/selinux/include/conditional.h') diff --git a/security/selinux/include/conditional.h b/security/selinux/include/conditional.h new file mode 100644 index 000000000..060833e2d --- /dev/null +++ b/security/selinux/include/conditional.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Interface to booleans in the security server. This is exported + * for the selinuxfs. + * + * Author: Karl MacMillan + * + * Copyright (C) 2003 - 2004 Tresys Technology, LLC + */ + +#ifndef _SELINUX_CONDITIONAL_H_ +#define _SELINUX_CONDITIONAL_H_ + +#include "security.h" + +int security_get_bools(struct selinux_policy *policy, u32 *len, char ***names, + int **values); + +int security_set_bools(u32 len, const int *values); + +int security_get_bool_value(u32 index); + +#endif -- cgit v1.3.1