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/Makefile | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 security/Makefile (limited to 'security/Makefile') diff --git a/security/Makefile b/security/Makefile new file mode 100644 index 000000000..4601230ba --- /dev/null +++ b/security/Makefile @@ -0,0 +1,31 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the kernel security code +# + +obj-$(CONFIG_KEYS) += keys/ + +# always enable default capabilities +obj-y += commoncap.o +obj-$(CONFIG_SECURITY) += lsm_syscalls.o +obj-$(CONFIG_MMU) += min_addr.o + +# Object file lists +obj-$(CONFIG_SECURITY) += security.o lsm_notifier.o lsm_init.o +obj-$(CONFIG_SECURITYFS) += inode.o +obj-$(CONFIG_SECURITY_SELINUX) += selinux/ +obj-$(CONFIG_SECURITY_SMACK) += smack/ +obj-$(CONFIG_HAS_SECURITY_AUDIT) += lsm_audit.o +obj-$(CONFIG_SECURITY_TOMOYO) += tomoyo/ +obj-$(CONFIG_SECURITY_APPARMOR) += apparmor/ +obj-$(CONFIG_SECURITY_YAMA) += yama/ +obj-$(CONFIG_SECURITY_LOADPIN) += loadpin/ +obj-$(CONFIG_SECURITY_SAFESETID) += safesetid/ +obj-$(CONFIG_SECURITY_LOCKDOWN_LSM) += lockdown/ +obj-$(CONFIG_CGROUPS) += device_cgroup.o +obj-$(CONFIG_BPF_LSM) += bpf/ +obj-$(CONFIG_SECURITY_LANDLOCK) += landlock/ +obj-$(CONFIG_SECURITY_IPE) += ipe/ + +# Object integrity file lists +obj-$(CONFIG_INTEGRITY) += integrity/ -- cgit v1.3.1