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/integrity/Makefile | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 security/integrity/Makefile (limited to 'security/integrity/Makefile') diff --git a/security/integrity/Makefile b/security/integrity/Makefile new file mode 100644 index 000000000..45dfdedbd --- /dev/null +++ b/security/integrity/Makefile @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for caching inode integrity data (iint) +# + +obj-$(CONFIG_INTEGRITY) += integrity.o + +integrity-y := iint.o +integrity-$(CONFIG_INTEGRITY_AUDIT) += integrity_audit.o +integrity-$(CONFIG_INTEGRITY_SIGNATURE) += digsig.o +integrity-$(CONFIG_INTEGRITY_ASYMMETRIC_KEYS) += digsig_asymmetric.o +integrity-$(CONFIG_INTEGRITY_PLATFORM_KEYRING) += platform_certs/platform_keyring.o +integrity-$(CONFIG_INTEGRITY_MACHINE_KEYRING) += platform_certs/machine_keyring.o +integrity-$(CONFIG_LOAD_UEFI_KEYS) += platform_certs/efi_parser.o \ + platform_certs/load_uefi.o \ + platform_certs/keyring_handler.o +integrity-$(CONFIG_LOAD_IPL_KEYS) += platform_certs/load_ipl_s390.o +integrity-$(CONFIG_LOAD_PPC_KEYS) += platform_certs/efi_parser.o \ + platform_certs/load_powerpc.o \ + platform_certs/keyring_handler.o +integrity-$(CONFIG_EFI) += efi_secureboot.o +# The relative order of the 'ima' and 'evm' LSMs depends on the order below. +obj-$(CONFIG_IMA) += ima/ +obj-$(CONFIG_EVM) += evm/ -- cgit v1.3.1