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 --- drivers/acpi/apei/Makefile | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 drivers/acpi/apei/Makefile (limited to 'drivers/acpi/apei/Makefile') diff --git a/drivers/acpi/apei/Makefile b/drivers/acpi/apei/Makefile new file mode 100644 index 000000000..66588d6be --- /dev/null +++ b/drivers/acpi/apei/Makefile @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_ACPI_APEI) += apei.o +obj-$(CONFIG_ACPI_APEI_GHES) += ghes.o +# clang versions prior to 18 may blow out the stack with KASAN +ifeq ($(CONFIG_COMPILE_TEST)_$(CONFIG_CC_IS_CLANG)_$(call clang-min-version, 180000),y_y_) +KASAN_SANITIZE_ghes.o := n +endif +obj-$(CONFIG_ACPI_APEI_PCIEAER) += ghes_helpers.o +obj-$(CONFIG_ACPI_APEI_EINJ) += einj.o +einj-y := einj-core.o +einj-$(CONFIG_ACPI_APEI_EINJ_CXL) += einj-cxl.o +obj-$(CONFIG_ACPI_APEI_ERST_DEBUG) += erst-dbg.o +obj-$(CONFIG_ACPI_APEI_GHES_NVIDIA) += ghes-nvidia.o + +apei-y := apei-base.o hest.o erst.o bert.o -- cgit v1.3.1