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 --- arch/powerpc/perf/Makefile | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 arch/powerpc/perf/Makefile (limited to 'arch/powerpc/perf/Makefile') diff --git a/arch/powerpc/perf/Makefile b/arch/powerpc/perf/Makefile new file mode 100644 index 000000000..bcc804c41 --- /dev/null +++ b/arch/powerpc/perf/Makefile @@ -0,0 +1,26 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-y += callchain.o callchain_$(BITS).o perf_regs.o +obj-$(CONFIG_COMPAT) += callchain_32.o + +obj-$(CONFIG_PPC_PERF_CTRS) += core-book3s.o +obj64-$(CONFIG_PPC_PERF_CTRS) += ppc970-pmu.o power5-pmu.o \ + power5+-pmu.o power6-pmu.o power7-pmu.o \ + isa207-common.o power8-pmu.o power9-pmu.o \ + generic-compat-pmu.o power10-pmu.o bhrb.o power12-pmu.o +obj32-$(CONFIG_PPC_PERF_CTRS) += mpc7450-pmu.o + +obj-$(CONFIG_PPC_POWERNV) += imc-pmu.o +obj-$(CONFIG_FSL_EMB_PERF_EVENT) += core-fsl-emb.o +obj-$(CONFIG_FSL_EMB_PERF_EVENT_E500) += e500-pmu.o e6500-pmu.o + +obj-$(CONFIG_HV_PERF_CTRS) += hv-24x7.o hv-gpci.o hv-common.o vpa-dtl.o + +obj-$(CONFIG_VPA_PMU) += vpa-pmu.o + +obj-$(CONFIG_KVM_BOOK3S_HV_PMU) += kvm-hv-pmu.o + +obj-$(CONFIG_PPC_8xx) += 8xx-pmu.o + +obj-$(CONFIG_PPC64) += $(obj64-y) +obj-$(CONFIG_PPC32) += $(obj32-y) -- cgit v1.3.1