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/riscv/kvm/Makefile | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 arch/riscv/kvm/Makefile (limited to 'arch/riscv/kvm/Makefile') diff --git a/arch/riscv/kvm/Makefile b/arch/riscv/kvm/Makefile new file mode 100644 index 000000000..296c2ba05 --- /dev/null +++ b/arch/riscv/kvm/Makefile @@ -0,0 +1,44 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for RISC-V KVM support +# + +ccflags-y += -I $(src) + +include $(srctree)/virt/kvm/Makefile.kvm + +obj-$(CONFIG_KVM) += kvm.o + +# Ordered alphabetically +kvm-y += aia.o +kvm-y += aia_aplic.o +kvm-y += aia_device.o +kvm-y += aia_imsic.o +kvm-y += gstage.o +kvm-y += isa.o +kvm-y += main.o +kvm-y += mmu.o +kvm-y += nacl.o +kvm-y += tlb.o +kvm-y += vcpu.o +kvm-y += vcpu_config.o +kvm-y += vcpu_exit.o +kvm-y += vcpu_fp.o +kvm-y += vcpu_insn.o +kvm-y += vcpu_onereg.o +kvm-$(CONFIG_RISCV_PMU_SBI) += vcpu_pmu.o +kvm-y += vcpu_sbi.o +kvm-y += vcpu_sbi_base.o +kvm-y += vcpu_sbi_forward.o +kvm-y += vcpu_sbi_fwft.o +kvm-y += vcpu_sbi_hsm.o +kvm-$(CONFIG_RISCV_PMU_SBI) += vcpu_sbi_pmu.o +kvm-y += vcpu_sbi_replace.o +kvm-y += vcpu_sbi_sta.o +kvm-y += vcpu_sbi_system.o +kvm-$(CONFIG_RISCV_SBI_V01) += vcpu_sbi_v01.o +kvm-y += vcpu_switch.o +kvm-y += vcpu_timer.o +kvm-y += vcpu_vector.o +kvm-y += vm.o +kvm-y += vmid.o -- cgit v1.3.1