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/crypto/Makefile | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 arch/powerpc/crypto/Makefile (limited to 'arch/powerpc/crypto/Makefile') diff --git a/arch/powerpc/crypto/Makefile b/arch/powerpc/crypto/Makefile new file mode 100644 index 000000000..a1fe102a9 --- /dev/null +++ b/arch/powerpc/crypto/Makefile @@ -0,0 +1,35 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# powerpc/crypto/Makefile +# +# Arch-specific CryptoAPI modules. +# + +obj-$(CONFIG_CRYPTO_AES_PPC_SPE) += aes-ppc-spe.o +obj-$(CONFIG_CRYPTO_AES_GCM_P10) += aes-gcm-p10-crypto.o +obj-$(CONFIG_CRYPTO_DEV_VMX_ENCRYPT) += vmx-crypto.o + +aes-ppc-spe-y := aes-spe-glue.o +aes-gcm-p10-crypto-y := aes-gcm-p10-glue.o aes-gcm-p10.o ghashp10-ppc.o aesp10-ppc.o +vmx-crypto-objs := vmx.o aes_cbc.o aes_ctr.o aes_xts.o + +ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) +override flavour := linux-ppc64le +else +ifdef CONFIG_PPC64_ELF_ABI_V2 +override flavour := linux-ppc64-elfv2 +else +override flavour := linux-ppc64 +endif +endif + +quiet_cmd_perl = PERL $@ + cmd_perl = $(PERL) $< $(flavour) > $@ + +targets += aesp10-ppc.S ghashp10-ppc.S + +$(obj)/aesp10-ppc.S $(obj)/ghashp10-ppc.S: $(obj)/%.S: $(src)/%.pl FORCE + $(call if_changed,perl) + +OBJECT_FILES_NON_STANDARD_aesp10-ppc.o := y +OBJECT_FILES_NON_STANDARD_ghashp10-ppc.o := y -- cgit v1.3.1