bpf: mark a NULL kfunc argument precisegrafted

check_kfunc_arg() allows bpf_register_is_null() for nullable arguments
w/o marking the underlying scalar register precise. Hence a checkpoint
created on such a path would prune against arbitrary scalar value.

Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)")
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 26 insertions, 0 deletions

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)