selftests/bpf: Reject graph kptr use after RCU unlockgrafted

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 <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 61 insertions, 0 deletions

diff --git a/sound/soc/sof/Makefile b/sound/soc/sof/Makefile
new file mode 100644
index 000000000..b0b22e6eb
--- /dev/null
+++ b/sound/soc/sof/Makefile
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+
+snd-sof-y := core.o ops.o loader.o ipc.o pcm.o pm.o debug.o topology.o\
+		control.o trace.o iomem-utils.o sof-audio.o stream-ipc.o\
+		fw-file-profile.o
+
+# IPC implementations
+ifneq ($(CONFIG_SND_SOC_SOF_IPC3),)
+snd-sof-y +=	ipc3.o ipc3-loader.o ipc3-topology.o ipc3-control.o ipc3-pcm.o\
+		ipc3-dtrace.o
+endif
+ifneq ($(CONFIG_SND_SOC_SOF_IPC4),)
+snd-sof-y += ipc4.o ipc4-loader.o ipc4-topology.o ipc4-control.o ipc4-pcm.o\
+		ipc4-mtrace.o ipc4-telemetry.o
+endif
+
+# SOF client support
+ifneq ($(CONFIG_SND_SOC_SOF_CLIENT),)
+snd-sof-y += sof-client.o
+endif
+
+snd-sof-$(CONFIG_SND_SOC_SOF_COMPRESS) += compress.o
+
+snd-sof-pci-y := sof-pci-dev.o
+snd-sof-acpi-y := sof-acpi-dev.o
+snd-sof-of-y := sof-of-dev.o
+
+snd-sof-ipc-flood-test-y := sof-client-ipc-flood-test.o
+snd-sof-ipc-msg-injector-y := sof-client-ipc-msg-injector.o
+snd-sof-ipc-kernel-injector-y := sof-client-ipc-kernel-injector.o
+snd-sof-probes-y := sof-client-probes.o
+ifneq ($(CONFIG_SND_SOC_SOF_IPC3),)
+snd-sof-probes-y += sof-client-probes-ipc3.o
+endif
+ifneq ($(CONFIG_SND_SOC_SOF_IPC4),)
+snd-sof-probes-y += sof-client-probes-ipc4.o
+endif
+
+snd-sof-nocodec-y := nocodec.o
+
+snd-sof-utils-y := sof-utils.o
+
+obj-$(CONFIG_SND_SOC_SOF) += snd-sof.o
+obj-$(CONFIG_SND_SOC_SOF_NOCODEC) += snd-sof-nocodec.o
+
+obj-$(CONFIG_SND_SOC_SOF) += snd-sof-utils.o
+
+obj-$(CONFIG_SND_SOC_SOF_ACPI_DEV) += snd-sof-acpi.o
+obj-$(CONFIG_SND_SOC_SOF_OF_DEV) += snd-sof-of.o
+obj-$(CONFIG_SND_SOC_SOF_PCI_DEV) += snd-sof-pci.o
+
+obj-$(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST) += snd-sof-ipc-flood-test.o
+obj-$(CONFIG_SND_SOC_SOF_DEBUG_IPC_MSG_INJECTOR) += snd-sof-ipc-msg-injector.o
+obj-$(CONFIG_SND_SOC_SOF_DEBUG_IPC_KERNEL_INJECTOR) += snd-sof-ipc-kernel-injector.o
+obj-$(CONFIG_SND_SOC_SOF_DEBUG_PROBES) += snd-sof-probes.o
+
+obj-$(CONFIG_SND_SOC_SOF_INTEL_TOPLEVEL) += intel/
+obj-$(CONFIG_SND_SOC_SOF_IMX_TOPLEVEL) += imx/
+obj-$(CONFIG_SND_SOC_SOF_AMD_TOPLEVEL) += amd/
+obj-$(CONFIG_SND_SOC_SOF_XTENSA) += xtensa/
+obj-$(CONFIG_SND_SOC_SOF_MTK_TOPLEVEL) += mediatek/