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, 46 insertions, 0 deletions

diff --git a/sound/soc/ti/Makefile b/sound/soc/ti/Makefile
new file mode 100644
index 000000000..421e13bc0
--- /dev/null
+++ b/sound/soc/ti/Makefile
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Platform drivers
+snd-soc-ti-edma-y := edma-pcm.o
+snd-soc-ti-sdma-y := sdma-pcm.o
+snd-soc-ti-udma-y := udma-pcm.o
+
+obj-$(CONFIG_SND_SOC_TI_EDMA_PCM) += snd-soc-ti-edma.o
+obj-$(CONFIG_SND_SOC_TI_SDMA_PCM) += snd-soc-ti-sdma.o
+obj-$(CONFIG_SND_SOC_TI_UDMA_PCM) += snd-soc-ti-udma.o
+
+# CPU DAI drivers
+snd-soc-davinci-asp-y := davinci-i2s.o
+snd-soc-davinci-mcasp-y := davinci-mcasp.o
+snd-soc-omap-dmic-y := omap-dmic.o
+snd-soc-omap-mcbsp-y := omap-mcbsp.o omap-mcbsp-st.o
+snd-soc-omap-mcpdm-y := omap-mcpdm.o
+
+obj-$(CONFIG_SND_SOC_DAVINCI_ASP) += snd-soc-davinci-asp.o
+obj-$(CONFIG_SND_SOC_DAVINCI_MCASP) += snd-soc-davinci-mcasp.o
+obj-$(CONFIG_SND_SOC_OMAP_DMIC) += snd-soc-omap-dmic.o
+obj-$(CONFIG_SND_SOC_OMAP_MCBSP) += snd-soc-omap-mcbsp.o
+obj-$(CONFIG_SND_SOC_OMAP_MCPDM) += snd-soc-omap-mcpdm.o
+
+# Machine drivers
+snd-soc-davinci-evm-y := davinci-evm.o
+snd-soc-n810-y := n810.o
+snd-soc-rx51-y := rx51.o
+snd-soc-omap3pandora-y := omap3pandora.o
+snd-soc-omap-twl4030-y := omap-twl4030.o
+snd-soc-omap-abe-twl6040-y := omap-abe-twl6040.o
+snd-soc-ams-delta-y := ams-delta.o
+snd-soc-omap-hdmi-y := omap-hdmi.o
+snd-soc-osk5912-y := osk5912.o
+snd-soc-j721e-evm-y := j721e-evm.o
+
+obj-$(CONFIG_SND_SOC_DAVINCI_EVM) += snd-soc-davinci-evm.o
+obj-$(CONFIG_SND_SOC_NOKIA_N810) += snd-soc-n810.o
+obj-$(CONFIG_SND_SOC_NOKIA_RX51) += snd-soc-rx51.o
+obj-$(CONFIG_SND_SOC_OMAP3_PANDORA) += snd-soc-omap3pandora.o
+obj-$(CONFIG_SND_SOC_OMAP3_TWL4030) += snd-soc-omap-twl4030.o
+obj-$(CONFIG_SND_SOC_OMAP_ABE_TWL6040) += snd-soc-omap-abe-twl6040.o
+obj-$(CONFIG_SND_SOC_OMAP_AMS_DELTA) += snd-soc-ams-delta.o
+obj-$(CONFIG_SND_SOC_OMAP_HDMI) += snd-soc-omap-hdmi.o
+obj-$(CONFIG_SND_SOC_OMAP_OSK5912) += snd-soc-osk5912.o
+obj-$(CONFIG_SND_SOC_J721E_EVM) += snd-soc-j721e-evm.o