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, 48 insertions, 0 deletions

diff --git a/sound/soc/meson/Makefile b/sound/soc/meson/Makefile
new file mode 100644
index 000000000..f9ec0ebb0
--- /dev/null
+++ b/sound/soc/meson/Makefile
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+snd-soc-meson-aiu-y := aiu.o
+snd-soc-meson-aiu-y += aiu-acodec-ctrl.o
+snd-soc-meson-aiu-y += aiu-codec-ctrl.o
+snd-soc-meson-aiu-y += aiu-encoder-i2s.o
+snd-soc-meson-aiu-y += gx-formatter.o
+snd-soc-meson-aiu-y += aiu-formatter-i2s.o
+snd-soc-meson-aiu-y += aiu-encoder-spdif.o
+snd-soc-meson-aiu-y += aiu-fifo.o
+snd-soc-meson-aiu-y += aiu-fifo-i2s.o
+snd-soc-meson-aiu-y += aiu-fifo-spdif.o
+snd-soc-meson-axg-fifo-y := axg-fifo.o
+snd-soc-meson-axg-frddr-y := axg-frddr.o
+snd-soc-meson-axg-toddr-y := axg-toddr.o
+snd-soc-meson-axg-tdm-formatter-y := axg-tdm-formatter.o
+snd-soc-meson-axg-tdm-interface-y := axg-tdm-interface.o
+snd-soc-meson-axg-tdmin-y := axg-tdmin.o
+snd-soc-meson-axg-tdmout-y := axg-tdmout.o
+snd-soc-meson-axg-sound-card-y := axg-card.o
+snd-soc-meson-axg-spdifin-y := axg-spdifin.o
+snd-soc-meson-axg-spdifout-y := axg-spdifout.o
+snd-soc-meson-axg-pdm-y := axg-pdm.o
+snd-soc-meson-card-utils-y := meson-card-utils.o
+snd-soc-meson-codec-glue-y := meson-codec-glue.o
+snd-soc-meson-gx-sound-card-y := gx-card.o
+snd-soc-meson-g12a-toacodec-y := g12a-toacodec.o
+snd-soc-meson-g12a-tohdmitx-y := g12a-tohdmitx.o
+snd-soc-meson-t9015-y := t9015.o
+
+obj-$(CONFIG_SND_MESON_AIU) += snd-soc-meson-aiu.o
+obj-$(CONFIG_SND_MESON_AXG_FIFO) += snd-soc-meson-axg-fifo.o
+obj-$(CONFIG_SND_MESON_AXG_FRDDR) += snd-soc-meson-axg-frddr.o
+obj-$(CONFIG_SND_MESON_AXG_TODDR) += snd-soc-meson-axg-toddr.o
+obj-$(CONFIG_SND_MESON_AXG_TDM_FORMATTER) += snd-soc-meson-axg-tdm-formatter.o
+obj-$(CONFIG_SND_MESON_AXG_TDM_INTERFACE) += snd-soc-meson-axg-tdm-interface.o
+obj-$(CONFIG_SND_MESON_AXG_TDMIN) += snd-soc-meson-axg-tdmin.o
+obj-$(CONFIG_SND_MESON_AXG_TDMOUT) += snd-soc-meson-axg-tdmout.o
+obj-$(CONFIG_SND_MESON_AXG_SOUND_CARD) += snd-soc-meson-axg-sound-card.o
+obj-$(CONFIG_SND_MESON_AXG_SPDIFIN) += snd-soc-meson-axg-spdifin.o
+obj-$(CONFIG_SND_MESON_AXG_SPDIFOUT) += snd-soc-meson-axg-spdifout.o
+obj-$(CONFIG_SND_MESON_AXG_PDM) += snd-soc-meson-axg-pdm.o
+obj-$(CONFIG_SND_MESON_CARD_UTILS) += snd-soc-meson-card-utils.o
+obj-$(CONFIG_SND_MESON_CODEC_GLUE) += snd-soc-meson-codec-glue.o
+obj-$(CONFIG_SND_MESON_GX_SOUND_CARD) += snd-soc-meson-gx-sound-card.o
+obj-$(CONFIG_SND_MESON_G12A_TOACODEC) += snd-soc-meson-g12a-toacodec.o
+obj-$(CONFIG_SND_MESON_G12A_TOHDMITX) += snd-soc-meson-g12a-tohdmitx.o
+obj-$(CONFIG_SND_SOC_MESON_T9015) += snd-soc-meson-t9015.o