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, 23 insertions, 0 deletions

diff --git a/sound/soc/rockchip/Makefile b/sound/soc/rockchip/Makefile
new file mode 100644
index 000000000..af6dc1165
--- /dev/null
+++ b/sound/soc/rockchip/Makefile
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0
+# ROCKCHIP Platform Support
+snd-soc-rockchip-i2s-y := rockchip_i2s.o
+snd-soc-rockchip-i2s-tdm-y := rockchip_i2s_tdm.o
+snd-soc-rockchip-pdm-y := rockchip_pdm.o
+snd-soc-rockchip-sai-y := rockchip_sai.o
+snd-soc-rockchip-spdif-y := rockchip_spdif.o
+
+obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-rockchip-i2s.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_PDM) += snd-soc-rockchip-pdm.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_SAI) += snd-soc-rockchip-sai.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_SPDIF) += snd-soc-rockchip-spdif.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S_TDM) += snd-soc-rockchip-i2s-tdm.o
+
+snd-soc-rockchip-max98090-y := rockchip_max98090.o
+snd-soc-rockchip-rt5645-y := rockchip_rt5645.o
+snd-soc-rk3288-hdmi-analog-y := rk3288_hdmi_analog.o
+snd-soc-rk3399-gru-sound-y := rk3399_gru_sound.o
+
+obj-$(CONFIG_SND_SOC_ROCKCHIP_MAX98090) += snd-soc-rockchip-max98090.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_RT5645) += snd-soc-rockchip-rt5645.o
+obj-$(CONFIG_SND_SOC_RK3288_HDMI_ANALOG) += snd-soc-rk3288-hdmi-analog.o
+obj-$(CONFIG_SND_SOC_RK3399_GRU_SOUND) += snd-soc-rk3399-gru-sound.o