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, 81 insertions, 0 deletions

diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
new file mode 100644
index 000000000..d656a9ab5
--- /dev/null
+++ b/sound/soc/fsl/Makefile
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: GPL-2.0
+# P1022 DS Machine Support
+snd-soc-p1022-ds-y := p1022_ds.o
+obj-$(CONFIG_SND_SOC_P1022_DS) += snd-soc-p1022-ds.o
+
+# P1022 RDK Machine Support
+snd-soc-p1022-rdk-y := p1022_rdk.o
+obj-$(CONFIG_SND_SOC_P1022_RDK) += snd-soc-p1022-rdk.o
+
+# Freescale SSI/DMA/SAI/SPDIF Support
+snd-soc-fsl-audmix-y := fsl_audmix.o
+snd-soc-fsl-asoc-card-y := fsl-asoc-card.o
+snd-soc-fsl-asrc-y := fsl_asrc.o fsl_asrc_dma.o fsl_asrc_m2m.o
+snd-soc-fsl-lpc3xxx-y := lpc3xxx-pcm.o lpc3xxx-i2s.o
+snd-soc-fsl-sai-y := fsl_sai.o
+snd-soc-fsl-ssi-y := fsl_ssi.o
+snd-soc-fsl-ssi-$(CONFIG_DEBUG_FS) += fsl_ssi_dbg.o
+snd-soc-fsl-spdif-y := fsl_spdif.o
+snd-soc-fsl-esai-y := fsl_esai.o
+snd-soc-fsl-micfil-y := fsl_micfil.o
+snd-soc-fsl-utils-y := fsl_utils.o
+snd-soc-fsl-dma-y := fsl_dma.o
+snd-soc-fsl-mqs-y := fsl_mqs.o
+snd-soc-fsl-easrc-y := fsl_easrc.o
+snd-soc-fsl-xcvr-y := fsl_xcvr.o
+snd-soc-fsl-aud2htx-y := fsl_aud2htx.o
+snd-soc-fsl-rpmsg-y := fsl_rpmsg.o
+snd-soc-fsl-qmc-audio-y := fsl_qmc_audio.o
+
+obj-$(CONFIG_SND_SOC_FSL_AUDMIX) += snd-soc-fsl-audmix.o
+obj-$(CONFIG_SND_SOC_FSL_ASOC_CARD) += snd-soc-fsl-asoc-card.o
+obj-$(CONFIG_SND_SOC_FSL_ASRC) += snd-soc-fsl-asrc.o
+obj-$(CONFIG_SND_SOC_FSL_LPC3XXX) += snd-soc-fsl-lpc3xxx.o
+obj-$(CONFIG_SND_SOC_FSL_SAI) += snd-soc-fsl-sai.o
+obj-$(CONFIG_SND_SOC_FSL_SSI) += snd-soc-fsl-ssi.o
+obj-$(CONFIG_SND_SOC_FSL_SPDIF) += snd-soc-fsl-spdif.o
+obj-$(CONFIG_SND_SOC_FSL_ESAI) += snd-soc-fsl-esai.o
+obj-$(CONFIG_SND_SOC_FSL_MICFIL) += snd-soc-fsl-micfil.o
+obj-$(CONFIG_SND_SOC_FSL_UTILS) += snd-soc-fsl-utils.o
+obj-$(CONFIG_SND_SOC_FSL_MQS) += snd-soc-fsl-mqs.o
+obj-$(CONFIG_SND_SOC_FSL_EASRC) += snd-soc-fsl-easrc.o
+obj-$(CONFIG_SND_SOC_POWERPC_DMA) += snd-soc-fsl-dma.o
+obj-$(CONFIG_SND_SOC_FSL_XCVR) += snd-soc-fsl-xcvr.o
+obj-$(CONFIG_SND_SOC_FSL_AUD2HTX) += snd-soc-fsl-aud2htx.o
+obj-$(CONFIG_SND_SOC_FSL_RPMSG) += snd-soc-fsl-rpmsg.o
+obj-$(CONFIG_SND_SOC_POWERPC_QMC_AUDIO) += snd-soc-fsl-qmc-audio.o
+
+# MPC5200 Platform Support
+obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o
+obj-$(CONFIG_SND_SOC_MPC5200_I2S) += mpc5200_psc_i2s.o
+obj-$(CONFIG_SND_SOC_MPC5200_AC97) += mpc5200_psc_ac97.o
+
+# MPC5200 Machine Support
+obj-$(CONFIG_SND_MPC52xx_SOC_PCM030) += pcm030-audio-fabric.o
+obj-$(CONFIG_SND_MPC52xx_SOC_EFIKA) += efika-audio-fabric.o
+
+# i.MX Platform Support
+snd-soc-imx-audmux-y := imx-audmux.o
+obj-$(CONFIG_SND_SOC_IMX_AUDMUX) += snd-soc-imx-audmux.o
+
+obj-$(CONFIG_SND_SOC_IMX_PCM_FIQ) += imx-pcm-fiq.o
+obj-$(CONFIG_SND_SOC_IMX_PCM_DMA) += imx-pcm-dma.o
+obj-$(CONFIG_SND_SOC_IMX_AUDIO_RPMSG) += imx-audio-rpmsg.o
+obj-$(CONFIG_SND_SOC_IMX_PCM_RPMSG) += imx-pcm-rpmsg.o
+
+# i.MX Machine Support
+snd-soc-eukrea-tlv320-y := eukrea-tlv320.o
+snd-soc-imx-es8328-y := imx-es8328.o
+snd-soc-imx-sgtl5000-y := imx-sgtl5000.o
+snd-soc-imx-audmix-y := imx-audmix.o
+snd-soc-imx-hdmi-y := imx-hdmi.o
+snd-soc-imx-rpmsg-y := imx-rpmsg.o
+snd-soc-imx-card-y := imx-card.o
+
+obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
+obj-$(CONFIG_SND_SOC_IMX_ES8328) += snd-soc-imx-es8328.o
+obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
+obj-$(CONFIG_SND_SOC_IMX_AUDMIX) += snd-soc-imx-audmix.o
+obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o
+obj-$(CONFIG_SND_SOC_IMX_RPMSG) += snd-soc-imx-rpmsg.o
+obj-$(CONFIG_SND_SOC_IMX_CARD) += snd-soc-imx-card.o