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, 157 insertions, 0 deletions

diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
new file mode 100644
index 000000000..edfdcbf73
--- /dev/null
+++ b/sound/soc/Kconfig
@@ -0,0 +1,157 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# SoC audio configuration
+#
+
+menuconfig SND_SOC
+	tristate "ALSA for SoC audio support"
+	select SND_PCM
+	select AC97_BUS if SND_SOC_AC97_BUS
+	select SND_JACK
+	select REGMAP_I2C if I2C
+	select REGMAP_SPI if SPI_MASTER
+	help
+
+	  If you want ASoC support, you should say Y here and also to the
+	  specific driver for your SoC platform below.
+
+	  ASoC provides power efficient ALSA support for embedded battery powered
+	  SoC based systems like PDA's, Phones and Personal Media Players.
+
+	  This ASoC audio support can also be built as a module.  If so, the module
+	  will be called snd-soc-core.
+
+if SND_SOC
+
+config SND_SOC_AC97_BUS
+	bool
+
+config SND_SOC_GENERIC_DMAENGINE_PCM
+	bool
+	select SND_DMAENGINE_PCM
+
+config SND_SOC_COMPRESS
+	bool
+	select SND_COMPRESS_OFFLOAD
+
+config SND_SOC_TOPOLOGY
+	bool
+	select SND_DYNAMIC_MINORS
+
+config SND_SOC_TOPOLOGY_BUILD
+	bool "Build topology core"
+	select SND_SOC_TOPOLOGY
+	depends on KUNIT
+	help
+	  This option exists to facilitate running the KUnit tests for
+	  the topology core, KUnit is frequently tested in virtual
+	  environments with minimal drivers enabled but the topology
+	  core is usually selected by drivers.  There is little reason
+	  to enable it if not doing a KUnit build.
+
+config SND_SOC_TOPOLOGY_KUNIT_TEST
+	tristate "KUnit tests for SoC topology"
+	depends on KUNIT
+	depends on SND_SOC_TOPOLOGY
+	default KUNIT_ALL_TESTS
+	help
+	  If you want to perform tests on ALSA SoC topology support say Y here.
+
+	  This builds a module which can be later manually loaded to run KUNIT
+	  test cases against soc-topology.c API. This should be primarily used
+	  by developers to test their changes to ASoC.
+
+	  Do note that it creates fake playback devices which do not interact
+	  well with userspace. When running tests one may want to disable
+	  userspace applications such as pulseaudio, to prevent unnecessary
+	  problems.
+
+config SND_SOC_CARD_KUNIT_TEST
+	tristate "KUnit tests for SoC card"
+	depends on KUNIT
+	default KUNIT_ALL_TESTS
+	help
+	  If you want to perform tests on ALSA SoC card functions say Y here.
+	  If unsure, say N.
+
+config SND_SOC_UTILS_KUNIT_TEST
+	tristate "KUnit tests for SoC utils"
+	depends on KUNIT
+	default KUNIT_ALL_TESTS
+	help
+	  If you want to perform tests on ALSA SoC utils library say Y here.
+
+config SND_SOC_OPS_KUNIT_TEST
+	tristate "KUnit tests for SoC ops"
+	depends on KUNIT
+	default KUNIT_ALL_TESTS
+	help
+	  If you want to perform tests on ALSA SoC ops library say Y here.
+
+config SND_SOC_ACPI
+	tristate
+
+config SND_SOC_USB
+	tristate "SoC based USB audio offloading"
+	depends on SND_USB_AUDIO
+	help
+	  Enable this option if an ASoC platform card has support to handle
+	  USB audio offloading.  This enables the SoC USB layer, which will
+	  notify the ASoC USB DPCM backend DAI link about available USB audio
+	  devices.  Based on the notifications, sequences to enable the audio
+	  stream can be taken based on the design.
+
+# All the supported SoCs
+source "sound/soc/adi/Kconfig"
+source "sound/soc/amd/Kconfig"
+source "sound/soc/apple/Kconfig"
+source "sound/soc/atmel/Kconfig"
+source "sound/soc/au1x/Kconfig"
+source "sound/soc/bcm/Kconfig"
+source "sound/soc/cirrus/Kconfig"
+source "sound/soc/dwc/Kconfig"
+source "sound/soc/fsl/Kconfig"
+source "sound/soc/google/Kconfig"
+source "sound/soc/hisilicon/Kconfig"
+source "sound/soc/jz4740/Kconfig"
+source "sound/soc/kirkwood/Kconfig"
+source "sound/soc/loongson/Kconfig"
+source "sound/soc/img/Kconfig"
+source "sound/soc/intel/Kconfig"
+source "sound/soc/mediatek/Kconfig"
+source "sound/soc/meson/Kconfig"
+source "sound/soc/mxs/Kconfig"
+source "sound/soc/pxa/Kconfig"
+source "sound/soc/qcom/Kconfig"
+source "sound/soc/renesas/Kconfig"
+source "sound/soc/rockchip/Kconfig"
+source "sound/soc/samsung/Kconfig"
+source "sound/soc/sdca/Kconfig"
+source "sound/soc/sophgo/Kconfig"
+source "sound/soc/spacemit/Kconfig"
+source "sound/soc/spear/Kconfig"
+source "sound/soc/sprd/Kconfig"
+source "sound/soc/starfive/Kconfig"
+source "sound/soc/sti/Kconfig"
+source "sound/soc/stm/Kconfig"
+source "sound/soc/sunxi/Kconfig"
+source "sound/soc/tegra/Kconfig"
+source "sound/soc/ti/Kconfig"
+source "sound/soc/uniphier/Kconfig"
+source "sound/soc/ux500/Kconfig"
+source "sound/soc/xilinx/Kconfig"
+source "sound/soc/xtensa/Kconfig"
+
+# SOF
+source "sound/soc/sof/Kconfig"
+
+# Supported codecs
+source "sound/soc/codecs/Kconfig"
+
+source "sound/soc/sdw_utils/Kconfig"
+
+# generic frame-work
+source "sound/soc/generic/Kconfig"
+
+endif	# SND_SOC
+