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, 121 insertions, 0 deletions

diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
new file mode 100644
index 000000000..633673649
--- /dev/null
+++ b/sound/soc/intel/Kconfig
@@ -0,0 +1,121 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menu "Intel"
+
+config SND_SOC_INTEL_SST_TOPLEVEL
+	bool "Intel ASoC SST drivers"
+	default y
+	depends on X86 || COMPILE_TEST
+	select SND_SOC_INTEL_MACH
+	help
+	  Intel ASoC SST Platform Drivers. If you have a Intel machine that
+	  has an audio controller with a DSP and I2S or DMIC port, then
+	  enable this option by saying Y
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about Intel SST drivers.
+
+if SND_SOC_INTEL_SST_TOPLEVEL
+
+config SND_SOC_INTEL_CATPT
+	tristate "Haswell and Broadwell"
+	depends on ACPI || COMPILE_TEST
+	depends on DMADEVICES && SND_DMA_SGBUF
+	select DW_DMAC_CORE
+	select SND_SOC_ACPI if ACPI
+	select WANT_DEV_COREDUMP
+	select SND_INTEL_DSP_CONFIG
+	help
+	  Enable support for Intel(R) Haswell and Broadwell platforms
+	  with I2S codec present. This is a recommended option.
+	  Say Y or m if you have such device.
+	  If unsure, say N.
+
+config SND_SOC_INTEL_HASWELL
+	tristate
+	select SND_SOC_INTEL_CATPT
+
+config SND_SST_ATOM_HIFI2_PLATFORM
+	tristate
+	select SND_SOC_COMPRESS
+
+config SND_SST_ATOM_HIFI2_PLATFORM_PCI
+	tristate "PCI HiFi2 (Merrifield) Platforms"
+	depends on X86 && PCI
+	select SND_SST_ATOM_HIFI2_PLATFORM
+	help
+	  If you have a Intel Merrifield/Edison platform, then
+	  enable this option by saying Y or m. Distros will typically not
+	  enable this option: while Merrifield/Edison can run a mainline
+	  kernel with limited functionality it will require a firmware file
+	  which is not in the standard firmware tree
+
+config SND_SST_ATOM_HIFI2_PLATFORM_ACPI
+	tristate "ACPI HiFi2 (Baytrail, Cherrytrail) Platforms"
+	default ACPI
+	depends on X86 && ACPI && PCI
+	select SND_SST_ATOM_HIFI2_PLATFORM
+	select SND_SOC_ACPI_INTEL_MATCH
+	select SND_INTEL_DSP_CONFIG
+	select IOSF_MBI
+	help
+	  If you have a Intel Baytrail or Cherrytrail platform with an I2S
+	  codec, then enable this option by saying Y or m. This is a
+	  recommended option
+	  This option is mutually exclusive with the SOF support on
+	  Baytrail/Cherrytrail. If you want to enable SOF on
+	  Baytrail/Cherrytrail, you need to deselect this option first.
+
+endif ## SND_SOC_INTEL_SST_TOPLEVEL
+
+if SND_SOC_INTEL_SST_TOPLEVEL || SND_SOC_SOF_INTEL_TOPLEVEL
+
+config SND_SOC_ACPI_INTEL_MATCH
+	tristate
+	select SND_SOC_ACPI if ACPI
+	select SND_SOC_ACPI_INTEL_SDCA_QUIRKS
+	# this option controls the compilation of ACPI matching tables and
+	# helpers and is not meant to be selected by the user.
+
+config SND_SOC_ACPI_INTEL_SDCA_QUIRKS
+	tristate
+	select SND_SOC_SDCA if ACPI
+
+endif ## SND_SOC_INTEL_SST_TOPLEVEL || SND_SOC_SOF_INTEL_TOPLEVEL
+
+config SND_SOC_INTEL_KEEMBAY
+	tristate "Keembay Platforms"
+	depends on ARCH_KEEMBAY || COMPILE_TEST
+	depends on COMMON_CLK
+	select SND_DMAENGINE_PCM
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	help
+	  If you have a Intel Keembay platform then enable this option
+	  by saying Y or m.
+
+config SND_SOC_INTEL_AVS
+	tristate "Intel AVS driver"
+	depends on X86
+	depends on PCI
+	depends on COMMON_CLK
+	select ACPI_NHLT if ACPI
+	select SND_SOC_ACPI if ACPI
+	select SND_SOC_TOPOLOGY
+	select SND_SOC_HDA
+	select SND_SOC_COMPRESS if DEBUG_FS
+	select SND_HDA_EXT_CORE
+	select SND_HDA_DSP_LOADER
+	select SND_INTEL_DSP_CONFIG
+	select WANT_DEV_COREDUMP
+	help
+	  Enable support for Intel(R) cAVS 1.5 platforms with DSP
+	  capabilities. This includes Skylake, Kabylake, Amberlake and
+	  Apollolake.
+
+# Machine board drivers
+source "sound/soc/intel/avs/boards/Kconfig"
+
+# ASoC codec drivers
+source "sound/soc/intel/boards/Kconfig"
+
+endmenu