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, 188 insertions, 0 deletions

diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig
new file mode 100644
index 000000000..9f4f1f4ac
--- /dev/null
+++ b/sound/soc/amd/Kconfig
@@ -0,0 +1,188 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menu "AMD"
+
+config SND_SOC_AMD_ACP
+	tristate "AMD Audio Coprocessor support"
+	help
+	 This option enables ACP DMA support on AMD platform.
+
+config SND_SOC_AMD_CZ_DA7219MX98357_MACH
+	tristate "AMD CZ support for DA7219, RT5682 and MAX9835"
+	select SND_SOC_DA7219
+	select SND_SOC_RT5682_I2C
+	select SND_SOC_MAX98357A
+	select SND_SOC_ADAU7002
+	select REGULATOR
+	depends on SND_SOC_AMD_ACP && I2C && GPIOLIB && ACPI
+	help
+	 This option enables machine driver for DA7219, RT5682 and MAX9835.
+
+config SND_SOC_AMD_CZ_RT5645_MACH
+	tristate "AMD CZ support for RT5645"
+	select SND_SOC_RT5645
+	depends on SND_SOC_AMD_ACP && I2C
+	help
+	 This option enables machine driver for rt5645.
+
+config SND_SOC_AMD_ST_ES8336_MACH
+	tristate "AMD ST support for ES8336"
+	select SND_SOC_ACPI if ACPI
+	select SND_SOC_ES8316
+	depends on SND_SOC_AMD_ACP && ACPI
+	depends on I2C
+	help
+	 This option enables machine driver for Jadeite platform
+	 using es8336 codec.
+	 Say m if you have such a device.
+	 If unsure select "N".
+
+config SND_SOC_AMD_ACP3x
+	tristate "AMD Audio Coprocessor-v3.x support"
+	depends on X86 && PCI
+	help
+	 This option enables ACP v3.x I2S support on AMD platform
+
+config SND_SOC_AMD_RV_RT5682_MACH
+	tristate "AMD RV support for RT5682"
+	select SND_SOC_RT5682_I2C
+	select SND_SOC_MAX98357A
+	select SND_SOC_CROS_EC_CODEC
+	select I2C_CROS_EC_TUNNEL
+	select SND_SOC_RT1015
+	select SND_SOC_RT1015P
+	depends on SND_SOC_AMD_ACP3x && I2C && CROS_EC && GPIOLIB
+	help
+	 This option enables machine driver for RT5682 and MAX9835.
+
+config SND_SOC_AMD_RENOIR
+	tristate "AMD Audio Coprocessor - Renoir support"
+	select SND_AMD_ACP_CONFIG
+	depends on X86 && PCI
+	help
+	 This option enables ACP support for Renoir platform
+
+config SND_SOC_AMD_RENOIR_MACH
+	tristate "AMD Renoir support for DMIC"
+	select SND_SOC_DMIC
+	depends on SND_SOC_AMD_RENOIR && GPIOLIB
+	help
+	 This option enables machine driver for DMIC
+
+config SND_SOC_AMD_ACP5x
+	tristate "AMD Audio Coprocessor-v5.x I2S support"
+	depends on X86 && PCI
+	select SND_AMD_ACP_CONFIG
+	help
+	 This option enables ACP v5.x support on AMD platform
+
+	 By enabling this flag build will trigger for ACP PCI driver,
+	 ACP DMA driver, CPU DAI driver.
+
+config SND_SOC_AMD_VANGOGH_MACH
+	tristate "AMD Vangogh support for NAU8821/CS35L41/MAX98388"
+	select SND_SOC_NAU8821
+	select SND_SOC_CS35L41_SPI
+	select SND_SOC_MAX98388
+	select SND_AMD_ACP_CONFIG
+	depends on SND_SOC_AMD_ACP5x && I2C && SPI_MASTER
+	help
+	  This option enables machine driver for Vangogh platform
+	  using NAU8821 and either CS35L41 or MAX98388 codecs.
+	  Say m if you have such a device.
+	  If unsure select "N".
+
+config SND_SOC_AMD_ACP6x
+	tristate "AMD Audio Coprocessor-v6.x Yellow Carp support"
+	select SND_AMD_ACP_CONFIG
+	depends on X86 && PCI
+	help
+	  This option enables Audio Coprocessor i.e ACP v6.x support on
+	  AMD Yellow Carp platform. By enabling this flag build will be
+	  triggered for ACP PCI driver, ACP PDM DMA driver.
+	  Say m if you have such a device.
+	  If unsure select "N".
+
+config SND_SOC_AMD_YC_MACH
+	tristate "AMD YC support for DMIC"
+	select SND_SOC_DMIC
+	depends on SND_SOC_AMD_ACP6x && ACPI
+	help
+	  This option enables machine driver for Yellow Carp platform
+	  using dmic. ACP IP has PDM Decoder block with DMA controller.
+	  DMIC can be connected directly to ACP IP.
+	  Say m if you have such a device.
+	  If unsure select "N".
+
+config SND_AMD_ACP_CONFIG
+	tristate "AMD ACP configuration selection"
+	select SND_SOC_ACPI if ACPI
+	help
+	 This option adds an auto detection to determine which ACP
+	 driver modules to use
+
+source "sound/soc/amd/acp/Kconfig"
+
+config SND_SOC_AMD_ACP63_TOPLEVEL
+	tristate "support for AMD platforms with ACP version >= 6.3"
+	default SND_AMD_ACP_CONFIG
+	depends on SND_AMD_ACP_CONFIG
+	depends on SOUNDWIRE_AMD || !SOUNDWIRE_AMD
+	depends on X86 || COMPILE_TEST
+	help
+	  This adds support for AMD platforms with ACP version >= 6.3.
+	  Say Y if you have such a device.
+	  If unsure select "N".
+
+if SND_SOC_AMD_ACP63_TOPLEVEL
+
+config SND_SOC_AMD_SOUNDWIRE_LINK_BASELINE
+	tristate
+	select SND_AMD_SOUNDWIRE_ACPI if ACPI
+
+config SND_SOC_AMD_SOUNDWIRE
+	tristate "Support for SoundWire based AMD platforms"
+	default SND_SOC_AMD_SOUNDWIRE_LINK_BASELINE
+	depends on SND_SOC_AMD_SOUNDWIRE_LINK_BASELINE
+	depends on ACPI
+	depends on SOUNDWIRE_AMD
+	help
+	  This adds support for SoundWire for AMD platforms.
+	  Say Y if you want to enable SoundWire links with SOF.
+	  If unsure select "N".
+
+config SND_SOC_AMD_PS
+        tristate "AMD Audio Coprocessor-v6.3/v7.0/v7.1 support"
+	select SND_SOC_AMD_SOUNDWIRE_LINK_BASELINE
+	select SND_SOC_ACPI_AMD_MATCH
+        depends on X86 && PCI && ACPI
+        help
+	  This option enables Audio Coprocessor i.e ACP6.3/ACP7.0/ACP7.1
+	  variants support. By enabling this flag build will be triggered
+	  for ACP PCI driver, ACP PDM DMA driver, ACP SoundWire DMA
+	  driver.
+          Say m if you have such a device.
+          If unsure select "N".
+
+config SND_SOC_AMD_PS_MACH
+        tristate "AMD PINK SARDINE support for DMIC"
+        select SND_SOC_DMIC
+        depends on SND_SOC_AMD_PS
+        help
+          This option enables machine driver for Pink Sardine platform
+          using dmic. ACP IP has PDM Decoder block with DMA controller.
+          DMIC can be connected directly to ACP IP.
+          Say m if you have such a device.
+          If unsure select "N".
+
+config SND_SOC_AMD_ACP7X
+        tristate "AMD Audio Coprocessor-v7.x support"
+        depends on X86 && PCI && ACPI
+        help
+	  This option enables Audio Coprocessor i.e ACP7.x
+	  variants support(ACP7.D/7.E/7.F). By enabling this flag build
+	  will be triggered for ACP PCI driver.
+	  Say m if you have such a device.
+	  If unsure select "N".
+
+endif
+endmenu