From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock 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 Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- sound/Makefile | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 sound/Makefile (limited to 'sound/Makefile') diff --git a/sound/Makefile b/sound/Makefile new file mode 100644 index 000000000..5942311a4 --- /dev/null +++ b/sound/Makefile @@ -0,0 +1,20 @@ +# SPDX-License-Identifier: GPL-2.0 +# Makefile for the Linux sound card driver +# + +obj-$(CONFIG_SOUND) += soundcore.o +obj-$(CONFIG_DMASOUND) += oss/dmasound/ +obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \ + firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ hda/ x86/ xen/ \ + virtio/ +obj-$(CONFIG_SND_AOA) += aoa/ + +# This one must be compilable even if sound is configured out +obj-$(CONFIG_AC97_BUS) += ac97_bus.o +obj-$(CONFIG_AC97_BUS_NEW) += ac97/ + +ifeq ($(CONFIG_SND),y) + obj-y += last.o +endif + +soundcore-y := sound_core.o -- cgit v1.3.1