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 --- arch/arm64/configs/virt.config | 65 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 arch/arm64/configs/virt.config (limited to 'arch/arm64/configs/virt.config') diff --git a/arch/arm64/configs/virt.config b/arch/arm64/configs/virt.config new file mode 100644 index 000000000..2d1d2ce7a --- /dev/null +++ b/arch/arm64/configs/virt.config @@ -0,0 +1,65 @@ +# Help: Virtualization guest +# +# Base options for platforms +# + +# CONFIG_ARCH_ACTIONS is not set +# CONFIG_ARCH_SUNXI is not set +# CONFIG_ARCH_ALPINE is not set +# CONFIG_ARCH_APPLE is not set +# CONFIG_ARCH_BCM is not set +# CONFIG_ARCH_BCM2835 is not set +# CONFIG_ARCH_BCMBCA is not set +# CONFIG_ARCH_BCM_IPROC is not set +# CONFIG_ARCH_BERLIN is not set +# CONFIG_ARCH_BRCMSTB is not set +# CONFIG_ARCH_EXYNOS is not set +# CONFIG_ARCH_SPARX5 is not set +# CONFIG_ARCH_K3 is not set +# CONFIG_ARCH_LAYERSCAPE is not set +# CONFIG_ARCH_LG1K is not set +# CONFIG_ARCH_HISI is not set +# CONFIG_ARCH_KEEMBAY is not set +# CONFIG_ARCH_MEDIATEK is not set +# CONFIG_ARCH_MESON is not set +# CONFIG_ARCH_MVEBU is not set +# CONFIG_ARCH_NXP is not set +# CONFIG_ARCH_MA35 is not set +# CONFIG_ARCH_MXC is not set +# CONFIG_ARCH_NPCM is not set +# CONFIG_ARCH_QCOM is not set +# CONFIG_ARCH_REALTEK is not set +# CONFIG_ARCH_RENESAS is not set +# CONFIG_ARCH_ROCKCHIP is not set +# CONFIG_ARCH_S32 is not set +# CONFIG_ARCH_SEATTLE is not set +# CONFIG_ARCH_INTEL_SOCFPGA is not set +# CONFIG_ARCH_STM32 is not set +# CONFIG_ARCH_SYNQUACER is not set +# CONFIG_ARCH_TEGRA is not set +# CONFIG_ARCH_TESLA_FSD is not set +# CONFIG_ARCH_SPRD is not set +# CONFIG_ARCH_THUNDER is not set +# CONFIG_ARCH_THUNDER2 is not set +# CONFIG_ARCH_UNIPHIER is not set +# CONFIG_ARCH_VEXPRESS is not set +# CONFIG_ARCH_VISCONTI is not set +# CONFIG_ARCH_XGENE is not set +# CONFIG_ARCH_ZYNQMP is not set + +# +# Subsystems which can't be used in mach-virt +# +# CONFIG_CHROME_PLATFORMS is not set +# CONFIG_EXTCON is not set +# CONFIG_IIO is not set +# CONFIG_MTD is not set +# CONFIG_NEW_LEDS is not set +# CONFIG_PWM is not set +# CONFIG_REGULATOR is not set +# CONFIG_SLIMBUS is not set +# CONFIG_SND_SOC is not set +# CONFIG_SOUNDWIRE is not set +# CONFIG_SPI is not set +# CONFIG_SURFACE_PLATFORMS is not set +# CONFIG_THERMAL is not set -- cgit v1.3.1