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 --- drivers/clk/versatile/Kconfig | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 drivers/clk/versatile/Kconfig (limited to 'drivers/clk/versatile/Kconfig') diff --git a/drivers/clk/versatile/Kconfig b/drivers/clk/versatile/Kconfig new file mode 100644 index 000000000..403f16495 --- /dev/null +++ b/drivers/clk/versatile/Kconfig @@ -0,0 +1,32 @@ +# SPDX-License-Identifier: GPL-2.0-only + +menu "Clock driver for ARM Reference designs" + depends on HAS_IOMEM + depends on ARM || ARM64 || COMPILE_TEST + +config CLK_ICST + bool "Clock driver for ARM Reference designs ICST" + select REGMAP_MMIO + help + Supports clocking on ARM Reference designs: + - Integrator/AP and Integrator/CP + - RealView PB1176, EB, PB11MP and PBX + +config CLK_SP810 + bool "Clock driver for ARM SP810 System Controller" + default y if (ARCH_VEXPRESS && ARM) + help + Supports clock muxing (REFCLK/TIMCLK to TIMERCLKEN0-3) capabilities + of the ARM SP810 System Controller cell. + +config CLK_VEXPRESS_OSC + tristate "Clock driver for Versatile Express OSC clock generators" + depends on VEXPRESS_CONFIG + select REGMAP_MMIO + default y if ARCH_VEXPRESS + help + Simple regmap-based driver driving clock generators on Versatile + Express platforms hidden behind its configuration infrastructure, + commonly known as OSCs. + +endmenu -- cgit v1.3.1