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/sunxi/Kconfig | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 drivers/clk/sunxi/Kconfig (limited to 'drivers/clk/sunxi/Kconfig') diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig new file mode 100644 index 000000000..5e2f92bfe --- /dev/null +++ b/drivers/clk/sunxi/Kconfig @@ -0,0 +1,42 @@ +# SPDX-License-Identifier: GPL-2.0-only +menuconfig CLK_SUNXI + bool "Legacy clock support for Allwinner SoCs" + depends on (ARM && ARCH_SUNXI) || COMPILE_TEST + default (ARM && ARCH_SUNXI) + +if CLK_SUNXI + +config CLK_SUNXI_CLOCKS + bool "Legacy clock drivers" + default ARCH_SUNXI + help + Legacy clock drivers being used on older (A10, A13, A20, + A23, A31, A80) SoCs. These drivers are kept around for + Device Tree backward compatibility issues, in case one would + still use a Device Tree with one clock provider by + node. Newer Device Trees and newer SoCs use the drivers + controlled by CONFIG_SUNXI_CCU. + +config CLK_SUNXI_PRCM_SUN6I + bool "Legacy A31 PRCM driver" + default ARCH_SUNXI + help + Legacy clock driver for the A31 PRCM clocks. Those are + usually needed for the PMIC communication, mostly. + +config CLK_SUNXI_PRCM_SUN8I + bool "Legacy sun8i PRCM driver" + default ARCH_SUNXI + help + Legacy clock driver for the sun8i family PRCM clocks. + Those are usually needed for the PMIC communication, + mostly. + +config CLK_SUNXI_PRCM_SUN9I + bool "Legacy A80 PRCM driver" + default ARCH_SUNXI + help + Legacy clock driver for the A80 PRCM clocks. Those are + usually needed for the PMIC communication, mostly. + +endif -- cgit v1.3.1