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/interconnect/Kconfig | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 drivers/interconnect/Kconfig (limited to 'drivers/interconnect/Kconfig') diff --git a/drivers/interconnect/Kconfig b/drivers/interconnect/Kconfig new file mode 100644 index 000000000..882dcb0b4 --- /dev/null +++ b/drivers/interconnect/Kconfig @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: GPL-2.0-only +menuconfig INTERCONNECT + bool "On-Chip Interconnect management support" + help + Support for management of the on-chip interconnects. + + This framework is designed to provide a generic interface for + managing the interconnects in a SoC. + + If unsure, say no. + +if INTERCONNECT + +source "drivers/interconnect/imx/Kconfig" +source "drivers/interconnect/mediatek/Kconfig" +source "drivers/interconnect/qcom/Kconfig" +source "drivers/interconnect/samsung/Kconfig" + +config INTERCONNECT_CLK + tristate + depends on COMMON_CLK + help + Support for wrapping clocks into the interconnect nodes. + +config INTERCONNECT_KUNIT_TEST + tristate "KUnit tests for Interconnect framework" + depends on KUNIT + default KUNIT_ALL_TESTS + help + This builds the KUnit test suite for the generic system interconnect + framework. + + The tests cover the core functionality of the interconnect subsystem, + including provider/consumer APIs, topology management, and bandwidth + aggregation logic. + + If unsure, say N. + +endif -- cgit v1.3.1