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/arc/plat-hsdk/Kconfig | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 arch/arc/plat-hsdk/Kconfig (limited to 'arch/arc/plat-hsdk/Kconfig') diff --git a/arch/arc/plat-hsdk/Kconfig b/arch/arc/plat-hsdk/Kconfig new file mode 100644 index 000000000..a2d10c29f --- /dev/null +++ b/arch/arc/plat-hsdk/Kconfig @@ -0,0 +1,14 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Copyright (C) 2017 Synopsys, Inc. (www.synopsys.com) +# + +menuconfig ARC_SOC_HSDK + bool "ARC HS Development Kit SOC" + depends on ISA_ARCV2 + select ARC_HAS_ACCL_REGS + select ARC_IRQ_NO_AUTOSAVE + select ARC_FPU_SAVE_RESTORE + select CLK_HSDK + select RESET_CONTROLLER + select RESET_HSDK + select HAVE_PCI -- cgit v1.3.1