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/mips/cavium-octeon/Makefile | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 arch/mips/cavium-octeon/Makefile (limited to 'arch/mips/cavium-octeon/Makefile') diff --git a/arch/mips/cavium-octeon/Makefile b/arch/mips/cavium-octeon/Makefile new file mode 100644 index 000000000..ab84ede0c --- /dev/null +++ b/arch/mips/cavium-octeon/Makefile @@ -0,0 +1,20 @@ +# +# Makefile for the Cavium Octeon specific kernel interface routines +# under Linux. +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2005-2009 Cavium Networks +# + +obj-y := cpu.o setup.o octeon-platform.o octeon-irq.o csrc-octeon.o +obj-y += dma-octeon.o +obj-y += octeon-crypto.o +obj-y += octeon-memcpy.o +obj-y += executive/ + +obj-$(CONFIG_MTD) += flash_setup.o +obj-$(CONFIG_SMP) += smp.o +obj-$(CONFIG_OCTEON_ILM) += oct_ilm.o -- cgit v1.3.1