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/bcm63xx/Kconfig | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 arch/mips/bcm63xx/Kconfig (limited to 'arch/mips/bcm63xx/Kconfig') diff --git a/arch/mips/bcm63xx/Kconfig b/arch/mips/bcm63xx/Kconfig new file mode 100644 index 000000000..837f6e5a2 --- /dev/null +++ b/arch/mips/bcm63xx/Kconfig @@ -0,0 +1,45 @@ +# SPDX-License-Identifier: GPL-2.0 +menu "CPU support" + depends on BCM63XX + +config BCM63XX_CPU_3368 + bool "support 3368 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI + +config BCM63XX_CPU_6328 + bool "support 6328 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI + +config BCM63XX_CPU_6338 + bool "support 6338 CPU" + select SYS_HAS_CPU_BMIPS32_3300 + select HAVE_PCI + +config BCM63XX_CPU_6345 + bool "support 6345 CPU" + select SYS_HAS_CPU_BMIPS32_3300 + +config BCM63XX_CPU_6348 + bool "support 6348 CPU" + select SYS_HAS_CPU_BMIPS32_3300 + select HAVE_PCI + +config BCM63XX_CPU_6358 + bool "support 6358 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI + +config BCM63XX_CPU_6362 + bool "support 6362 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI + +config BCM63XX_CPU_6368 + bool "support 6368 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI +endmenu + +source "arch/mips/bcm63xx/boards/Kconfig" -- cgit v1.3.1