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/pic32/Kconfig | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 arch/mips/pic32/Kconfig (limited to 'arch/mips/pic32/Kconfig') diff --git a/arch/mips/pic32/Kconfig b/arch/mips/pic32/Kconfig new file mode 100644 index 000000000..cd14a071e --- /dev/null +++ b/arch/mips/pic32/Kconfig @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: GPL-2.0 +if MACH_PIC32 + +choice + prompt "Machine Type" + +config PIC32MZDA + bool "Microchip PIC32MZDA Platform" + select BOOT_ELF32 + select BOOT_RAW + select CEVT_R4K + select CSRC_R4K + select DMA_NONCOHERENT + select SYS_HAS_CPU_MIPS32_R2 + select SYS_HAS_EARLY_PRINTK + select SYS_SUPPORTS_32BIT_KERNEL + select SYS_SUPPORTS_LITTLE_ENDIAN + select GPIOLIB + select COMMON_CLK + select LIBFDT + select USE_OF + select PINCTRL + help + Support for the Microchip PIC32MZDA microcontroller. + + This is a 32-bit microcontroller with support for external or + internally packaged DDR2 memory up to 128MB. + + For more information, see . + +endchoice + +choice + prompt "Devicetree selection" + default DTB_PIC32_NONE + help + Select the devicetree. + +config DTB_PIC32_NONE + bool "None" + +config DTB_PIC32_MZDA_SK + bool "PIC32MZDA Starter Kit" + depends on PIC32MZDA + select BUILTIN_DTB + +endchoice + +endif # MACH_PIC32 -- cgit v1.3.1