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/mm/Makefile | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 arch/mips/mm/Makefile (limited to 'arch/mips/mm/Makefile') diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile new file mode 100644 index 000000000..304692391 --- /dev/null +++ b/arch/mips/mm/Makefile @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux/MIPS-specific parts of the memory manager. +# + +obj-y += cache.o +obj-y += context.o +obj-y += extable.o +obj-y += fault.o +obj-y += init.o +obj-y += mmap.o +obj-y += page.o +obj-y += page-funcs.o +obj-y += pgtable.o +obj-y += tlbex.o +obj-y += tlbex-fault.o +obj-y += tlb-funcs.o + +ifdef CONFIG_CPU_MICROMIPS +obj-y += uasm-micromips.o +else +obj-y += uasm-mips.o +endif + +ifndef CONFIG_EVA +obj-y += maccess.o +endif + +obj-$(CONFIG_32BIT) += ioremap.o pgtable-32.o +obj-$(CONFIG_64BIT) += ioremap64.o pgtable-64.o +obj-$(CONFIG_HIGHMEM) += highmem.o +obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o +obj-$(CONFIG_DMA_NONCOHERENT) += dma-noncoherent.o + +obj-$(CONFIG_CPU_R3K_TLB) += tlb-r3k.o +obj-$(CONFIG_CPU_R4K_CACHE_TLB) += c-r4k.o cex-gen.o tlb-r4k.o +obj-$(CONFIG_CPU_R3000) += c-r3k.o +obj-$(CONFIG_CPU_SB1) += c-r4k.o cerr-sb1.o cex-sb1.o tlb-r4k.o +obj-$(CONFIG_CPU_CAVIUM_OCTEON) += c-octeon.o cex-oct.o tlb-r4k.o + +obj-$(CONFIG_IP22_CPU_SCACHE) += sc-ip22.o +obj-$(CONFIG_R5000_CPU_SCACHE) += sc-r5k.o +obj-$(CONFIG_RM7000_CPU_SCACHE) += sc-rm7k.o +obj-$(CONFIG_MIPS_CPU_SCACHE) += sc-mips.o +obj-$(CONFIG_SCACHE_DEBUGFS) += sc-debugfs.o + +obj-$(CONFIG_DEBUG_VIRTUAL) += physaddr.o -- cgit v1.3.1