tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Merge tag 'powerpc-5.10-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
"One commit to implement copy_from_kernel_nofault_allowed(), otherwise
copy_from_kernel_nofault() can trigger warnings when accessing bad
addresses in some configurations.

Thanks to Christophe Leroy and Qian Cai"

* tag 'powerpc-5.10-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()

Linus Torvalds 47003b99 197c61cb

+10 -1
+1 -1
arch/powerpc/mm/Makefile
··· 5 5 6 6 ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC) 7 7 8 - obj-y := fault.o mem.o pgtable.o mmap.o \ 8 + obj-y := fault.o mem.o pgtable.o mmap.o maccess.o \ 9 9 init_$(BITS).o pgtable_$(BITS).o \ 10 10 pgtable-frag.o ioremap.o ioremap_$(BITS).o \ 11 11 init-common.o mmu_context.o drmem.o
+9
arch/powerpc/mm/maccess.c
··· 1 + // SPDX-License-Identifier: GPL-2.0-only 2 + 3 + #include <linux/uaccess.h> 4 + #include <linux/kernel.h> 5 + 6 + bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) 7 + { 8 + return is_kernel_addr((unsigned long)unsafe_src); 9 + }