Re: [PATCH v3 3/3] powerpc/32: Add KASAN support

[Andrey Ryabinin]

On 1/12/19 2:16 PM, Christophe Leroy wrote:

> +KASAN_SANITIZE_early_32.o := n
> +KASAN_SANITIZE_cputable.o := n
> +KASAN_SANITIZE_prom_init.o := n
> +

Usually it's also good idea to disable branch profiling - define DISABLE_BRANCH_PROFILING
either in top of these files or via Makefile. Branch profiling redefines if() statement and calls
instrumented ftrace_likely_update in every if().



> diff --git a/arch/powerpc/mm/kasan_init.c b/arch/powerpc/mm/kasan_init.c
> new file mode 100644
> index 000000000000..3edc9c2d2f3e

> +void __init kasan_init(void)
> +{
> +	struct memblock_region *reg;
> +
> +	for_each_memblock(memory, reg)
> +		kasan_init_region(reg);
> +
> +	pr_info("KASAN init done\n");

Without "init_task.kasan_depth = 0;" kasan will not repot bugs.

There is test_kasan module. Make sure that it produce reports.