[kernel-hardening] Re: [PATCH v2 11/11] MIPS: KASLR: Print relocation Information on boot

Sergei Shtylyov
2016-03-31T12:38:10Z

Hello.

On 3/31/2016 12:05 PM, Matt Redfearn wrote:

> When debugging a relocated kernel, the addresses of the relocated
> symbols and the offset applied is essential information. If the kernel
> is compiled with debugging information, then print this information
> during bootup using the same function as the panic notifer.

Notifier.

> Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
> ---
>
> Changes in v2: None
>
> arch/mips/kernel/setup.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
> index d8376d7b3345..ae71f8d9b555 100644
> --- a/arch/mips/kernel/setup.c
> +++ b/arch/mips/kernel/setup.c
> @@ -477,9 +477,18 @@ static void __init bootmem_init(void)
> */
> if (__pa_symbol(_text) > __pa_symbol(VMLINUX_LOAD_ADDRESS)) {
> unsigned long offset;
> + extern void show_kernel_relocation(const char *level);
>
> offset = __pa_symbol(_text) - __pa_symbol(VMLINUX_LOAD_ADDRESS);
> free_bootmem(__pa_symbol(VMLINUX_LOAD_ADDRESS), offset);
> +
> +#if (defined CONFIG_DEBUG_KERNEL) && (defined CONFIG_DEBUG_INFO)

Not #if defined(CONFIG_DEBUG_KERNEL) && defined(CONFIG_DEBUG_INFO)?

[...]

MBR, Sergei