On Fri, Mar 16, 2018 at 12:08:04AM +0100, Maciej S. Szmigiero wrote:
> Before loading a CPU equivalence table from a microcode container file we
> need to verify whether this file is actually large enough to contain the
> table of a size indicated in this file.
> If it is not, there is no point of continuing with loading it since
> microcode patches are located after the equivalence table anyway.
>
> This patch adds these checks to the late loader.
>
> Signed-off-by: Maciej S. Szmigiero <[email protected]>
> ---
> arch/x86/kernel/cpu/microcode/amd.c | 32 ++++++++++++++++++++++----------
> 1 file changed, 22 insertions(+), 10 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/microcode/amd.c
> b/arch/x86/kernel/cpu/microcode/amd.c
> index 138c9fb983f2..ed24200cf936 100644
> --- a/arch/x86/kernel/cpu/microcode/amd.c
> +++ b/arch/x86/kernel/cpu/microcode/amd.c
> @@ -551,28 +551,40 @@ static enum ucode_state apply_microcode_amd(int cpu)
> return UCODE_UPDATED;
> }
>
> -static int install_equiv_cpu_table(const u8 *buf)
> +static int install_equiv_cpu_table(const u8 *buf, size_t buf_size)
> {
> unsigned int *ibuf = (unsigned int *)buf;
> - unsigned int type = ibuf[1];
> - unsigned int size = ibuf[2];
> + unsigned int type, equiv_tbl_len;
Ok, as a unification, let's make those u32 too.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply. Srsly.
