lkml.org 
[lkml]   [2014]   [Feb]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH -v2] x86, microcode, AMD: Sanity-check initrd image
On Mon, Feb 03, 2014 at 02:37:34PM -0500, Boris Ostrovsky wrote:
> It exploded when 'if (!container)' check was done *after* relocation,
> which made container non-zero. If you do the check *before* then I
> think you will catch the fact that container is empty.

Ah, right, this was it.

Ok, just remove the signature check then and give it a try pls:

--
diff --git a/arch/x86/kernel/cpu/microcode/amd_early.c b/arch/x86/kernel/cpu/microcode/amd_early.c
index 41537ae7c31d..362994511be1 100644
--- a/arch/x86/kernel/cpu/microcode/amd_early.c
+++ b/arch/x86/kernel/cpu/microcode/amd_early.c
@@ -37,12 +37,10 @@ static __initdata char ucode_path[] = "kernel/x86/microcode/AuthenticAMD.bin";

static struct cpio_data __init find_ucode_in_initrd(void)
{
- struct cpio_data ret;
long offset = 0;
char *path;
void *start;
size_t size;
- u32 *hdr;

#ifdef CONFIG_X86_32
struct boot_params *p;
@@ -60,21 +58,7 @@ static struct cpio_data __init find_ucode_in_initrd(void)
start = (void *)(boot_params.hdr.ramdisk_image + PAGE_OFFSET);
size = boot_params.hdr.ramdisk_size;
#endif
-
- ret = find_cpio_data(path, start, size, &offset);
- if (!ret.data)
- return ret;
-
- /* Verify we didn't get some garbage from the initrd. */
- hdr = (u32 *)ret.data;
-
- if (hdr[0] != UCODE_MAGIC ||
- hdr[1] != UCODE_EQUIV_CPU_TABLE_TYPE ||
- hdr[2] == 0) {
- ret.data = NULL;
- ret.size = 0;
- }
- return ret;
+ return find_cpio_data(path, start, size, &offset);
}

static size_t compute_container_size(u8 *data, u32 total_size)
--
--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
--


\
 
 \ /
  Last update: 2014-02-03 21:41    [W:0.093 / U:0.148 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site