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Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, microcode, AMD: Fix section header size check
  x86, microcode, AMD: Correct buf references
This commit is contained in:
Linus Torvalds 2011-07-22 17:03:52 -07:00
commit 80775068db
1 changed files with 11 additions and 10 deletions
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21
arch/x86/kernel/microcode_amd.c
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@ -66,8 +66,8 @@ struct microcode_amd {
unsigned int mpb[0];
};
#define UCODE_CONTAINER_SECTION_HDR 8
#define UCODE_CONTAINER_HEADER_SIZE 12
#define SECTION_HDR_SIZE 8
#define CONTAINER_HDR_SZ 12
static struct equiv_cpu_entry *equiv_cpu_table;
@ -157,7 +157,7 @@ static int apply_microcode_amd(int cpu)
static unsigned int verify_ucode_size(int cpu, const u8 *buf, unsigned int size)
{
struct cpuinfo_x86 *c = &cpu_data(cpu);
unsigned int max_size, actual_size;
u32 max_size, actual_size;
#define F1XH_MPB_MAX_SIZE 2048
#define F14H_MPB_MAX_SIZE 1824
@ -175,9 +175,9 @@ static unsigned int verify_ucode_size(int cpu, const u8 *buf, unsigned int size)
break;
}
actual_size = buf[4] + (buf[5] << 8);
actual_size = *(u32 *)(buf + 4);
if (actual_size > size || actual_size > max_size) {
if (actual_size + SECTION_HDR_SIZE > size || actual_size > max_size) {
pr_err("section size mismatch\n");
return 0;
}
@ -191,7 +191,7 @@ get_next_ucode(int cpu, const u8 *buf, unsigned int size, unsigned int *mc_size)
struct microcode_header_amd *mc = NULL;
unsigned int actual_size = 0;
if (buf[0] != UCODE_UCODE_TYPE) {
if (*(u32 *)buf != UCODE_UCODE_TYPE) {
pr_err("invalid type field in container file section header\n");
goto out;
}
@ -204,8 +204,8 @@ get_next_ucode(int cpu, const u8 *buf, unsigned int size, unsigned int *mc_size)
if (!mc)
goto out;
get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR, actual_size);
*mc_size = actual_size + UCODE_CONTAINER_SECTION_HDR;
get_ucode_data(mc, buf + SECTION_HDR_SIZE, actual_size);
*mc_size = actual_size + SECTION_HDR_SIZE;
out:
return mc;
@ -229,9 +229,10 @@ static int install_equiv_cpu_table(const u8 *buf)
return -ENOMEM;
}
get_ucode_data(equiv_cpu_table, buf + UCODE_CONTAINER_HEADER_SIZE, size);
get_ucode_data(equiv_cpu_table, buf + CONTAINER_HDR_SZ, size);
return size + UCODE_CONTAINER_HEADER_SIZE; /* add header length */
/* add header length */
return size + CONTAINER_HDR_SZ;
}
static void free_equiv_cpu_table(void)