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x86, amd-ucode: Check UCODE_MAGIC before loading the container file

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Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20091029134552.GC30802@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Borislav Petkov 2009-10-29 14:45:52 +01:00 committed by Ingo Molnar
parent de2a47cf2b
commit 506f90eeae
1 changed files with 6 additions and 0 deletions
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6
arch/x86/kernel/microcode_amd.c
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@ -317,6 +317,12 @@ static enum ucode_state request_microcode_fw(int cpu, struct device *device)
return UCODE_NFOUND;
}
if (*(u32 *)firmware->data != UCODE_MAGIC) {
printk(KERN_ERR "microcode: invalid UCODE_MAGIC (0x%08x)\n",
*(u32 *)firmware->data);
return UCODE_ERROR;
}
ret = generic_load_microcode(cpu, firmware->data, firmware->size);
release_firmware(firmware);