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Message-ID: <20091029134552.GC30802@alberich.amd.com> Date: Thu, 29 Oct 2009 14:45:52 +0100 From: Andreas Herrmann <herrmann.der.user@...glemail.com> To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com> Cc: linux-kernel@...r.kernel.org, Borislav Petkov <borislav.petkov@....com> Subject: [PATCH 1/2] x86, amd-ucode: Check UCODE_MAGIC before loading the container file >From 5183dd763c6dc9f760e29f3313e0ae3dda5228a2 Mon Sep 17 00:00:00 2001 From: Borislav Petkov <borislav.petkov@....com> Date: Thu, 29 Oct 2009 14:00:54 +0100 Subject: [PATCH 1/2] x86, amd-ucode: Check UCODE_MAGIC before loading the container file Signed-off-by: Borislav Petkov <borislav.petkov@....com> Signed-off-by: Andreas Herrmann <andreas.herrmann3@....com> --- arch/x86/kernel/microcode_amd.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c index 366baa1..f4c538b 100644 --- a/arch/x86/kernel/microcode_amd.c +++ b/arch/x86/kernel/microcode_amd.c @@ -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); -- 1.6.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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