Commit-ID: 4ace2e7a48ab426eaa9745ace4c50c6a7adb3992
Gitweb: http://git.kernel.org/tip/4ace2e7a48ab426eaa9745ace4c50c6a7adb3992
Author: Borislav Petkov <bp@xxxxxxx>
AuthorDate: Mon, 7 Mar 2016 11:10:04 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 8 Mar 2016 09:08:45 +0100
x86/microcode/intel: Drop orig_sum from ext signature checksum
It is 0 because for !0 values we would have exited already.
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Link: http://lkml.kernel.org/r/1457345404-28884-6-git-send-email-bp@xxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/microcode/intel_lib.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/cpu/microcode/intel_lib.c b/arch/x86/kernel/cpu/microcode/intel_lib.c
index 23b1d92..2ce1a7d 100644
--- a/arch/x86/kernel/cpu/microcode/intel_lib.c
+++ b/arch/x86/kernel/cpu/microcode/intel_lib.c
@@ -130,9 +130,9 @@ int microcode_sanity_check(void *mc, int print_err)
for (i = 0; i < ext_sigcount; i++) {
ext_sig = (void *)ext_header + EXT_HEADER_SIZE +
EXT_SIGNATURE_SIZE * i;
- sum = orig_sum
- - (mc_header->sig + mc_header->pf + mc_header->cksum)
- + (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
+
+ sum = (mc_header->sig + mc_header->pf + mc_header->cksum) -
+ (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
if (sum) {
if (print_err)
pr_err("Bad extended signature checksum, aborting.\n");
--
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