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| author | Andreas Herrmann <andreas.herrmann3@amd.com> | 2012-07-31 15:41:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-14 10:00:34 -0700 |
| commit | 72961d91696071841fa013f11f686eaa7e2d0996 (patch) | |
| tree | 31813ab89c9cf0013c067e1525816d271c7ab33f /drivers | |
| parent | bbebafa0d9507206793a05fbeb010eafb1fdb0d0 (diff) | |
| download | linux-3.10-72961d91696071841fa013f11f686eaa7e2d0996.tar.gz linux-3.10-72961d91696071841fa013f11f686eaa7e2d0996.tar.bz2 linux-3.10-72961d91696071841fa013f11f686eaa7e2d0996.zip | |
x86, microcode, AMD: Fix broken ucode patch size check
commit 36bf50d7697be18c6bfd0401e037df10bff1e573 upstream.
This issue was recently observed on an AMD C-50 CPU where a patch of
maximum size was applied.
Commit be62adb49294 ("x86, microcode, AMD: Simplify ucode verification")
added current_size in get_matching_microcode(). This is calculated as
size of the ucode patch + 8 (ie. size of the header). Later this is
compared against the maximum possible ucode patch size for a CPU family.
And of course this fails if the patch has already maximum size.
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Link: http://lkml.kernel.org/r/1344361461-10076-1-git-send-email-bp@amd64.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions