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| author |   Andreas Herrmann <andreas.herrmann3@amd.com> | 2012-07-31 15:41:45 +0200 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@linux.intel.com> | 2012-08-22 16:10:41 -0700 |
| commit | 36bf50d7697be18c6bfd0401e037df10bff1e573 (patch) | |
| tree | e32aeb6e6077c3eecc569f9f2ad4f393ba8b63d8 /arch/x86/kernel/microcode_core.c | |
| parent | x86/alternatives: Fix p6 nops on non-modular kernels (diff) | |
| download | linux-dev-36bf50d7697be18c6bfd0401e037df10bff1e573.tar.xz linux-dev-36bf50d7697be18c6bfd0401e037df10bff1e573.zip | |
x86, microcode, AMD: Fix broken ucode patch size check
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.
Cc: <stable@vger.kernel.org> [3.3+]
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>
Diffstat (limited to 'arch/x86/kernel/microcode_core.c')
0 files changed, 0 insertions, 0 deletions