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author | Borislav Petkov <bp@suse.de> | 2014-02-03 20:41:44 (GMT) |
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committer | H. Peter Anvin <hpa@zytor.com> | 2014-02-06 19:11:19 (GMT) |
commit | 75a1ba5b2c529db60ca49626bcaf0bddf4548438 (patch) | |
tree | 3b29eb108807f6e86d67d80f37052c4e7cd1a056 /include | |
parent | 6583327c4dd55acbbf2a6f25e775b28b3abf9a42 (diff) | |
download | linux-75a1ba5b2c529db60ca49626bcaf0bddf4548438.tar.xz |
x86, microcode, AMD: Unify valid container checks
For additional coverage, BorisO and friends unknowlingly did swap AMD
microcode with Intel microcode blobs in order to see what happens. What
did happen on 32-bit was
[ 5.722656] BUG: unable to handle kernel paging request at be3a6008
[ 5.722693] IP: [<c106d6b4>] load_microcode_amd+0x24/0x3f0
[ 5.722716] *pdpt = 0000000000000000 *pde = 0000000000000000
because there was a valid initrd there but without valid microcode in it
and the container check happened *after* the relocated ramdisk handling
on 32-bit, which was clearly wrong.
While at it, take care of the ramdisk relocation on both 32- and 64-bit
as it is done on both. Also, comment what we're doing because this code
is a bit tricky.
Reported-and-tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1391460104-7261-1-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions