diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-03-09 23:11:12 +0200 |
|---|---|---|
| committer | Zefan Li <lizefan@huawei.com> | 2015-04-14 17:34:02 +0800 |
| commit | 6a688d1c2effaecd0988c0e2ad784f189206958c (patch) | |
| tree | 238ca2bf868078dd5d8795b2526d67b523c26f95 /drivers/scsi/mpt2sas/mpi/mpi2_raid.h | |
| parent | 3022d3dd56f905d34054a62f569c16d5749e1e85 (diff) | |
pagemap: do not leak physical addresses to non-privileged userspace
commit ab676b7d6fbf4b294bf198fb27ade5b0e865c7ce upstream.
As pointed by recent post[1] on exploiting DRAM physical imperfection,
/proc/PID/pagemap exposes sensitive information which can be used to do
attacks.
This disallows anybody without CAP_SYS_ADMIN to read the pagemap.
[1] http://googleprojectzero.blogspot.com/2015/03/exploiting-dram-rowhammer-bug-to-gain.html
[ Eventually we might want to do anything more finegrained, but for now
this is the simple model. - Linus ]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Seaborn <mseaborn@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Zefan Li <lizefan@huawei.com>
[mancha: Backported to 3.10]
Signed-off-by: mancha security <mancha1@zoho.com>
Diffstat (limited to 'drivers/scsi/mpt2sas/mpi/mpi2_raid.h')
0 files changed, 0 insertions, 0 deletions