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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-03-09 23:11:12 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-03-17 09:31:30 -0700 |
| commit | ab676b7d6fbf4b294bf198fb27ade5b0e865c7ce (patch) | |
| tree | 93fdcd656a687ca3fa5f717f9ce078cd8aea6c70 /kernel/utsname_sysctl.c | |
| parent | 06e5801b8cb3fc057d88cb4dc03c0b64b2744cda (diff) | |
| download | linux-ab676b7d6fbf4b294bf198fb27ade5b0e865c7ce.tar.gz linux-ab676b7d6fbf4b294bf198fb27ade5b0e865c7ce.tar.bz2 linux-ab676b7d6fbf4b294bf198fb27ade5b0e865c7ce.zip | |
pagemap: do not leak physical addresses to non-privileged userspace
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>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/utsname_sysctl.c')
0 files changed, 0 insertions, 0 deletions