diff options
| author | Liu Hua <sdu.liu@huawei.com> | 2019-07-09 22:20:45 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-07-09 22:21:56 -0700 |
| commit | 7581e84cb6b709019c51a1e7d86414f696470554 (patch) | |
| tree | 3d3f83615896429df1a0dd52b6d271518d2b2bf6 /test/syscalls/linux/sysret.cc | |
| parent | 7965b1272bb0579da47960e64ea902c74f49483d (diff) | |
tss: block userspace access to all I/O ports.
A userspace process (CPL=3) can access an i/o port if the bit corresponding to
the port is set to 0 in the I/O permission bitmap.
Configure the I/O permission bitmap address beyond the last valid byte in the
TSS so access to all i/o ports is blocked.
Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Change-Id: I3df76980c3735491db768f7210e71703f86bb989
PiperOrigin-RevId: 257336518
Diffstat (limited to 'test/syscalls/linux/sysret.cc')
0 files changed, 0 insertions, 0 deletions