diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2018-02-07 22:34:24 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-02-08 15:24:12 -0500 |
| commit | 3968523f855050b8195134da951b87c20bd66130 (patch) | |
| tree | 1bf66a780a1e70748dcbd036281015a1d510c564 /net/sched/cls_u32.c | |
| parent | ebeeb1ad9b8adcc37c2ec21a96f39e9d35199b46 (diff) | |
mpls, nospec: Sanitize array index in mpls_label_ok()
mpls_label_ok() validates that the 'platform_label' array index from a
userspace netlink message payload is valid. Under speculation the
mpls_label_ok() result may not resolve in the CPU pipeline until after
the index is used to access an array element. Sanitize the index to zero
to prevent userspace-controlled arbitrary out-of-bounds speculation, a
precursor for a speculative execution side channel vulnerability.
Cc: <stable@vger.kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_u32.c')
0 files changed, 0 insertions, 0 deletions