Description: speculative bounds check bypass store (Spectre v1.1)
References:
 https://01.org/security/advisories/intel-oss-10002
 https://access.redhat.com/solutions/3523601
 https://bugzilla.redhat.com/show_bug.cgi?id=1581650
 https://people.csail.mit.edu/vlk/spectre11.pdf
Notes:
 carnil> 3b78ce4a34b761c7fe13520de822984019ff1a8f (4.17-rc7) merges
 carnil> the speculative store buffer bypass fixes (for x86 side).
 bwh> The above merge only addresses only SSB (CVE-2018-3639).
 bwh> This issue (CVE-2018-3693) is closely related to Spectre v1
 bwh> (CVE-2017-5753) and is being mitigated in a similar way, using
 bwh> array_index_nospec().  The same as with Spectre v1, this will
 bwh> be an ongoing process.
Bugs:
upstream: needed
4.19-upstream-stable: needed
4.9-upstream-stable: needed
3.16-upstream-stable: needed
sid: needed
4.19-buster-security: needed
4.9-stretch-security: needed
3.16-jessie-security: needed