Dave Cottlehuber
2018-Oct-08 09:21 UTC
[FreeBSD-Announce] FreeBSD Errata Notice FreeBSD-EN-18:08.lazyfpu
On Fri, 14 Sep 2018, at 09:39, Dave Cottlehuber wrote:> On Wed, 12 Sep 2018, at 07:43, FreeBSD Errata Notices wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA512 > > > > ============================================================================> > FreeBSD-EN-18:08.lazyfpu Errata Notice > > The FreeBSD Project > > > > Topic: LazyFPU remediation causes potential data corruption > > Data Corruption reads a bit like "Imminent SuperNova in Your Area".. I'm > not really sure what it means for users & sysadmins. Given we've had the > original lazyfpu patches out for 11.x for a few months[1]: > > - what might data corruption entail? > - has this been observed in the wild? > > Many thanks for the efforts into making these patches available. > Dave > > [1]: https://www.freebsd.org/security/advisories/FreeBSD-SA-18:07.lazyfpu.ascHi secteam, can you shed any light on the above? Thanks Dave
Konstantin Belousov
2018-Oct-09 20:36 UTC
[FreeBSD-Announce] FreeBSD Errata Notice FreeBSD-EN-18:08.lazyfpu
On Mon, Oct 08, 2018 at 11:21:11AM +0200, Dave Cottlehuber wrote:> On Fri, 14 Sep 2018, at 09:39, Dave Cottlehuber wrote: > > On Wed, 12 Sep 2018, at 07:43, FreeBSD Errata Notices wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > > > Hash: SHA512 > > > > > > ============================================================================> > > FreeBSD-EN-18:08.lazyfpu Errata Notice > > > The FreeBSD Project > > > > > > Topic: LazyFPU remediation causes potential data corruption > > > > Data Corruption reads a bit like "Imminent SuperNova in Your Area".. I'm > > not really sure what it means for users & sysadmins. Given we've had the > > original lazyfpu patches out for 11.x for a few months[1]: > > > > - what might data corruption entail?The FPU registers can be corrupted. This was observed so far only on the in-kernel FPU consumer, i.e. aesni.ko.> > - has this been observed in the wild?Yes, see above.> > > > Many thanks for the efforts into making these patches available. > > Dave > > > > [1]: https://www.freebsd.org/security/advisories/FreeBSD-SA-18:07.lazyfpu.asc > > Hi secteam, can you shed any light on the above? > > Thanks > Dave > _______________________________________________ > freebsd-security at freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-security > To unsubscribe, send any mail to "freebsd-security-unsubscribe at freebsd.org"