[lkml]   [2021]   [Feb]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v5] x86/sgx: Fix use-after-free in sgx_mmu_notifier_release()
On 1/30/21 11:20 AM, Jarkko Sakkinen wrote:
> Example scenario would such that all removals "side-channel" through
> the notifier callback. Then mmu_notifier_unregister() gets called
> exactly zero times. No MMU notifier srcu sync would be then happening.
> NOTE: There's bunch of other examples, I'm just giving one.

Could you flesh this out a bit? I don't quite understand the scenario
from what you describe above.

In any case, I'm open to other implementations that fix the race we know
about. If you think you have a better fix, I'm happy to review it and
make sure it closes the other race.

 \ /
  Last update: 2021-02-03 16:49    [W:0.065 / U:2.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site