[lkml]   [2020]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: SECCOMP_IOCTL_NOTIF_ADDFD race condition
On Mon, Nov 30, 2020 at 06:20:09PM -0500, Tycho Andersen wrote:
> Idea 1 sounds best to me, but maybe that's because it's the way I
> originally did the fd support that never landed :)
> But here's an Idea 4: we add a way to remotely close an fd (I don't
> see that the current infra can do this, but perhaps I didn't look hard
> enough), and then when you get ENOENT you have to close the fd. Of
> course, this can't be via seccomp, so maybe it's even more racy.

Or better yet: what if the kernel closed everything it had added via
ADDFD if it didn't get a valid response from the supervisor? Then
everyone gets this bug fixed for free.


 \ /
  Last update: 2020-12-01 13:43    [W:0.108 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site