Worst case scenario ?

Posted Jun 7, 2019 20:50 UTC (Fri) by meuh (guest, #22042)
Parent article: Detecting and handling split locks

What about an unaligned atomic operation across two consecutive unmapped pages, which will be mapped from physical memory belonging to two different NUMA nodes ?

Worst case scenario ?

Posted Jun 7, 2019 20:58 UTC (Fri) by mpr22 (subscriber, #60784) [Link] (2 responses)

At that point I submit that you need to either recruit better programmers or identify the saboteur :)

Worst case scenario ?

Posted Jun 7, 2019 21:24 UTC (Fri) by JoeBuck (subscriber, #2330) [Link] (1 responses)

"Identify the saboteur" ... if this approach can be used deliberately as an attack that could allow unprivileged code in a container to bring the host to its knees.

Worst case scenario ?

Posted Jun 7, 2019 23:41 UTC (Fri) by mpr22 (subscriber, #60784) [Link]

I wasn't even thinking that far, merely as far as "if your software system does this, then something is wrong with it and you should do something about that".