1516179 - UAF (read) in mozilla::BackgroundHangAnnotators::GatherAnnotations()

Status: RESOLVED FIXED

(Core :: Performance: General, defect)

Description

[Julian Seward [:jseward]]

I've noticed this several times in the past couple of weeks, when running Fx on Valgrind.  I think it happens when a content process quits, but am not sure.

Comment 1

[Julian Seward [:jseward]]

Attachment: V complainage

Comment 2

[Nika Layzell [:nika] (ni? for response)]

Attachment: Bug 1516179 - Unregister ProcessHangMonitor as a hang annotator on shutdown,

Comment 3

[Andrew McCreight [:mccr8]]

This sounds like some kind of shutdown race so it doesn't sound too severe.

Comment 4

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

https://hg.mozilla.org/integration/autoland/rev/7f9e45f01772c640564c9e488a7ceed477c1f6d3
https://hg.mozilla.org/mozilla-central/rev/7f9e45f01772

Comment 5

[Ryan VanderMeulen [:RyanVM]]

Is this something we should consider backporting or can it ride the trains?

Comment 6

[Nika Layzell [:nika] (ni? for response)]

Should be pretty harmless to backport, but it doesn't seem super bad, so can probably ride the trains.