1630550 - Intermittent SUMMARY: AddressSanitizer: SEGV /builds/worker/checkouts/gecko/ipc/glue/MessageChannel.cpp:769:9 in mozilla::ipc::MessageChannel::Clear()

Status: RESOLVED DUPLICATE of bug 1551615

(Core :: Audio/Video: GMP, defect)

Description

[Treeherder Bug Filer]

Filed by: sgiesecke [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=297894985&repo=try
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/B0XuI9PTSWemSffBjdgCPQ/runs/0/artifacts/public/logs/live_backing.log

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This is actually not an access violation but:

MOZ_CRASH("MessageChannel destroyed without being closed.")

Comment 1

[Intermittent Failures Robot]

4 failures in 4528 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 2
• autoland: 2

Platform breakdown:

• linux1804-64-asan: 4

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1630550&startday=2020-04-13&endday=2020-04-19&tree=all

Comment 2

[Intermittent Failures Robot]

30 failures in 5582 pushes (0.005 failures/push) were associated with this bug in the last 7 days.

** This failure happened more than 30 times this week! Resolving this bug is a high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled. **

Repository breakdown:

• autoland: 28
• try: 2

Platform breakdown:

• linux1804-64-asan: 30

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1630550&startday=2020-04-20&endday=2020-04-26&tree=all

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

The priority flag is not set for this bug.
:jld, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 4

[Intermittent Failures Robot]

19 failures in 1127 pushes (0.017 failures/push) were associated with this bug yesterday.

Repository breakdown:

• autoland: 19

Platform breakdown:

• linux1804-64-asan: 19

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1630550&startday=2020-04-30&endday=2020-04-30&tree=all

Comment 5

[Andrew McCreight [:mccr8]]

The failures from yesterday are all in opt-web-platform-tests-e10s-15, and the half dozen I looked at were all in the encrypted-media directory.

It looks like the crashes are happening in ~GMPServiceChild which is being called during shutdown.

Comment 6

[Andrew McCreight [:mccr8]]

It looks ~GMPServiceChild is destroying this hashtable:
nsRefPtrHashtable<nsUint64HashKey, GMPContentParent> mContentParents;

which causes us to call ~GMPContentParent, which destroys a message channel.

If the line numbers match SearchFox, it is crashing on this line:
MOZ_CRASH("MessageChannel destroyed without being closed.");

GMPContentParent isn't refcounted by IPDL, but it is refcounted, and it looks like the last reference is being destroyed before IPDL thinks the actor should have gone away.

Bryce, could you take a look? Thanks.

Comment 7

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

I think this is a dupe (ish) of bug 1551615, which I'm currently trying to clobber. There's a cluster of shutdown issues there, this presentation isn't too bad, but hiding just in case.