1372085 - Freezing browser via notifications API

Status: NEW

(Core :: DOM: Core & HTML, defect, P2)

Description

[Crivineanu Raul Mircea]

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/51.0.2704.106 Chrome/51.0.2704.106 Safari/537.36
Firefox for Android

Steps to reproduce:

As a developer, by implementing the following JavaScript code in a page, a client's browser will be freezed instantly when opening that page. Simple solution: wait for an answer from the pop-up "ask for permission notification", if answer is "false" then re-enter while loop.

while(Notification.permission !== "granted") Notification.requestPermission();


Actual results:

Browser freezed instantly when opening a page containing that code


Expected results:

Press "allow button" - ok, nothing happens any more
Press "do not allow button" / "cancel" / "X" - re-enter while loop and pop-up appears again

Comment 1

[Andrew McCreight [:mccr8]]

William, can you take a look?

Comment 2

[Blake Kaplan (:mrbkap) (inactive)]

With a bunch of patience, we actually do recover from this. I think we can do better though. I have a patch that fixes things for Notification, but we have a similar problem with geolocation and presumably persistent storage. In the case of geolocation, I was able to dismiss prompt but then content shutdown took too long and I had to kill it, presumably because we were leaking permission request objects. I'll see if I can generalize my patch to fix all of the permission request types at the same time.

Comment 4

[Johann Hofmann [:johannh]]

(In reply to Blake Kaplan (:mrbkap) from comment #2)
> With a bunch of patience, we actually do recover from this. I think we can
> do better though. I have a patch that fixes things for Notification, but we
> have a similar problem with geolocation and presumably persistent storage.
> In the case of geolocation, I was able to dismiss prompt but then content
> shutdown took too long and I had to kill it, presumably because we were
> leaking permission request objects. I'll see if I can generalize my patch to
> fix all of the permission request types at the same time.

In case you got bogged down by other issues, would you mind posting a WIP so that whoever is interested could try to complete the bug? I wouldn't have time to do it at this point either, I just came across the bug again and figured that would be good. :)

Thanks!

Comment 5

[Blake Kaplan (:mrbkap) (inactive)]

Attachment: Bug 1372085 - Cache notification permission requests on the window.

Review commit: https://reviewboard.mozilla.org/r/252442/diff/#index_header
See other reviews: https://reviewboard.mozilla.org/r/252442/

Comment 6

[Blake Kaplan (:mrbkap) (inactive)]

The patch is what I had at the time. It would need to be generalized, but I was also wondering if it could be done entirely in JS instead of C++ (on the frontend side of things).

Comment 7

[hef]

It's back. The behavior is a little different but the repro is the same.

firefox 77.0.1 (64-bit) on osx.

Now it doesn't crash or freeze firefox right away. I get prompted to stop a slow page. When I press stop, pages get kind weird, new pages stop loading. Tabs are able to switch but stop responding. Eventually firefox appears to crash anyway.