A bug in Android and Microsoft Teams could have caused a 911 call to fail

https://medium.com/@mmrahman123/how-a-bug-in-android-and-microsoft-teams-could-have-caused-this-users-911-call-to-fail-6525f9ba5e63

by farmerbb • 5 years ago

23 5 5 years ago

medium.com

mdp20212• 5 years ago

I presume this is a reference to the facts of the recent huge thread

https://news.ycombinator.com/item?id=29492884

jwoglom• 5 years ago

Yes -- this is a follow-up investigation into how that bug might have occurred by looking at recent commits to AOSP.

LurkersWillLurk• 5 years ago

So basically, an integer overflow causes the whole mess. I wish I could say that I was shocked, but here we are.

mdp20212• 5 years ago

an integer overflow

Yes but I'm not sure that's the point. I see that point being, "a subtraction between hashes was used instead of a comparison". "Hash of value "a lot" minus minus-a-lot" overflows.

And a nonsensical behaviour of the other product created a large number of those hashes... Which represent PhoneAccounts objects. The software that triggered the bug created a new PhoneAccounts at every onResume (or similar)...

fingerlocks• 5 years ago

Actually it was in Application.onCreate

https://katb.in/isiragorucu

Really feels like it’s more of a Google bug than Teams

A bug in Android and Microsoft Teams could have caused a 911 call to fail

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