I managed to crash the Google Cloud Run sandbox using the Racket web server and now all the engineers are scratching their heads wondering how it happens. “Finding a bug in the sandbox is quite rare nowadays” :rolling_on_the_floor_laughing:

nice!

And slightly annoying until they figure out how to fix it.

Will they tell you what was going on?

yes I work there, and they have me CC’d to the bug :)

:slightly_smiling_face:

there’s some system call which the server tries to perform, which the sandbox denies and aborts the process

what syscall?

The system call is annotated with “this is almost certainly not an actual problem”. Until it is :wink:

Unsupported syscall process_vm_readv

they think it actually isn’t that though

but are not sure what it is without more investigation

I think they really are on it because it is interesting to them that I was able to break it with 6 lines of trivial code :slightly_smiling_face:

that does indeed seem unlikely to be the problem

my guess is continuation capture