[MC-220698] The ExplosionPower of ghast fireballs is uncapped, causing a freeze / crash

Fireballs, unlike creepers, don't appear to have a cap of ExplosionPower. Exploding the fireball with the ExplosionPower of any huge number below integer limit (example: 999999999) will make the game freeze trying to calculate the explosion. Mobs will not move, chunks stop loading, saving the world doesn't work.

The bug

1) /summon fireball ~ ~ ~ {ExplosionPower:999999999}

2) Make it fly into the ground by punching it

3) Game freezes

Attachments

crash-2021-03-24_14.02.56-server.txt

Comments 3

migrated 2021-03-24T17:10:01Z

Can confirm and relates to ~~MC-202760.~~

migrated 2021-04-14T12:59:23Z

this fireball 's power exceeds limit game can take overall, not to mention the amount of block states changed, item drops, and entity kills. so naturally, this would occur. a power 999999999 fireball is a very unsafe way to crash your system.

migrated 2021-06-01T16:09:11Z

I don't see how this matters, all you have to do to avert this is not do something that would obviously crash your game. If we're talking about people exploiting this to crash creative servers, it can be fixed easily with plugins/rollbacks.