mirror of
https://github.com/fergalmoran/ladybird.git
synced 2025-12-31 05:39:55 +00:00
3dcec260ed
We now validate the full range of userspace memory passed into syscalls instead of just checking that the first and last byte of the memory are in process-owned regions. This fixes an issue where it was possible to avoid rejection of invalid addresses that sat between two valid ones, simply by passing a valid address and a size large enough to put the end of the range at another valid address. I added a little test utility that tries to provoke EFAULT in various ways to help verify this. I'm sure we can think of more ways to test this but it's at least a start. :^) Thanks to mozjag for pointing out that this code was still lacking! Incidentally this also makes backtraces work again. Fixes #989.