fix(tvix/castore): handle Directory::size overflow explicitly r/6777

We use checked arithmetic for computing the total size, and verify
that size is in-bounds in Directory::validate.

If an out-of-bounds size makes it to the "unchecked" size method,
we either panic (in debug mode), or silently saturate to u32::MAX.

No new panic sites are added, since overflows in debug mode already
panic at the language level.

Change-Id: I95b8c066a42614fa447f08b4f8fe74e16fbe8bf9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9616
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

0 files changed, 0 insertions, 0 deletions