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[RFC,0/4] netlink: binary attribute range validation

Message ID 20200805140324.72855-1-johannes@sipsolutions.net
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Series netlink: binary attribute range validation | expand

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Johannes Berg Aug. 5, 2020, 2:03 p.m. UTC 
Hi,

This is something I'd been thinking about for a while; we already
have NLA_MIN_LEN, NLA_BINARY (with a max len), and NLA_EXACT_LEN,
but in quite a few places (as you can see in the last patch here)
we need a range, and we already have a way to encode ranges for
integer ranges, so it's pretty easy to use that for binary length
ranges as well.

So at least for wireless this seems useful to save some code, and
to (mostly) expose the actual limits to userspace via the policy
export that we have now.

What do you think?

johannes