[PATCH net-next] calipso: hash the cache key, not the option start, in calipso_cache_add()

[patchwork-bot+netdevbpf at kernel.org]

Hello:

This patch was applied to netdev/net-next.git (main)
by Paolo Abeni <pabeni at redhat.com>:

On Wed, 07 Oct 2026 12:25:00 -0300 you wrote:
> calipso_cache_add() stores calipso_ptr + 2 as the cache key, but
> computes entry->hash over calipso_ptr, i.e. starting two bytes earlier
> at the option type and length.  calipso_opt_getattr() looks entries up
> with calipso_cache_check(calipso + 2, calipso[1], ...), which hashes the
> key itself.
> 
> The two hashes only match on a jhash collision, so the CALIPSO label
> cache never hits and every labelled packet takes the full DOI lookup and
> category conversion path.  The memcmp() on the key keeps lookups
> correct, so this is a performance bug only.
> 
> [...]

Here is the summary with links:
  - [net-next] calipso: hash the cache key, not the option start, in calipso_cache_add()
    https://git.kernel.org/netdev/net-next/c/d538cc3ec0bc

You are awesome, thank you!
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