Merge branch 'af_unix-fix-gc-and-improve-selftest'

Merge branch 'af_unix-fix-gc-and-improve-selftest'

Michal Luczaj says:

====================
af_unix: Fix GC and improve selftest

Series deals with AF_UNIX garbage collector mishandling some in-flight
graph cycles. Embryos carrying OOB packets with SCM_RIGHTS cause issues.

Patch 1/2 fixes the memory leak.
Patch 2/2 tweaks the selftest for a better OOB coverage.

v3:
  - Patch 1/2: correct the commit message (Kuniyuki)

v2: https://lore.kernel.org/netdev/20240516145457.1206847-1-mhal@rbox.co/
  - Patch 1/2: remove WARN_ON_ONCE() (Kuniyuki)
  - Combine both patches into a series (Kuniyuki)

v1: https://lore.kernel.org/netdev/20240516103049.1132040-1-mhal@rbox.co/
====================

Link: https://lore.kernel.org/r/20240517093138.1436323-1-mhal@rbox.co
Signed-off-by: Paolo Abeni <pabeni@redhat.com>