Description: af_unix: Drop oob_skb ref before purging queue in GC.
References:
Notes:
 carnil> Introduced in 25236c91b5ab ("af_unix: Fix task hung while purging oob_skb in
 carnil> GC."). Vulnerable versions: 5.15.149 6.1.81 6.6.21 6.7.9 6.8-rc5.
Bugs:
upstream: released (6.8-rc6) [aa82ac51d63328714645c827775d64dbfd9941f3]
6.7-upstream-stable: released (6.7.9) [43ba9e331559a30000c862eea313248707afa787]
6.6-upstream-stable: released (6.6.21) [e9eac260369d0cf57ea53df95427125725507a0d]
6.1-upstream-stable: released (6.1.81) [c4c795b21dd23d9514ae1c6646c3fb2c78b5be60]
5.10-upstream-stable: N/A "Vulnerable code not present"
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.7.9-1)
6.1-bookworm-security: released (6.1.82-1)
5.10-bullseye-security: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerable code not present"