Description: refcount leak in llcp_sock_connect()
References:
 https://www.openwall.com/lists/oss-security/2020/11/01/1
Notes:
 bwh> Not sure how far back this goes, but 4.9 seems to have the issue
 bwh> Fix for this introduced CVE-2021-23134.
Bugs:
upstream: released (5.12-rc7) [8a4cd82d62b5ec7e5482333a72b58a4eea4979f0]
5.10-upstream-stable: released (5.10.30) [99b596199e8402055c425ac6abd3b8c3fc047034]
4.19-upstream-stable: released (4.19.187) [c14b50185cd0d5ba6d7a5eb8acf9fbcc3663416d]
4.9-upstream-stable: released (4.9.267) [013b8099064f2dc51e789e54a93edb65e2539792]
sid: released (5.10.38-1)
4.19-buster-security: released (4.19.194-1)
4.9-stretch-security: released (4.9.272-1)