Description: Null pointer dereference and use-after-free in ax25_release()
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2070694
 https://www.openwall.com/lists/oss-security/2022/04/02/5
Notes:
Bugs:
upstream: released (5.17-rc3) [4e0f718daf97d47cf7dec122da1be970f145c809], released (5.17-rc4) [7ec02f5ac8a5be5a3f20611731243dc5e1d9ba10], released (5.17-rc8) [71171ac8eb34ce7fe6b3267dce27c313ab3cb3ac]
5.10-upstream-stable: released (5.10.102) [b9a229fd48bfa45edb954c75a57e3931a3da6c5f], released (5.10.106) [e2201ef32f933944ee02e59205adb566bafcdf91], released (5.10.112) [145ea8d213e8f46667cd904ae79d17f298750f00]
4.19-upstream-stable: released (4.19.231) [3072e72814de56f3c674650a8af98233ddf78b19], released (4.19.235) [5ab8de9377edde3eaf1de9872e2f01d43157cd6c], released (4.19.240) [cb18d72179bf42a6ccd2b311739017b0ba9bc26e]
4.9-upstream-stable: released (4.9.303) [851901d339b2ba766ffcf754d37a6f52fa07cea2], released (4.9.307) [cad71f1094834eb69f7ceec8100d300c26b43053]
sid: released (5.16.18-1)
5.10-bullseye-security: released (5.10.106-1), released (5.10.113-1)
4.19-buster-security: released (4.19.235-1), released (4.19.249-1)
4.9-stretch-security: released (4.9.320-2)