Description: jfs: prevent NULL deref in diFree
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2126423
Notes:
Bugs:
upstream: released (5.18-rc1) [a53046291020ec41e09181396c1e829287b48d47]
5.10-upstream-stable: released (5.10.111) [b9c5ac0a15f24d63b20f899072fa6dd8c93af136]
4.19-upstream-stable: released (4.19.238) [2ef74e3e0089b6615ee124e1183746974c6bb561]
sid: released (5.17.3-1)
5.10-bullseye-security: released (5.10.113-1)
4.19-buster-security: released (4.19.249-1)