Description: net/x25: Fix null-ptr-deref caused by x25_disconnect
References:
Notes:
 carnil> CONFIG_X25 is not set in Debian.
Bugs:
upstream: released (5.18-rc1) [7781607938c8371d4c2b243527430241c62e39c2]
5.10-upstream-stable: released (5.10.110) [5c94b6205e87411dbe9dc1ca088eb36b8837fb47]
4.19-upstream-stable: released (4.19.238) [4c240c5a105557e4546d0836e694868f22fd09b0]
4.9-upstream-stable: released (4.9.311) [dffc859d1d9560da594e4282091781b8d2715f00]
sid: released (5.17.3-1)
5.10-bullseye-security: released (5.10.113-1)
4.19-buster-security: released (4.19.249-1)
4.9-stretch-security: released (4.9.320-2)