Description: appletalk: Fix potential NULL pointer dereference in unregister_snap_clien References: Notes: Bugs: upstream: released (5.1-rc3) [9804501fa1228048857910a6bf23e085aade37cc] 4.19-upstream-stable: released (4.19.89) [0977763a13fd87a7aebe376dc96385758de3aa9e] 4.9-upstream-stable: released (4.9.207) [540b341012ba9b8e2963be3241cea229d4e4804d] 3.16-upstream-stable: released (3.16.79) [1551894964c90588b285d3a4f7da516e0ee9025a] sid: released (5.2.6-1) 4.19-buster-security: released (4.19.98-1) 4.9-stretch-security: released (4.9.210-1) 3.16-jessie-security: released (3.16.81-1)