Description: btrfs: crafted image causes null deref in btrfs_root_node
References:
 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19036
Notes:
Bugs:
upstream:
4.19-upstream-stable:
4.9-upstream-stable:
3.16-upstream-stable:
sid:
4.19-buster-security:
4.9-stretch-security:
3.16-jessie-security: