Description: NULL pointer dereference in __remove_dirty_segment() when mounting an f2fs image
References:
 https://bugzilla.kernel.org/show_bug.cgi?id=200419
 https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=f2fs-dev&id=bf2d987b270ed14fb205c83c6dcfbfa6dfcd9f8c
Notes:
Bugs:
upstream: released (4.19-rc1) [e494c2f995d6181d6e29c4927d68e0f295ecf75b]
4.19-upstream-stable: N/A "Fixed before branch point"
4.9-upstream-stable: released (4.9.144) [91fe514bedf4c72ae8046fe4cfa98c5e201f6b84]
3.16-upstream-stable: ignored "Hard to backport and low priority outside of Android"
sid: released (4.19.9-1)
4.9-stretch-security: released (4.9.144-1)
3.16-jessie-security: ignored "Hard to backport and low priority outside of Android"