Description:
References:
 https://source.android.com/security/bulletin/pixel/2022-08-01
 https://android.googlesource.com/kernel/common/+/69e8f03c5ced3e4e6fb4181f4dac185104e3420b
 https://android.googlesource.com/kernel/common/+/80d91b86a199798ee2321a0ab0f09e6e12764678
Notes:
 carnil> The second commit is 0b3ea0926afb ("fs: explicitly unregister
 carnil> per-superblock BDIs") in 5.16-rc1.
 carnil> Is this an Android specific issue? 5.16-rc1 contains as well
 carnil> 702f2d1e3b33 ("mm: don't automatically unregister bdis") as
 carnil> "All BDI users now unregister explicitly" at that point.
Bugs:
upstream:
5.10-upstream-stable:
4.19-upstream-stable:
sid:
5.10-bullseye-security:
4.19-buster-security: