magisk/docs/releases/22100.md

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## 2021.4.9 Magisk v22.1
This release is focused on fixing regressions and bugs. Check the [v22.0 release notes](https://topjohnwu.github.io/Magisk/releases/22000.html) if coming from older releases.
Note: Magisk v22 is the last major version to support Jellybean and Kitkat. Magisk v23 will only support Android 5.0 and higher.
### Bug Fixes
- [App] Prevent multiple installation sessions running in parallel
- [App] Prevent OutOfMemory crashes when checking boot signature on PXA boot images
- [General] Proper cgroup migration implementation
- [General] Rewrite log writer from scratch, should resolve any crashes and deadlocks
- [General] Many scripts updates fixing regressions
- [MagiskHide] Prevent possible deadlock when signal arrives
- [MagiskHide] Partial match process names if necessary
- [MagiskBoot] Preserve and patch AVB 2.0 structures/headers in boot images
- [MagiskBoot] Properly strip out data encryption flags
- [MagiskBoot] Prevent possible integer overflow
- [MagiskInit] Fix `sepolicy.rule` mounting strategy
- [resetprop] Always delete existing `ro.` props before updating. This will fix bootloops that could be caused by modifying device fingerprint properties.
### Full Changelog: [here](https://topjohnwu.github.io/Magisk/changes.html)