Samsung Galaxy Note 4 SM-N910H: Magisk Installation Log Analysis

This document analyzes the Magisk installation log for a Samsung Galaxy Note 4 (SM-N910H) running Android 7.1.1 Nougat. The analysis focuses on identifying potential issues and understanding the Magisk patching process.

**Initial Setup:**
The device platform is listed as armeabi-v7a. Magisk version b1dc47a0 (29001) is being installed.

**Boot Image Processing:**
- The log highlights that Magisk detected a patched boot image.
- The boot image is parsed, and necessary elements like kernel, ramdisk, and extra data are extracted.
- The log shows attempts to extract files from the boot image, including '.backup', 'init.xz', and 'overlay*'. These files are modified during the patching process.

**Magisk Patching Process:**
- The log indicates the patching process, including modification of files within the ramdisk, such as adding or replacing files like 'magisk.xz', 'stub.xz', and 'init-ld.xz'.
- 'resetprop' is used to modify the device's property values.
- Files are added to the 'overlay.d' directory, which is a crucial part of the Magisk patching mechanism.

**Error Detected:**

- An error message "[boot/patch.rs:111] mmap 'kernel': Invalid argument (os error 22)" appears three times during the patching process. This suggests potential issues with accessing or manipulating the kernel memory.

**Repacking and Flashing:**
- The modified and patched boot image ( 'new-boot.img') is created.
- The log indicates the new boot image is being flashed onto the device.

**Further Investigation:**
The detected 'mmap' error requires further investigation. It could be related to:
* Incompatible Magisk version
* Kernel modifications
* Corrupted boot image
* Memory access problems

Reviewing the complete log file, device specifics, and recent system changes can help pinpoint the exact cause of the issue.

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