GKI_KernelSU_SUSFS/.github/actions/susfs-revert-patches/action.yml

name: 'Revert SUSFS Fake Patches'
description: 'Revert version-specific fake patches after kernel patch application'
inputs:
  version:
    description: 'Kernel config version (e.g., android15-6.6)'
    required: true
  sublevel:
    description: 'Kernel sublevel'
    required: true
  os_patch_level:
    description: 'OS patch level (e.g., 2024-07)'
    required: true

runs:
  using: "composite"
  steps:
    - name: Revert Android 12 5.10 Fake Patches
      shell: bash
      if: inputs.version == 'android12-5.10'
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        if [ "${{ inputs.sublevel }}" -le "43" ]; then
          echo "Reverting base.c Android 12 5.10 Fake Patch"
          sed -i 's/^size_t this_len = min_t(size_t, count, PAGE_SIZE);$/int this_len = min_t(int, count, PAGE_SIZE);/' fs/proc/base.c
        fi
        if [ "${{ inputs.sublevel }}" -le "117" ]; then
          echo "Reverting fdinfo.c Android 12 5.10 Fake Patch"
          perl -i -pe 's/^(\\s+if \\(inode\\) \\{)/$1\n\t\t\\/\\*\n\t\t * IN_ALL_EVENTS represents all of the mask bits\n\t\t * that we expose to userspace.  There is at\n\t\t * least one bit (FS_EVENT_ON_CHILD) which is\n\t\t * used only internally to the kernel.\n\t\t * \\/\n\t\tu32 mask = mark->mask & IN_ALL_EVENTS;/m' fs/notify/fdinfo.c
          perl -i -pe 's/\\binotify_mark_user_mask\\(mark\\)/mask, mark->ignored_mask/g' fs/notify/fdinfo.c
          perl -i -pe 's/ignored_mask:0/ignored_mask:%x/g' fs/notify/fdinfo.c
        fi

    - name: Revert Android 13 5.10 Fake Patches
      shell: bash
      if: inputs.version == 'android13-5.10'
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        if [ "${{ inputs.sublevel }}" -le "107" ]; then
          echo "Reverting fdinfo.c Android 13 5.10 Fake Patch"
          perl -i -pe 's/^(\\s+if \\(inode\\) \\{)/$1\n\t\t\\/\\*\n\t\t * IN_ALL_EVENTS represents all of the mask bits\n\t\t * that we expose to userspace.  There is at\n\t\t * least one bit (FS_EVENT_ON_CHILD) which is\n\t\t * used only internally to the kernel.\n\t\t * \\/\n\t\tu32 mask = mark->mask & IN_ALL_EVENTS;/m' fs/notify/fdinfo.c
          perl -i -pe 's/\\binotify_mark_user_mask\\(mark\\)/mask, mark->ignored_mask/g' fs/notify/fdinfo.c
          perl -i -pe 's/ignored_mask:0/ignored_mask:%x/g' fs/notify/fdinfo.c
        fi

    - name: Revert Android 13 5.15 Fake Patches
      shell: bash
      if: inputs.version == 'android13-5.15'
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        if [ "${{ inputs.sublevel }}" -le "41" ]; then
          echo "Reverting namespace.c Android 13 5.15 Fake Patch"
          sed -i '/#include <linux\/mnt_idmapping.h>$/d' fs/namespace.c
          echo "Reverting open.c Android 13 5.15 Fake Patch"
          sed -i '/#include <linux\/mnt_idmapping.h>$/d' fs/open.c
          echo "Reverting fdinfo.c Android 13 5.15 Fake Patch"
          perl -i -pe 's/^(\\s+if \\(inode\\) \\{)/$1\n\t\t\\/\\*\n\t\t * IN_ALL_EVENTS represents all of the mask bits\n\t\t * that we expose to userspace.  There is at\n\t\t * least one bit (FS_EVENT_ON_CHILD) which is\n\t\t * used only internally to the kernel.\n\t\t * \\/\n\t\tu32 mask = mark->mask & IN_ALL_EVENTS;/m' fs/notify/fdinfo.c
          perl -i -pe 's/\\binotify_mark_user_mask\\(mark\\)/mask, mark->ignored_mask/g' fs/notify/fdinfo.c
          perl -i -pe 's/ignored_mask:0/ignored_mask:%x/g' fs/notify/fdinfo.c
          sed -i 's|i_uid_into_mnt(i_user_ns(&fi->inode), &fi->inode).val|i_uid_into_mnt(\\&init_user_ns, \\&fi->inode).val|g' fs/susfs.c
          sed -i 's|i_uid_into_mnt(i_user_ns(inode), inode).val|i_uid_into_mnt(\\&init_user_ns, inode).val|g' fs/susfs.c
        fi
        if [ "${{ inputs.sublevel }}" -ge "197" ]; then
          echo "Reverting namespace.c Android 13 5.15 Fake Patch"
          sed -i '/^#include "internal.h"$/a #include <trace/hooks/blk.h>' fs/namespace.c
        fi
        if [ "${{ inputs.sublevel }}" -ge "206" ]; then
          echo "Reverting task_mmu.c Android 13 5.15 Fake Patch"
          sed -i '/^#include <linux\/pkeys.h>$/a #include <trace/hooks/mm.h>' fs/proc/task_mmu.c
        fi

    - name: Revert Android 14 6.1 Fake Patches
      shell: bash
      if: inputs.version == 'android14-6.1'
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        if [ "${{ inputs.sublevel }}" -le "25" ]; then
          sed -i '/^#include <trace\/hooks\/sched.h>$/d' fs/proc/base.c
        fi
        if [ "${{ inputs.sublevel }}" -le "141" ]; then
          echo "Reverting base.c Android 14 6.1 Fake Patch"
          sed -i '/^#include <linux\/dma-buf.h>$/d' fs/proc/base.c
        fi
        if [ "${{ inputs.sublevel }}" -ge "157" ]; then
          echo "Reverting namespace.c Android 14 6.1 Fake Patch"
          sed -i '/^#include "internal.h"$/a #include <trace/hooks/blk.h>' fs/namespace.c
        fi

    - name: Revert Android 15 6.6 Fake Patches
      shell: bash
      if: inputs.version == 'android15-6.6'
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        echo "Reverting 6.6 Fake Patches"
        if [ "${{ inputs.sublevel }}" -le "92" ]; then
          echo "Reverting base.c Android 15 6.6 Fake Patch"
          sed -i '/^#include <linux\/dma-buf.h>$/d' fs/proc/base.c
        fi
        if [ "${{ inputs.sublevel }}" -le "57" ]; then
          echo "Reverting memory.c Android 15 6.6 Fake Patch"
          sed -i '/^#include <linux\/zswap.h>$/d' mm/memory.c
        fi

    - name: Revert Android 16 6.12 Fake Patches
      shell: bash
      if: inputs.version == 'android16-6.12'
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        echo "Reverting 6.12 Fake Patches"
        if [ "${{ inputs.sublevel }}" -ge "58" ]; then
          echo "Reverting exec.c Android 16 6.12 Fake Patch"
          sed -i '/^#include /a #include <linux/dma-buf.h>' fs/exec.c
        fi
        if [ "${{ inputs.sublevel }}" -ge "69" ]; then
          echo "Reverting task_mmu.c Android 16 6.12 Fake Patch"
          sed -i 's/vma_pages/vma_data_pages/g' fs/proc/task_mmu.c
        fi

    - name: Apply show_pad Fix
      shell: bash
      if: true
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        SHOW_PAD_FIX=0
        if [[ "${{ inputs.version }}" = "android12-5.10" && "${{ inputs.sublevel }}" -le 209 ]]; then
          SHOW_PAD_FIX=1
        elif [[ "${{ inputs.version }}" = "android13-5.10" && "${{ inputs.sublevel }}" -le 209 && "${{ inputs.os_patch_level }}" != "2024-05" ]]; then
          SHOW_PAD_FIX=1
        elif [[ "${{ inputs.version }}" = "android13-5.15" && "${{ inputs.sublevel }}" -le 148 && "${{ inputs.os_patch_level }}" != "2024-05" ]]; then
          SHOW_PAD_FIX=1
        elif [[ "${{ inputs.version }}" = "android14-5.15" && "${{ inputs.sublevel }}" -le 148 && "${{ inputs.os_patch_level }}" != "2024-05" ]]; then
          SHOW_PAD_FIX=1
        elif [[ "${{ inputs.version }}" = "android14-6.1" && "${{ inputs.sublevel }}" -le 75 && "${{ inputs.os_patch_level }}" != "2024-05" ]]; then
          SHOW_PAD_FIX=1
        fi

        if [[ "$SHOW_PAD_FIX" = "1" ]]; then
          sed -i -e 's/goto show_pad;/return 0;/' ./fs/proc/task_mmu.c
        fi