Questions tagged [selinux]
98
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How to get avc logging ( selinux ) in Android working?
I am on Android 10. Whether I setenforce 0 or 1- I cannot get avc ( aka SeLinux ) errors logged. I checked ramoops files also and its ditto.
root@m20lte:/ # setenforce 1 ...
- 457
0
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0
answers
48
views
How do I log denials for offline charging mode
I've been able to fix offline charging animation on my device but it only works in permissive domain and whilst in enforcing it shows me random lines and i can't figure out a way to address the ...
- 1
1
vote
0
answers
164
views
How to fix a bootloop caused by accidental "fix contexts" from TWRP?
I am using TWRP recovery on my Redmi Note 10 Pro device for a long time, but recently while using TWRP recovery, I mistakenly clicked on 'fix contexts' option and now my phone is stuck in a bootloop.
...
1
vote
0
answers
84
views
How to make `/system` dir files readable using `sepolicy-inject` tool?
In enforcing SELinux state, Android /system files become unavailable to read in explorer. How to make /system dir files readable using sepolicy-inject tool?
Also, need sepolicy-inject command for ...
- 19
0
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0
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57
views
init.rc won't run iptables-restore but runs iptables
I have this code in /system/etc/init/fw.sh that works great:
on post-fs-data
exec u:r:magisk:s0 -- /system/bin/iptables -P INPUT DROP
But the line below does not work:
exec u:r:magisk:s0 -- /...
- 31
1
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0
answers
160
views
Access "data/tombstones/" dir from Android application
Trying to get access to "data/tombstones" directory from my rooted phone. I am implementing a crash collector application (system application) which would help to record the system's ANRs ...
- 79
1
vote
0
answers
65
views
SELinux denials after migrating application data between devices
I'm trying to migrate application data between devices. The application was installed to the work profile using Shelter The steps I did were:
On source phone, tar cvf appdata.tar.gz /data/user/10/com....
- 259
3
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0
answers
165
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Create custom SELinux domain using magiskpolicy
Tried to make custom domain for an app that is installed from PlayStore. I created a module that would patch the policy at boot and edited system/etc/selinux/plat_seapp_contexts to assign the app my ...
- 31
2
votes
1
answer
469
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Exploring options for customizing SeLinux policy ( SePolicy to enable bind-mounting ) , including kernel recompilation
As I realized selinux for Android is more than tad bit different creature than what I can get done on Linux . I need SeLinux policy to be modified so I can bind mount my folders. Unless that happens ...
- 61
1
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0
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204
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pstore/ramoops won't work on Poco M3, rooted
I'm trying to use pstore logs on my Poco M3. I tried everything. PSTORE configs are activated on the kernel, pstore module is loaded on the phone, phone is rooted, /sys/fs/pstore is mounted ...
- 61
0
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0
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629
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open failed: EACCES (Permission denied)
I am trying to copy the file from /storage/emulated/0/test.txt to /cache/SH_DIR/ via android user application ,
getting error like below :
java.io.FileNotFoundException: /cache/SH_DIR/test.txt: open ...
- 119
1
vote
0
answers
239
views
Should SELinux be Permissive to access /dev/diag
I am trying to set the SELinux to permissive on Android with no luck.
I tried the command su 0 setenforce 0 it returns OK while still being Enforcing if checking immediately using getenforce command.
...
- 11
1
vote
0
answers
199
views
Stuck in boot loop after "Fixing SELinus contexts"
So, let's say that I have already "Fixed SELinux Contexts", and I am now in a boot loop. How could I resolve this issue.
I am quite new to all of this, but I am eager to learn and fix my ...
- 11
2
votes
0
answers
552
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remount, turn off SElinux, all fails even though I am root
I have a device which is never hacked into before, mostly as nobody has it, it is a android tv box. I have temp root using the dirty cow exploit, and tried to remount system using the mount command. ...
1
vote
0
answers
48
views
why DAC isn't sufficient for Android that it needs MAC(selinux)
I learned that each app is assigned a separate UID so that a rogue app cannot access other apps data and system sensetive data and files.
What's problem with this that they have to use MAC(selinux)
- 11
2
votes
0
answers
56
views
How would the app DiskDigger be able to get past SELinux when adbd/SuperSU/etc. cannot?
Okay, so I was able to recover my deleted files after all. I am the furthest thing from a software developer, and I don't have more time to spend on this, but I wanted to explain how I fixed it and ...
- 49
1
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0
answers
204
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Attempting file recovery (deleted photos) on Note 4 via accessing /data/userdata; rooted phone, patched adbd, but now USB debugging won't work
I made a post about this yesterday, and I managed to make a lot of progress today, but I'm stuck again, and I am trying to decide what to do. I am not really experienced with coding, but I happen to ...
- 49
1
vote
0
answers
1k
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How to mount a tmpfs directory that would be allowed to be read and written to by any app? (root available)
I am trying to create some volatile (tmpfs) storage for my Android, to avoid clutter.
I am trying to follow the previous questions:
making manually mounted partition folders write accessible to all ...
1
vote
0
answers
293
views
Result of ls -la in adb shell
If I go into my unrooted phone's adb shell (Samsung galaxy s7 Android 8) I get a result similar to this:
dr-xr-xr-x 921 root root 0 2020-01-26 10:06 acct
-rw-r--r-- 1 root root 225 ...
- 381
1
vote
0
answers
333
views
Starting shell script at boot in SELinux enforcing mode [closed]
I am building Android Pie (tag android-9.0.0_r46, branch android-msm-marlin-3.18-pie-qpr2) from source. I am testing on a Pixel XL (marlin). I want to have a custom shell script run automatically when ...
- 111
2
votes
0
answers
756
views
SUPolicy to allow custom service to read and write from Internal Storage
I'm setting up custom service with custom sepolicy using this as a base:
How to fix SELinux "avc: denied" errors when launching DNSCrypt as init.d script?
In 99% I follow the quick summary ...
- 79
1
vote
0
answers
1k
views
How to force SELinux to permissive even when setenforce 0 is not working and kernel was 100% permissive when flashed?
I don't know what to do, I'm using Samsung Note 3 (Exynos) - N900 with custom Resurrection Remix 5.8.5 ROM (Android 7.1.2) with it's own permissive kernel and rooted with Magisk. Yesterday it turned ...
- 11
2
votes
1
answer
2k
views
Run script using init.rc doesn't work
I'm trying to run a script that exectues when the device has finished booting. This particular device does not support running scripts from an init.d directory, which is why I am using init.rc.
The ...
- 41
2
votes
1
answer
145
views
How are apps installed on Android ? context - symbolic links of only some apps disappear after reboot
I am using Apps2sd to move some apps to ext4 partition mmcblk1p2. It successfully moved 1 app ( see code below ) but after linking another , the symblink for app gets deleted but data folder's ...
- 457
1
vote
1
answer
2k
views
Need to add custom script as service in init.rc for Android 10
I am trying run shell script in device boot-up time.
Steps:
Created shell script and placed into /system/bin/usbmountd.sh
Added test.sh in inir.rc.
service usbmountd /system/bin/usbmountd.sh
user ...
- 119
0
votes
0
answers
3k
views
How to disable zip verification flag in stock recovery.img?
In stock recovery there is an option to install zip from the sdcard but it doesn't allow installing zips with unknown signature. Twrp can install any zip without concerning about the the zip signature....
- 931
1
vote
0
answers
76
views
How to add a simple file on /system without actually modifying it but with using kernel sources? [closed]
From the time system-as-root came, developers have rooted different devices by patching the Magisk su binaries in the kernel. I want to understand how exactly they have done this so to start from ...
- 931
4
votes
1
answer
3k
views
How to mount system under super partion?
Google has recently changed the way to mount system and introduced Dynamic Partitions. Previously in a rooted adb shell, I used to run mount -o rw,remount /system to mount system in read-write mode. ...
- 931
4
votes
1
answer
2k
views
What is 02 in the magisk patched vbmeta.img?
According to the Additional Info given for rooting the Android device that doesn't have ramdisk but can be rooted via recovery: we need an empty vbmeta.img and I am trying to check what it actually ...
- 931
1
vote
0
answers
386
views
How can I record call using c code(c executable that can run on Android-Linux) on rooted Android device?
I want to record a call that is called by my application for the call test purposes. We record a call and compare it with a high-quality WAV file to determine the call quality. But the call recording ...
- 931
4
votes
1
answer
5k
views
SELinux permissive kernel - is it a security risk?
As in title. I am talking of Kernel, not ROM (plenty of questions dealing with ROM on this site).
I have a OnePlus 7 running stock Android 10 and prefer a custom kernel. Of late, OnePlus hasn't ...
- 39.9k
0
votes
1
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1k
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how to extend support for EXT4 file system for microSD cards in stock or non lineage / CyanogenMod ROMS
As I am aware after Android 4.4 or some sort your storage card is no longer eXposed directly and needs to be carefully interfaced through specific Mount points that need to be aware through vold ...
- 457
1
vote
2
answers
2k
views
How to add SELinux policy on a user-debug ROM that has `split` policy scheme?
I have a Sony device that supports treble and is a system-as-root and A/B device. It has a user-debug ROM installed on it so, its adb shell is rooted.
I have disabled dm-verity using adb disable-...
- 931
4
votes
1
answer
4k
views
How to disable dm-verity on `Treble` , `system-as-root` device?
Background: Please check following links
How to disable dm-verity on Android with “user” build type ROM?
Stuck in boot-loop when unpack and pack system.img?
Update: So, I am trying to disable dm-...
- 931
6
votes
1
answer
12k
views
What does TWRP "Fix Contexts" do?
In my blu_spark TWRP, I have an option (under "Advanced") named 'Fix Contexts'.
When I press it, it says:
Note: Fixing contexts is rarely needed
Fixing SELinux Contexts may cause your ...
- 427
0
votes
0
answers
5k
views
How to enforce Selinux (setprop ro.boot.selinux=enforcing)
I have a Xiaomi Redmi K20 Pro (raphael, China Version) device.
I set the prop "ro.boot.selinux" to "permissive", by installing this Magisk Module.
Now I'd like to set it back to "enforcing", but didn'...
- 11
0
votes
0
answers
3k
views
Stuck in boot-loop when unpack and pack `system.img`?
Background: I have a treble and system-as-root but it is not an A/B Samsung device. I am trying to modify the system.img. Before that, I have rooted it with the steps given here. After following these ...
- 931
0
votes
0
answers
2k
views
How to patch `system.img` using MagiskManager patch feature to root the device?
I have a treble and system-as-root but it is not an A/B device. I have rooted it with the help of the MagiskManager patch feature. My understanding is: MagiskManager has modified the following three ...
- 931
2
votes
1
answer
23k
views
How to fix: only official released binaries are allowed to be flashed(recovery) on device / FAIL! (Auth) on Odin3 v3.13?
I have Samsung S10 5G(Qualcomm) device. This device has unlocked bootloader but it is not rooted yet.
I am trying to learn Unpack-Modify-Pack the ROM images.
Currently, I have VZW stock ROM ...
- 931
0
votes
0
answers
3k
views
How to get rid of SeLinux Denials in Permissive mode?
Need some help with 3 issues:
In Permissive mode I get denials, why does this happen and how do I fix that?
If I am enforced, how do I give access to my Partitions to various processes. Right now I ...
- 457
5
votes
1
answer
2k
views
How to run a program in an app context with Magisk?
Let's say I'm currently as root in Bash on a terminal, outside any app like Termux. I'm running Magisk.
Now I want to synchronously invoke Termux's Bash, such that it behaves the same way as it would ...
- 624
1
vote
1
answer
7k
views
SELinux always set to permissive, how to set enforcing permanently?
I flash a custom ROM to my HTC B2UL.
The ROM, by default, has the SELinux policy set to Permissive instead of Enforcing.
I can use adb shell setenforce 1 to make SElinux enforcing. But after reboot, ...
- 13
12
votes
3
answers
54k
views
How to unpack/repack system.img of android ROM?
I have OnePlus 6T device which has A/B partition system and has a ROM of user type i.e [ro.build.type]: [user]. This device is rooted with Magisk. I have a requirement(Want to place customized ...
- 931
6
votes
2
answers
47k
views
How to disable dm-verity on Android with "user" build type ROM?
I have One Plus 6T Android device which has a ROM of build type user. This device is rooted with Magisk and I want to disable dm-verity on this device. I have tried to run adb disable-verity but I got ...
- 931
6
votes
2
answers
3k
views
How to make SELinux injected rules persistent without unpacking-packing boot.img?
I am working on an application that needs root access and I have a device which is rooted but not with Magisk. This device has only adb shell root available. So, I need an alternative to call the ...
- 931
-2
votes
1
answer
1k
views
SELinux temporary set to permissive
I am using a Galaxy s10+, rooted with magisk, no custom ROM, no custom kernel and no custom recovery. The rooting is heavily limited because of the SELinux enforce mode. Actually, no root command in ...
2
votes
1
answer
6k
views
How to set SELinux enforcing, config file not found?
I have Samsung Galaxy J7 Core (SM-J701F), I'm running Magisk on my device and I ran the SafteyNet test and it failed. While trying to solve this I tried to change selinux state to enforced by editing /...
0
votes
0
answers
1k
views
How to create Android sepolicy based on the denial "execute_no_trans"?
I am trying to execute my script /vendor/bin/init.inmod.sh using below method:
Script init.inmod.sh:
#!/shebang???
/vendor/bin/test_disp hdcp disable
In vendor specific .rc file:
on ???
start ...
- 1
0
votes
1
answer
2k
views
SELinux Policy from Permissive to Enforcing
Using Nexus 5 with AospExtended ROM (Android 9) 19/04/05
The ROM, by default, has the SELinux policy set to Permissive instead of Enforcing.
Is there any way, perhaps using TWRP Recovery, to change ...
1
vote
1
answer
865
views
Adding custom bootup script to Android-x86 Nougat
I've been happy using Android-x86 Nougat on my system. Thanks to everyone who made that work.
I'm now trying to make one small change which is that I want to run a custom init script (a shell script) ...
- 11