Commit Graph

472 Commits

Author SHA1 Message Date
topjohnwu
a4a661bf34 Small code restructuring 2019-03-11 12:44:50 -04:00
topjohnwu
5111086637 Don't care if child threads were unknown 2019-03-10 01:46:32 -05:00
topjohnwu
20f204810e Use RAII to detach PIDs 2019-03-10 01:14:41 -05:00
topjohnwu
4581354e7a Allow zygote to execve
Allow zygote to execute other programs (such as dex2oat).
This fixes the bug that cause ART framework boot images failed to load
and result to extremely serious performance degradation.

Fix #1195
2019-03-09 22:58:05 -05:00
topjohnwu
faf4d76388 Use large vector<bool> instead of set<pid>
vector<bool> uses bitsets, so we actually only use 12k memory to
store all 3 possible PID info tables. PID checkup will be now become
O(1) instead of O(logn).

P.S. The reason why we don't use unordered_map is because including it
will result in significant binary size increase (might be due to the
complex hash table STL implementation? I really don't know).
2019-03-09 22:28:43 -05:00
topjohnwu
70efddb90f Only use SELinux if necessary in init 2019-03-09 05:30:42 -05:00
topjohnwu
f24a5dfd45 More efficient xml parsing 2019-03-09 04:27:04 -05:00
topjohnwu
081074ad9d Better zygote process detection 2019-03-08 23:53:53 -05:00
topjohnwu
c134fb1939 Remove unnecessary rules 2019-03-08 04:21:23 -05:00
topjohnwu
0204d05316 Remove Zygote notifier
Temporary trigger process scan on packages.xml updates, will find better methods
2019-03-08 03:35:17 -05:00
topjohnwu
c345633d80 Fix build error
Close #1182
2019-03-08 01:01:42 -05:00
topjohnwu
a57a94040e Update some format magics 2019-03-08 00:47:15 -05:00
topjohnwu
1bde78d121 Rename patch_level -> os_patch_level 2019-03-07 21:59:03 -05:00
topjohnwu
bbd014ad1b More saftey checks and improvements 2019-03-07 21:49:47 -05:00
topjohnwu
1287372f5a Support patching header in magiskboot 2019-03-07 21:32:01 -05:00
topjohnwu
d2cb638fcd Use our own function to parse int 2019-03-07 20:31:35 -05:00
topjohnwu
bbe4b69c8d Fix LZ4FEncoder constructor 2019-03-07 19:58:59 -05:00
topjohnwu
7f08c06943 Remove unnecessary '--' from magiskboot actions 2019-03-07 18:07:23 -05:00
topjohnwu
0442d6d509 Only compress kernel and ramdisk if input not compressed 2019-03-07 07:24:20 -05:00
topjohnwu
915b49014f Build libsqlite.so only with magisk
Fix #1175
2019-03-07 05:21:27 -05:00
topjohnwu
82c864d57e Make zygote notifier more reliable 2019-03-06 18:22:04 -05:00
topjohnwu
6226f875ff Make db settings constructor more readable 2019-03-06 08:21:23 -05:00
topjohnwu
370015a853 Modernize database code (again) 2019-03-06 08:16:12 -05:00
topjohnwu
6597b7adc0 Add MicroG DroidGuardHelper as target
MicroG uses a different package to handle DroidGuard service (SafetyNet),
but still uses the same com.google.android.gms.unstable process name.
Thanks to the changes in 4e53ebfe, we can target both official GMS
and MicroG SafetyNet services at the same time.
2019-03-06 05:43:52 -05:00
topjohnwu
4e53ebfe44 Use both package name and process name as key
Different packages could potentially use the same process name,
and they shouldn't conflict with each other.
2019-03-06 05:40:52 -05:00
topjohnwu
04ef1e6405 Make parse prop file a util function 2019-03-05 20:27:09 -05:00
topjohnwu
b278d07b05 Switch to Zygote ptrace-ing
No matter if we use the old, buggy, error prone am_proc_start monitoring,
or the new APK inotify method, both methods rely on MagiskHide 'reacting'
fast enough to hijack the process before any detection has been done.

However, this is not reliable and practical. There are apps that utilize
native libraries to start detects and register SIGCONT signal handlers
to mitigate all existing MagiskHide process monitoring mechanism. So
our only solution is to hijack an app BEFORE it is started.

All Android apps' process is forked from zygote, so it is easily the
target to be monitored. All forks will be notified, and subsequent
thread spawning (Android apps are heaviliy multithreaded) from children
are also closely monitored to find the earliest possible point to
identify what the process will eventually be (before am_proc_bound).

ptrace is extremely complicated and very difficult to get right. The
current code is heaviliy tested on a stock Android 9.0 Pixel system,
so in theory it should work fine on most devices, but more tests and
potentially fixes are expected to follow this commit.
2019-03-05 20:23:27 -05:00
topjohnwu
6c3896079d Add zygote server notifier 2019-03-05 20:23:27 -05:00
topjohnwu
eaa9c7e2a0 Android Q init is not always a symlink 2019-03-03 14:56:36 -05:00
topjohnwu
14ae29d907 Support Android Q new init setup 2019-03-03 06:35:25 -05:00
topjohnwu
dee3c3e7ba Workaround seccomp on MagiskBoot
Close #1150
2019-03-02 05:46:15 -05:00
topjohnwu
d8cd2031c7 SIGSTOP any possible process ASAP
Shut down any UID matching process and resume if it turns out not to
be our target. Since we will record every single process we have ever
paused, this means that the same process will not be paused erroneously
for another time.

This is an optimization to hijack the app as soon as possible.
2019-03-02 04:24:41 -05:00
topjohnwu
7203e7df5c Create mapping from watch descriptor to UID 2019-03-02 03:44:24 -05:00
topjohnwu
b51feffe80 Limit process name match to cmdline only
We are only interested in Zygote forked processed
2019-03-01 18:13:41 -05:00
topjohnwu
b1afd554fc Application Component Granularity MagiskHide
Before switching to the new MagiskHide implementation (APK inotify),
logcat parsing provides us lots of information to target a process.
We were targeting components so that apps with multi-processes
can still be hidden properly.

After switching to the new implementation, our granularity is limited
to the UID of the process. This is especially dangerous since Android
allow apps signed with the same signature to share UIDs, and many system
apps utilize this for elevated permissions for some services.

This commit introduces process name matching. We could not blanketly
target an UID, so the workaround is to verify its process name before
unmounting.

The tricky thing is that any app developer is allowed to name the
process of its component to whatever they want; there is no 'one
rule to catch them all' to target a specific package. As a result,
Magisk Manager is updated to scan through all components of all apps,
and show different processes of the same app, each as a separate
hide target in the list.

The hide target database also has to be updated accordingly.
Each hide target is now a <package name, process name> pair. The
magiskhide CLI and Magisk Manager is updated to support this new
target format.
2019-03-01 17:08:08 -05:00
topjohnwu
e72c6685ed Support A only System-as-root Devices
Most Chinese devices (and supposedly Galaxy S10) running Android Pie
is using system-as-root without A/B partition.

https://source.android.com/devices/bootloader/system-as-root#about-system-as-root

According to the docs above, these devices will have a ramdisk block
with size 0 in their boot images. Since magiskinit can run independently
on system-as-root devices, we simply just create an empty ramdisk with
magiskinit added as init.

Huge thanks to @vvb2060 for the heads up and original PR.
Close #980, close #1102
2019-02-28 05:46:36 -05:00
John Wu
54a8a05dae Small adjustments in connect.cpp 2019-02-27 16:44:27 -05:00
vvb2060
0eef4eacd6 Use REBOOT foreground broadcast 2019-02-27 16:44:27 -05:00
topjohnwu
5764f0c839 Compiler flag enhancements
- Enable LTO
- Add -fomit-frame-pointer for even smaller binary size

This commit is inspired by #1075. Close #1075.
2019-02-26 03:42:44 -05:00
vvb2060
f152bea8d8 Trim dev name 2019-02-26 03:04:17 -05:00
topjohnwu
8032bd0bac Introduce /data mirror
Since we switched to imageless Magisk, module files are directly
stored in /data. However, /data is mounted with nosuid, which also
prevents SELinux typetransition to work (auto transition from one
domain to another when executing files with specific context).
This could cause serious issues when we are replacing system critical
components (e.g. app_process for Xposed), because most of them
are daemons that run in special process domains.

This commit introduced /data mirror. Using similar mirroring technique
we used for system and vendor, we mount another mirror that mounts
/data without nosuid flag. All module files are then mounted from this
mirror mountpoint instead of directly from /data.

Close #1080
2019-02-25 06:13:42 -05:00
topjohnwu
0c227f2917 Always clone attribute from existing files to module files
This makes sure no weird permission/SELinux issues shall happen
2019-02-25 05:17:08 -05:00
topjohnwu
c9fa8118d1 Some code adjustments 2019-02-24 23:09:34 -05:00
topjohnwu
63b18246d8 Add compressed ramdisk support 2019-02-24 20:39:01 -05:00
topjohnwu
16ec37a226 Fix compression without outname 2019-02-24 17:45:08 -05:00
topjohnwu
bd4e5bfc1a Some minor optmizations 2019-02-24 17:45:08 -05:00
topjohnwu
621fd0ee29 Fix SEGV_ACCERR on some 64 bit devices 2019-02-24 08:20:05 -05:00
topjohnwu
6ca8db2f0c Welcome to the 64 bit world!
Close #854
2019-02-24 08:13:27 -05:00
topjohnwu
ea129fb206 Allow cpio mv to override existing entries 2019-02-24 05:11:36 -05:00
topjohnwu
3356d7b6ff More friendly to obscure/outdated custom recoveries
Close #1049
2019-02-24 04:45:47 -05:00
topjohnwu
c84023bdc2 Fix crashes when removing verity_key 2019-02-24 04:29:15 -05:00
topjohnwu
86f778c0aa Group unsupported formats into the same code 2019-02-24 02:30:04 -05:00
topjohnwu
0f46493477 Compile magiskboot as static 2019-02-23 17:01:44 -05:00
topjohnwu
340bac7e42 Add decompression command 2019-02-23 16:53:51 -05:00
topjohnwu
1d3ce9fef1 Support loading CPIO from a chunk of bytes 2019-02-23 16:16:35 -05:00
topjohnwu
4a398642b8 Set mode in constructor 2019-02-23 15:22:11 -05:00
topjohnwu
9c89e56c56 Add ramdisk compression option 2019-02-23 15:04:15 -05:00
topjohnwu
267c59b1f1 Add truncate while open 2019-02-23 13:08:54 -05:00
topjohnwu
2ab17204c6 Add stream output for CPIO 2019-02-23 05:06:07 -05:00
topjohnwu
75939047d1 Fix bugs in compression 2019-02-23 04:51:13 -05:00
topjohnwu
2d7f130d2c Introduce Java-like OutputStream 2019-02-23 04:51:13 -05:00
topjohnwu
f7ae72a36c Move CPIO to libutils 2019-02-23 02:42:26 -05:00
topjohnwu
391783e268 Introduce mmap based CPIO class 2019-02-23 02:23:24 -05:00
topjohnwu
6f12c08204 Use ordered map to store CPIO entries 2019-02-22 22:53:20 -05:00
topjohnwu
cb8fe70734 Modernize CPIO code 2019-02-22 02:56:18 -05:00
topjohnwu
69d10b747a Directly use FDT headers for detection 2019-02-21 05:24:05 -05:00
topjohnwu
da3394f34e Move image parsing out of header searching 2019-02-21 05:08:38 -05:00
topjohnwu
b4c2a9f49f More macro magic 2019-02-21 04:14:52 -05:00
topjohnwu
7cee77f57a Some C++ magic to make code cleaner 2019-02-21 02:54:37 -05:00
topjohnwu
f28bd1972f Adjust LZ4F block size 2019-02-21 00:52:47 -05:00
topjohnwu
0f92d1de1b Fix bzip2 decompression 2019-02-20 20:53:54 -05:00
topjohnwu
e59c5c8780 Modernize compress and decompress 2019-02-20 20:49:26 -05:00
kirill9617
86d8026301 Update format.h
GZIP magic is \x1f\x8b\x08 not \x1f\x8b\x08\x00
2019-02-20 03:53:41 -05:00
topjohnwu
d67b827338 Rewrite compression with OOP 2019-02-20 02:10:06 -05:00
topjohnwu
660e0dc09a Fix MagiskHide unmount daemon
Close #1101
2019-02-19 01:50:41 -05:00
John Wu
3ebc886f8a Make sure PPID exists 2019-02-18 03:45:01 -05:00
vvb2060
5b54ef840a Skip same mount namespace 2019-02-18 03:45:01 -05:00
corsicanu
0f61c627b1 Support deodexed ROM on Pie (Samsung)
- cc @abrahamgcc
2019-02-18 03:32:56 -05:00
topjohnwu
17ab55115a Add newlines before rc scripts
Based on #1090, thanks to @shakalaca. Close #1090, close #1086
2019-02-18 03:30:30 -05:00
topjohnwu
2708c74ebe Add O_CLOEXEC to opens 2019-02-18 03:25:21 -05:00
topjohnwu
50ff11405f Swap out inotify fd before adding watch targets 2019-02-18 03:18:11 -05:00
topjohnwu
31a27838f5 Fix help message for magisk 2019-02-18 03:09:01 -05:00
topjohnwu
2f1b0fe57f Remove unused scripts 2019-02-18 03:08:40 -05:00
topjohnwu
692f893e1f Monitor /data/system/packages.xml
Reinstalling system apps as data creates tons of issues.
Calling pm path <pkg> is extremely expensive and doesn't work in post-fs-data.
Parse through packages.xml to get APK path and UID at the same time.
As a bonus, we don't need to traverse /data/app for packages anymore.
2019-02-18 03:05:13 -05:00
topjohnwu
14aa6041ec Use a better function to read through files 2019-02-17 22:30:23 -05:00
topjohnwu
fb55fe184c Hide useless error message 2019-02-16 03:41:37 -05:00
topjohnwu
6412bfc7b5 Only care about the first event 2019-02-16 02:49:36 -05:00
topjohnwu
3c56f38229 Change most logs to debug logs 2019-02-16 02:30:48 -05:00
topjohnwu
f4f2274c60 Auto reinstall system apps on hide list
Since we are parsing through /data/app/ to find target APKs for
monitoring, system apps will not be covered in this case.
Automatically reinstall system apps as if they received an update
and refresh the monitor target after it's done.

As a bonus, use RAII idioms for locking pthread_mutex_t.
2019-02-16 02:24:35 -05:00
topjohnwu
19ee189468 Separate scripting code 2019-02-15 20:45:05 -05:00
topjohnwu
a19c7215d2 Better nice name 2019-02-15 04:31:39 -05:00
topjohnwu
8b84039f1f Run service scripts actually in parallel 2019-02-15 01:30:47 -05:00
topjohnwu
9430dbb96c Make sure logcat process does not become a zombie 2019-02-14 17:36:18 -05:00
topjohnwu
4872df6a46 Support old APK paths and don't crash when not match 2019-02-14 16:38:28 -05:00
topjohnwu
014105f0a0 Bring back log dumping 2019-02-14 04:27:30 -05:00
topjohnwu
b106d1c501 Fix stupid mistake 2019-02-14 04:24:30 -05:00
topjohnwu
99db0672b4 Minor MagiskHide adjustments
- Fail fast on unsupported systems
- Show proper fail message on unsupported systems
- inotify_fd shall be swapped out before closing to prevent
  the proc_monitor thread to read from incomplete inotify fd
2019-02-14 04:08:05 -05:00
topjohnwu
d584360de2 More optimized APK traversal 2019-02-14 00:52:59 -05:00
topjohnwu
4eed6794c7 More MagiskHide optimizations
- Use a general procfs traversal function with callbacks
- Much better functions for killing processes
2019-02-13 20:16:26 -05:00
topjohnwu
c66cabd80f Several MagiskHide improvements
- Directly get UID instead of traversing /data/data everytime
- Use /data/user_de/0 instead of /data/data on Android 7.0+
- Update hide_uid set incrementally when adding/initializing targets
- Guard hide_uid set with the same lock as hide_list vector
- Do not add GMS package into database; only add to in-memory list
2019-02-13 06:16:26 -05:00