Skip to content

zygisk: exempt the manager host from DENY_PROCESS_PTRACE on GrapheneOS #1019

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
david568303 wants to merge 1 commit into
base: master
Choose a base branch
from
Open

zygisk: exempt the manager host from DENY_PROCESS_PTRACE on GrapheneOS #1019

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 10 additions & 0 deletions zygisk/src/main/kotlin/org/matrix/vector/GrapheneDclHooker.kt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,16 @@ object GrapheneDclHooker {
"android.ext.settings.app.AswRestrictMemoryDynCodeLoading",
"android.ext.settings.app.AswRestrictStorageDynCodeLoading",
"android.ext.settings.app.AswRestrictWebViewDynCodeLoading",
// DENY_PROCESS_PTRACE (SELinuxFlags bit 1<<8). SELinuxFlags.get() leaves it armed
// unless AswDenyNativeDebug returns false, and that switch is immutably true for every
// system app — including the manager's host, com.android.shell. The parasitic manager
// is injected over ptrace (NeoZygisk/Zygisk), so with this flag set the host's
// specialization aborts in selinux_android_setcontext2():
// "selinux_android_setcontext(2000, 0, "platform:privapp:...", "<manager>",
// grapheneos_flags: "100") failed" -> zygote SIGABRT, crash-looping the manager.
// (The three DCL switches above already strip bits 0..7, which is why the surviving
// flag is exactly 0x100.) Exempting the host clears it so the spawn succeeds.
"android.ext.settings.app.AswDenyNativeDebug",
)

@JvmStatic
Expand Down