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Disallow new untrusted_app access to /proc/tty/drivers

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Access is deprecated for apps with targetSdkVersion=26+.

Test: build (neverallow rules are build time assertions)
Change-Id: I36480c38d45cf6bfb75f4988ffcefefc6b62d4b1
This commit is contained in:
Jeff Vander Stoep 2018-09-07 07:39:28 -07:00
parent ac4b6478c1
commit ff511cb5db
1 changed files with 8 additions and 0 deletions
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8
private/app_neverallows.te
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@ -265,3 +265,11 @@ full_treble_only(`
# Untrusted apps are not allowed to find mediaextractor update service.
neverallow all_untrusted_apps mediaextractor_update_service:service_manager find;
# Access to /proc/tty/drivers, to allow apps to determine if they
# are running in an emulated environment.
# b/33214085 b/33814662 b/33791054 b/33211769
# https://github.com/strazzere/anti-emulator/blob/master/AntiEmulator/src/diff/strazzere/anti/emulator/FindEmulator.java
# This will go away in a future Android release
neverallow { all_untrusted_apps -untrusted_app_25 } proc_tty_drivers:file r_file_perms;
neverallow all_untrusted_apps proc_tty_drivers:file ~r_file_perms;