Label sysfs usb nodes.
Some legitimate functionality currently requires direct sysfs access
that is not otherwise possible via the android APIs. Specifically,
isochronous USB transfers require this direct access, without which USB
audio applications would noticibly suffer.
Grant read access to the usb files under /sys/devices to prevent this regression.
Bug: 28417852
Change-Id: I24b9c81b2a7e21a947d72bee3c15f3422a35d36c
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index b8dc5f6..c9619fd 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -89,6 +89,7 @@
/sys/devices/platform/host1x/capabilities/[^/]* u:object_r:sysfs_gpu:s0
/sys/devices/platform/host1x/gk20a\.0/ptimer_scale_factor u:object_r:sysfs_gpu:s0
/sys/devices/platform/tegra12-i2c\.0/i2c-0/0-0036/power_supply/battery/capacity u:object_r:sysfs_batteryinfo:s0
+/sys/devices/platform/tegra-ehci\.[0-9]+(/.*)? u:object_r:sysfs_usb:s0
/sys/devices/virtual/block/zram0/mm_stat u:object_r:sysfs_swap:s0
/sys/devices/virtual/block/zram0/mem_used_total u:object_r:sysfs_swap:s0
/sys/devices/soc0/family u:object_r:sysfs_socinfo:s0
