From ccf343fa5b51fb0b695ff7444111971d458eeefe Mon Sep 17 00:00:00 2001 From: Kalesh Singh Date: Mon, 6 Dec 2021 16:13:06 -0800 Subject: [PATCH] Add group ID for reading tracefs Add AID_READTRACEFS and mount tracefs with gid=AID_READTRACEFS Bug: 209513178 Test: adb shell ls -l /sys/kernel/tracing/events Change-Id: Ibbfdf8a4b771bd7520ecbaaf15a1153d6bf0e599 --- libcutils/include/private/android_filesystem_config.h | 1 + rootdir/init.rc | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/libcutils/include/private/android_filesystem_config.h b/libcutils/include/private/android_filesystem_config.h index e65fe9296..9b5d05252 100644 --- a/libcutils/include/private/android_filesystem_config.h +++ b/libcutils/include/private/android_filesystem_config.h @@ -158,6 +158,7 @@ #define AID_READPROC 3009 /* Allow /proc read access */ #define AID_WAKELOCK 3010 /* Allow system wakelock read/write access */ #define AID_UHID 3011 /* Allow read/write to /dev/uhid node */ +#define AID_READTRACEFS 3012 /* Allow tracefs read */ /* The range 5000-5999 is also reserved for vendor partition. */ #define AID_OEM_RESERVED_2_START 5000 diff --git a/rootdir/init.rc b/rootdir/init.rc index b09c2f122..42545d99a 100644 --- a/rootdir/init.rc +++ b/rootdir/init.rc @@ -78,8 +78,8 @@ on early-init mkdir /dev/boringssl 0755 root root mkdir /dev/boringssl/selftest 0755 root root - # Mount tracefs - mount tracefs tracefs /sys/kernel/tracing + # Mount tracefs (with GID=AID_READTRACEFS) + mount tracefs tracefs /sys/kernel/tracing gid=3012 # create sys dirctory mkdir /dev/sys 0755 system system