PWN-Hunter/android_system_sepolicy
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Define policy for /proc/uid_procstat/set.

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New procfs file written by the system_server to communicate fg/bg
state of UIDs to switch the statistics counter sets used.

avc: denied { write } for name="set" dev="proc" ino=4026531862 scontext=u:r:system_server:s0 tcontext=u:object_r:proc:s0 tclass=file permissive=1

Test: builds, boots, counter sets updated
Bug: 34360629
Change-Id: I2efbfbba9e73f50ce50a80a3dffd3b14fa55c048
This commit is contained in:
Jeff Sharkey 2017-01-17 18:33:50 -07:00
parent fa12010697
commit 828433c892
3 changed files with 5 additions and 0 deletions
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1
private/genfs_contexts
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@ -32,6 +32,7 @@ genfscon proc /timer_stats u:object_r:proc_timer:s0
genfscon proc /tty/drivers u:object_r:proc_tty_drivers:s0
genfscon proc /uid_cputime/show_uid_stat u:object_r:proc_uid_cputime_showstat:s0
genfscon proc /uid_cputime/remove_uid_range u:object_r:proc_uid_cputime_removeuid:s0
genfscon proc /uid_procstat/set u:object_r:proc_uid_procstat_set:s0
genfscon proc /zoneinfo u:object_r:proc_zoneinfo:s0
# selinuxfs booleans can be individually labeled.

1
public/file.te
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@ -23,6 +23,7 @@ type proc_timer, fs_type;
type proc_tty_drivers, fs_type;
type proc_uid_cputime_showstat, fs_type;
type proc_uid_cputime_removeuid, fs_type;
type proc_uid_procstat_set, fs_type;
type proc_zoneinfo, fs_type;
type selinuxfs, fs_type, mlstrustedobject;
type cgroup, fs_type, mlstrustedobject;

3
public/system_server.te
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@ -112,6 +112,9 @@ allow system_server proc_uid_cputime_showstat:file r_file_perms;
# Write /proc/uid_cputime/remove_uid_range.
allow system_server proc_uid_cputime_removeuid:file { w_file_perms getattr };
# Write /proc/uid_procstat/set.
allow system_server proc_uid_procstat_set:file { w_file_perms getattr };
# Write to /proc/sysrq-trigger.
allow system_server proc_sysrq:file rw_file_perms;