tequilaOS/platform_system_sepolicy
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Allow shell debugfs read access

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Developers should be able to use systrace with user builds.
This requires read access to /sys/kernel/debug/tracing/trace,
otherwise the following error occurs:

  $ atrace
  capturing trace... done
  TRACE:
  error opening /sys/kernel/debug/tracing/trace: Permission denied (13)

with the following SELinux denial:

  <4>[   79.830542] type=1400 audit(11940551.039:8): avc:  denied  { read } for  pid=1156 comm="atrace" name="trace" dev="debugfs" ino=3024 scontext=u:r:shell:s0 tcontext=u:object_r:debugfs:s0 tclass=file

At least on the kernel I've tested this on, debugfs doesn't support
setting SELinux file labels. Grant read access to all of debugfs to
work around this limitation.

Bug: 13904660
Change-Id: Ib58e98972c5012e9b34fec9e0a6094641638cd9a
This commit is contained in:
Nick Kralevich 2014-04-30 11:35:02 -07:00
parent 6838cd54e7
commit 0e06c13784
1 changed files with 7 additions and 0 deletions
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7
shelldomain.te
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@ -25,3 +25,10 @@ allow shelldomain shell_prop:property_service set;
allow shelldomain ctl_dumpstate_prop:property_service set;
allow shelldomain debug_prop:property_service set;
allow shelldomain powerctl_prop:property_service set;
# systrace support - allow atrace to run
# debugfs doesn't support labeling individual files, so we have
# to grant read access to all of /sys/kernel/debug.
# Directory read access and file write access is already granted
# in domain.te.
allow shelldomain debugfs:file r_file_perms;