tag 81b6571e1ec45a3acf2bfd52af95dfc10db0872d
tagger The Android Open Source Project <initial-contribution@android.com> Wed Jan 31 13:29:10 2018 -0800
object bb4f60472878faa9b79e0a170ea72e5c67d51bf2

Android Wear 8.0.0 Release 0.3

commit bb4f60472878faa9b79e0a170ea72e5c67d51bf2
author Janis Danisevskis <jdanis@google.com> Thu Apr 14 13:57:03 2016 +0100
committer Alain Vongsouvanh <alainv@google.com> Tue Nov 14 09:54:48 2017 -0800
tree 23bad7840f75077cbb20b9c69bcb61f7e0bbaffa
parent 78adc91726ec2a92691a422c503bc1afcd1d2a9d

UPSTREAM: procfs: fixes pthread cross-thread naming if !PR_DUMPABLE

The PR_DUMPABLE flag causes the pid related paths of the
proc file system to be owned by ROOT. The implementation
of pthread_set/getname_np however needs access to
/proc/<pid>/task/<tid>/comm.
If PR_DUMPABLE is false this implementation is locked out.

This patch installs a special permission function for
the file "comm" that grants read and write access to
all threads of the same group regardless of the ownership
of the inode. For all other threads the function falls back
to the generic inode permission check.

Change-Id: I52549463e2736cd233e77c5e6041d42c20691c73
Signed-off-by: Janis Danisevskis <jdanis@google.com>