| commit | 1245800c0f96eb6ebb368593e251d66c01e61022 | [log] [tgz] |
|---|---|---|
| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | Fri Sep 23 22:57:13 2016 -0400 |
| committer | Steven Rostedt <rostedt@goodmis.org> | Sun Sep 25 10:27:08 2016 -0400 |
| tree | c945fb377258b480d806786d33fbd0f6ce118022 | |
| parent | c87edb36118664f1fa275107c1138b6f47793240 [diff] |
tracing: Move mutex to protect against resetting of seq data
The iter->seq can be reset outside the protection of the mutex. So can
reading of user data. Move the mutex up to the beginning of the function.
Fixes: d7350c3f45694 ("tracing/core: make the read callbacks reentrants")
Cc: stable@vger.kernel.org # 2.6.30+
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>