Files
linux/kernel
Masami Ichikawa 07af0d03e8 tracing: Do not set trace clock if tracefs lockdown is in effect
commit bf24daac8f upstream.

When trace_clock option is not set and unstable clcok detected,
tracing_set_default_clock() sets trace_clock(ThinkPad A285 is one of
case). In that case, if lockdown is in effect, null pointer
dereference error happens in ring_buffer_set_clock().

Link: http://lkml.kernel.org/r/20200116131236.3866925-1-masami256@gmail.com

Cc: stable@vger.kernel.org
Fixes: 17911ff38a ("tracing: Add locked_down checks to the open calls of files created for tracefs")
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1788488
Signed-off-by: Masami Ichikawa <masami256@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-29 16:45:25 +01:00
..
2019-09-15 21:37:13 +02:00
2019-05-28 17:46:43 -04:00
2020-01-17 19:48:42 +01:00
2019-11-29 10:10:14 +01:00
2019-05-24 20:16:01 +02:00
2020-01-09 10:19:54 +01:00