diff options
| author | Masami Ichikawa <masami256@gmail.com> | 2020-01-16 22:12:36 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-01-20 16:18:14 -0500 |
| commit | bf24daac8f2bd5b8affaec03c2be1d20bcdd6837 (patch) | |
| tree | 16b6d0565a085fced05d766e68c2fc503fc58447 /kernel/trace/trace_kprobe.c | |
| parent | 8bcebc77e85f3d7536f96845a0fe94b1dddb6af0 (diff) | |
| download | lwn-bf24daac8f2bd5b8affaec03c2be1d20bcdd6837.tar.gz lwn-bf24daac8f2bd5b8affaec03c2be1d20bcdd6837.zip | |
tracing: Do not set trace clock if tracefs lockdown is in effect
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: 17911ff38aa58 ("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>
Diffstat (limited to 'kernel/trace/trace_kprobe.c')
0 files changed, 0 insertions, 0 deletions