6.6-stable review patch. If anyone has any objections, please let me know.
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From: Masami Hiramatsu (Google) mhiramat@kernel.org
commit 456c32e3c4316654f95f9d49c12cbecfb77d5660 upstream.
Since dynamic_events interface on tracefs is compatible with kprobe_events and uprobe_events, it should also check the lockdown status and reject if it is set.
Link: https://lore.kernel.org/all/175824455687.45175.3734166065458520748.stgit@dev...
Fixes: 17911ff38aa5 ("tracing: Add locked_down checks to the open calls of files created for tracefs") Signed-off-by: Masami Hiramatsu (Google) mhiramat@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/trace/trace_dynevent.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/kernel/trace/trace_dynevent.c +++ b/kernel/trace/trace_dynevent.c @@ -239,6 +239,10 @@ static int dyn_event_open(struct inode * { int ret;
+ ret = security_locked_down(LOCKDOWN_TRACEFS); + if (ret) + return ret; + ret = tracing_check_open_get_tr(NULL); if (ret) return ret;