From 0d41604d2d53c1abe27fefb54b37a8f6642a4d74 Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" Date: Fri, 19 Sep 2025 10:15:56 +0900 Subject: [PATCH] tracing: dynevent: Add a missing lockdown check on dynevent 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@devnote2/ Fixes: 17911ff38aa5 ("tracing: Add locked_down checks to the open calls of files created for tracefs") Signed-off-by: Masami Hiramatsu (Google) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- kernel/trace/trace_dynevent.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/trace/trace_dynevent.c b/kernel/trace/trace_dynevent.c index 6d0e9f869ad6..3d8ffa81a1fa 100644 --- a/kernel/trace/trace_dynevent.c +++ b/kernel/trace/trace_dynevent.c @@ -239,6 +239,10 @@ static int dyn_event_open(struct inode *inode, struct file *file) { int ret; + ret = security_locked_down(LOCKDOWN_TRACEFS); + if (ret) + return ret; + ret = tracing_check_open_get_tr(NULL); if (ret) return ret;