From: Masami Hiramatsu (Google) Date: Mon, 1 Jun 2026 14:35:21 +0000 (+0900) Subject: tracing/probes: Ensure the uprobe buffer size is bigger than event size X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=4304c8165281fe730b6861d37a30b567d3c57832;p=thirdparty%2Fkernel%2Flinux.git tracing/probes: Ensure the uprobe buffer size is bigger than event size Add BUILD_BUG_ON() to ensure the uprobe per-CPU working buffer size is bigger than the event size. Link: https://lore.kernel.org/all/177849383209.8038.1902170479780501237.stgit@devnote2/ Signed-off-by: Masami Hiramatsu (Google) --- diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 2cabf8a23ec5c..c5ee7920dec63 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -979,6 +979,7 @@ static struct uprobe_cpu_buffer *prepare_uprobe_buffer(struct trace_uprobe *tu, ucb = uprobe_buffer_get(); ucb->dsize = tu->tp.size + dsize; + BUILD_BUG_ON(MAX_UCB_BUFFER_SIZE < MAX_PROBE_EVENT_SIZE); if (WARN_ON_ONCE(ucb->dsize > MAX_UCB_BUFFER_SIZE)) { ucb->dsize = MAX_UCB_BUFFER_SIZE; dsize = MAX_UCB_BUFFER_SIZE - tu->tp.size;