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tracing/probes: Ensure the uprobe buffer size is bigger than event size

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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) <mhiramat@kernel.org>
This commit is contained in:
Masami Hiramatsu (Google)
2026-06-01 23:35:21 +09:00
parent 85e0f27dd1
commit 4304c81652
1 changed files with 1 additions and 0 deletions
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kernel/trace/trace_uprobe.c
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@@ -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;