From: Steven Rostedt <rostedt@goodmis.org>
To: Vincent Donnefort <vdonnefort@google.com>
Cc: mhiramat@kernel.org, linux-trace-kernel@vger.kernel.org,
mathieu.desnoyers@efficios.com, kernel-team@android.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v9 3/4] ring-buffer: Cap static ring buffer nr_pages
Date: Fri, 4 Sep 2026 10:02:45 -0400 [thread overview]
Message-ID: <20260904100245.245f7bdd@gandalf.local.home> (raw)
In-Reply-To: <aprB6OE1juuopC7q@google.com>
On Fri, 4 Sep 2026 14:04:40 +0100
Vincent Donnefort <vdonnefort@google.com> wrote:
> > If you want to add something, we could add to the beginning of this
> > function:
> >
> > /* Prevent ridiculously small sizes */
> > if (size < PAGE_SIZE)
> > return NULL;
> >
> > to shut up Sashiko about overflows :-p
> >
> > -- Steve
>
> tracer_alloc_buffers() uses size of 1 for non-expanded buffers.
>
> I'll test size just before
>
> nr_pages = (size - sizeof(struct ring_buffer_cpu_meta)) /
> (subbuf_size + sizeof(int));
>
Ack.
-- Steve
next prev parent reply other threads:[~2026-09-04 14:01 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 15:54 [PATCH v9 0/4] ring-buffer: Fixes for subbuf resizing and persistent buffers Vincent Donnefort
2026-09-01 15:54 ` [PATCH v9 1/4] ring-buffer: Allow splice reads on static buffers Vincent Donnefort
2026-09-03 18:26 ` Steven Rostedt
2026-09-01 15:54 ` [PATCH v9 2/4] tracing: Fix subbuf resize races with trace_pipe_raw readers Vincent Donnefort
2026-09-03 15:48 ` Steven Rostedt
2026-09-03 17:27 ` Vincent Donnefort
2026-09-01 15:54 ` [PATCH v9 3/4] ring-buffer: Cap static ring buffer nr_pages Vincent Donnefort
2026-09-01 16:35 ` sashiko-bot
2026-09-03 16:56 ` Steven Rostedt
2026-09-03 17:06 ` Vincent Donnefort
2026-09-03 17:33 ` Steven Rostedt
2026-09-04 13:04 ` Vincent Donnefort
2026-09-04 14:02 ` Steven Rostedt [this message]
2026-09-01 15:54 ` [PATCH v9 4/4] ring-buffer: Prevent truncation of nr_pages / nr_subbufs Vincent Donnefort
2026-09-01 16:48 ` sashiko-bot
2026-09-03 17:23 ` Steven Rostedt
2026-09-03 17:16 ` Steven Rostedt
2026-09-03 17:37 ` Vincent Donnefort
2026-09-03 18:17 ` Steven Rostedt
2026-09-03 14:31 ` [PATCH v9 0/4] ring-buffer: Fixes for subbuf resizing and persistent buffers Steven Rostedt
2026-09-03 15:19 ` Vincent Donnefort
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