linux-kernel - Re: [PATCH v2] tracing/dma: Cap dma_map_sg tracepoint arrays to prevent buffer overflow

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Message-ID: <20260130115735.432be761@gandalf.local.home>
Date: Fri, 30 Jan 2026 11:57:35 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Sean Anderson <sean.anderson@...ux.dev>
Cc: Deepanshu Kartikey <kartikey406@...il.com>, mhiramat@...nel.org,
 mathieu.desnoyers@...icios.com, ptesarik@...e.com,
 m.szyprowski@...sung.com, jgg@...pe.ca, leon@...nel.org, kbusch@...nel.org,
 linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 syzbot+28cea38c382fd15e751a@...kaller.appspotmail.com
Subject: Re: [PATCH v2] tracing/dma: Cap dma_map_sg tracepoint arrays to
 prevent buffer overflow

On Fri, 30 Jan 2026 11:27:47 -0500
Sean Anderson <sean.anderson@...ux.dev> wrote:

> Reviwed-by: Sean Anderson <sean.anderson@...ux.dev>
> 
> Although it's a bit unusual that there's no limit on dynamic arrays like there is for %*ph.

Dynamic arrays are done in fast paths. I rather not add an extra branch to
test cases where its most likely not going to exceed the limit.

-- Steve