From: sashiko-bot@kernel.org
To: "Tristan Madani" <tristmd@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH] USB: serial: sierra: validate URB length in instat callback
Date: Sun, 18 Oct 2026 22:40:20 +0000 [thread overview]
Message-ID: <sashiko-outbox-176431@kernel.org> (raw)
In-Reply-To: <20261018223352.2021650-1-tristmd@gmail.com>
> From: Tristan Madani <tristan@talencesecurity.com>
>
> sierra_instat_callback() reads one byte past the usb_ctrlrequest
> header at offset sizeof(struct usb_ctrlrequest) without first
> checking that urb->actual_length is large enough to contain it.
> A short USB interrupt transfer could cause an out-of-bounds read.
>
> Add a length check matching the pattern already present in the
> option driver (option_instat_callback), which validates the same
> field access.
>
> Fixes: 033a3fb980b041 ("USB: Sierra Wireless driver update")
> Cc: stable@vger.kernel.org
> Signed-off-by: Tristan Madani <tristan@talencesecurity.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261018223352.2021650-1-tristmd@gmail.com?part=1
next prev parent reply other threads:[~2026-10-18 22:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-18 22:33 [PATCH] USB: serial: sierra: validate URB length in instat callback Tristan Madani
2026-10-18 22:40 ` sashiko-bot [this message]
2026-10-19 6:41 ` Johan Hovold
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