From: sashiko-bot@kernel.org
To: "Jing Lin" <kayano050408@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH v5 3/3] usb: gadget: gadgetfs: avoid writing through the const setup pointer
Date: Mon, 09 Nov 2026 06:00:56 +0000 [thread overview]
Message-ID: <sashiko-outbox-204477@kernel.org> (raw)
In-Reply-To: <20261109-b4-gadgetfs-ep0-v5-3-f16d0b648bc2@gmail.com>
> From: Jing Lin <kayano050408@gmail.com>
>
> gadgetfs_setup() receives the setup packet as const, but clamps an
> oversized control IN request by casting away the constness and writing
> the truncated length back into the caller's wLength field.
>
> The setup() callback has no business modifying the setup packet. Use a
> local copy of the request for the clamped length instead. Userspace
> still observes the truncated wLength in the GADGETFS_SETUP event, and
> the queued request length is unchanged.
>
> Suggested-by: Alan Stern <stern@rowland.harvard.edu>
> Signed-off-by: Jing Lin <kayano050408@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261109-b4-gadgetfs-ep0-v5-0-f16d0b648bc2@gmail.com?part=3
prev parent reply other threads:[~2026-11-09 6:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 5:55 [PATCH v5 0/3] usb: gadget: gadgetfs: fix ep0 request lifetime and event counter Jing Lin
2026-11-09 5:55 ` Jing Lin via B4 Relay
2026-11-09 5:55 ` [PATCH v5 1/3] usb: gadget: gadgetfs: fix ep0 request lifetime on disconnect Jing Lin
2026-11-09 5:55 ` Jing Lin via B4 Relay
2026-11-09 6:16 ` sashiko-bot
2026-11-09 5:55 ` [PATCH v5 2/3] usb: gadget: gadgetfs: prevent ep0 event counter underflow Jing Lin
2026-11-09 5:55 ` Jing Lin via B4 Relay
2026-11-09 6:08 ` sashiko-bot
2026-11-09 5:55 ` [PATCH v5 3/3] usb: gadget: gadgetfs: avoid writing through the const setup pointer Jing Lin
2026-11-09 5:55 ` Jing Lin via B4 Relay
2026-11-09 6:00 ` sashiko-bot [this message]
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