From: sashiko-bot@kernel.org
To: "Jing Lin" <kayano050408@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH v8 4/4] usb: gadget: gadgetfs: avoid writing through the const setup pointer
Date: Tue, 10 Nov 2026 04:18:58 +0000 [thread overview]
Message-ID: <sashiko-outbox-206184@kernel.org> (raw)
In-Reply-To: <20261110-gadgetfs-ep0-v8-v8-4-8f90434574fe@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, and
> ctrl->wLength is only used afterwards when initializing event->u.setup.
> Store the clamped w_length into event->u.setup.wLength directly instead.
>
> 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/20261110-gadgetfs-ep0-v8-v8-0-8f90434574fe@gmail.com?part=4
next prev parent reply other threads:[~2026-11-10 4:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-10 4:13 [PATCH v8 0/4] usb: gadget: gadgetfs: fix ep0 request lifetime and event counter Jing Lin via B4 Relay
2026-11-10 4:13 ` Jing Lin
2026-11-10 4:13 ` [PATCH v8 1/4] usb: gadget: gadgetfs: fix ep0 request lifetime and buffer races Jing Lin via B4 Relay
2026-11-10 4:13 ` Jing Lin
2026-11-10 4:40 ` sashiko-bot
2026-11-10 4:13 ` [PATCH v8 2/4] usb: gadget: gadgetfs: fix ep0 setup abort and unbind state races Jing Lin via B4 Relay
2026-11-10 4:13 ` Jing Lin
2026-11-10 4:36 ` sashiko-bot
2026-11-10 4:13 ` [PATCH v8 3/4] usb: gadget: gadgetfs: prevent ep0 event counter underflow Jing Lin via B4 Relay
2026-11-10 4:13 ` Jing Lin
2026-11-10 4:34 ` sashiko-bot
2026-11-10 4:13 ` [PATCH v8 4/4] usb: gadget: gadgetfs: avoid writing through the const setup pointer Jing Lin via B4 Relay
2026-11-10 4:13 ` Jing Lin
2026-11-10 4:18 ` sashiko-bot [this message]
2026-11-10 22:49 ` [PATCH v8 0/4] usb: gadget: gadgetfs: fix ep0 request lifetime and event counter Alan Stern
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