From: Andrew Lunn <andrew@lunn.ch>
To: Yousef Alhouseen <alhouseenyousef@gmail.com>
Cc: Petko Manolov <petkan@nucleusys.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
linux-usb@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
syzbot+9db6c624635564ad813c@syzkaller.appspotmail.com
Subject: Re: [PATCH net-next v4] net: usb: rtl8150: handle link status read failures
Date: Tue, 30 Jun 2026 15:48:11 +0200 [thread overview]
Message-ID: <355409c6-0b52-4dd5-9b0f-bdb72159ade4@lunn.ch> (raw)
In-Reply-To: <20260630101216.10365-1-alhouseenyousef@gmail.com>
On Tue, Jun 30, 2026 at 12:12:16PM +0200, Yousef Alhouseen wrote:
> set_carrier() ignores the result of the USB control transfer and tests
> the stack variable supplied as its receive buffer. If the device rejects
> or aborts the request, that variable remains uninitialized and the driver
> chooses an arbitrary carrier state.
>
> Leave the existing carrier state unchanged when the link status cannot be
> read. A transient USB error should not be treated as link loss.
>
> Reported-by: syzbot+9db6c624635564ad813c@syzkaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=9db6c624635564ad813c
> Suggested-by: Petko Manolov <petkan@nucleusys.com>
> Signed-off-by: Yousef Alhouseen <alhouseenyousef@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Andrew
prev parent reply other threads:[~2026-06-30 13:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-30 10:12 [PATCH net-next v4] net: usb: rtl8150: handle link status read failures Yousef Alhouseen
2026-06-30 13:48 ` Andrew Lunn [this message]
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