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Tue, 14 Apr 2026 02:47:09 -0700 (PDT) Received: from [192.168.88.32] ([216.128.11.125]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488ede1513csm42116795e9.2.2026.04.14.02.47.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Apr 2026 02:47:09 -0700 (PDT) Message-ID: Date: Tue, 14 Apr 2026 11:47:08 +0200 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net] net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete() To: Greg Kroah-Hartman , linux-usb@vger.kernel.org, netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , stable References: <2026041134-dreamboat-buddhism-d1ec@gregkh> Content-Language: en-US From: Paolo Abeni In-Reply-To: <2026041134-dreamboat-buddhism-d1ec@gregkh> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 4/11/26 1:01 PM, Greg Kroah-Hartman wrote: > A malicious USB device claiming to be a CDC Phonet modem can overflow > the skb_shared_info->frags[] array by sending an unbounded sequence of > full-page bulk transfers. > > Drop the skb and increment the length error when the frag limit is > reached. This matches the same fix that commit f0813bcd2d9d ("net: > wwan: t7xx: fix potential skb->frags overflow in RX path") did for the > t7xx driver. > > Cc: Andrew Lunn > Cc: "David S. Miller" > Cc: Eric Dumazet > Cc: Jakub Kicinski > Cc: Paolo Abeni > Cc: stable > Assisted-by: gregkh_clanker_t1000 > Signed-off-by: Greg Kroah-Hartman It looks like the fixes tag should be: Fixes: 87cf65601e17 ("USB host CDC Phonet network interface driver") Right? /P