From: Paolo Abeni <pabeni@redhat.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, stable <stable@kernel.org>
Subject: Re: [PATCH net] net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()
Date: Tue, 14 Apr 2026 11:47:08 +0200 [thread overview]
Message-ID: <a3974cae-728d-4eb6-8bfa-f926ed1c49ce@redhat.com> (raw)
In-Reply-To: <2026041134-dreamboat-buddhism-d1ec@gregkh>
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 <andrew+netdev@lunn.ch>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Eric Dumazet <edumazet@google.com>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Paolo Abeni <pabeni@redhat.com>
> Cc: stable <stable@kernel.org>
> Assisted-by: gregkh_clanker_t1000
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It looks like the fixes tag should be:
Fixes: 87cf65601e17 ("USB host CDC Phonet network interface driver")
Right?
/P
next prev parent reply other threads:[~2026-04-14 9:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-11 11:01 [PATCH net] net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete() Greg Kroah-Hartman
2026-04-14 9:47 ` Paolo Abeni [this message]
2026-04-14 10:20 ` patchwork-bot+netdevbpf
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