From: Jakub Kicinski <kuba@kernel.org>
To: Jisoo Jang <jisoo.jang@yonsei.ac.kr>
Cc: linux-wireless@vger.kernel.org, linuxlovemin@yonsei.ac.kr,
dokyungs@yonsei.ac.kr
Subject: Re: [PATCH] wifi: mt7601u: fix an integer underflow
Date: Thu, 29 Dec 2022 17:18:16 -0800 [thread overview]
Message-ID: <20221229171816.42022e23@kernel.org> (raw)
In-Reply-To: <20221229092906.2328282-1-jisoo.jang@yonsei.ac.kr>
On Thu, 29 Dec 2022 18:29:06 +0900 Jisoo Jang wrote:
> Fix an integer underflow that leads to a null pointer dereference in
> 'mt7601u_rx_skb_from_seg()'. The variable 'dma_len' in the URB packet
> could be manipulated, which could trigger an integer underflow of
> 'seg_len' in 'mt7601u_rx_process_seg()'. This underflow subsequently
> causes the 'bad_frame' checks in 'mt7601u_rx_skb_from_seg()' to be
> bypassed, eventually leading to a dereference of the pointer 'p', which
> is a null pointer.
>
> Ensure that 'dma_len' is greater than 'min_seg_len'.
Acked-by: Jakub Kicinski <kuba@kernel.org>
next prev parent reply other threads:[~2022-12-30 1:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-29 9:29 [PATCH] wifi: mt7601u: fix an integer underflow Jisoo Jang
2022-12-30 1:18 ` Jakub Kicinski [this message]
2023-01-16 16:23 ` Kalle Valo
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