From: Johannes Berg <johannes@sipsolutions.net>
To: Ranganath V N <vnranganath.20@gmail.com>,
dave.taht@bufferbloat.net, linville@tuxdriver.com
Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
skhan@linuxfoundation.org, david.hunter.linux@gmail.com,
khalid@kernel.org,
syzbot+878ddc3962f792e9af59@syzkaller.appspotmail.com
Subject: Re: [PATCH v3] wifi: cfg80211: Fix uninitialized header access in cfg80211_classify8021d
Date: Wed, 19 Nov 2025 10:09:13 +0100 [thread overview]
Message-ID: <fb7ef6bcbfed2e98cd8266325e681f30873a3784.camel@sipsolutions.net> (raw)
In-Reply-To: <20251118150524.7973-1-vnranganath.20@gmail.com> (sfid-20251118_160541_358917_4D21AEC7)
On Tue, 2025-11-18 at 20:35 +0530, Ranganath V N wrote:
>
> switch (skb->protocol) {
> case htons(ETH_P_IP):
> + struct iphdr iph, *ip;
> +
> + ip = skb_header_pointer(skb, sizeof(struct ethhdr),
> + sizeof(*ip), &iph);
> + if (!ip)
> + return 0;
> +
> dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
If you pull it out that way, seems you should also _use_ it?
johannes
next prev parent reply other threads:[~2025-11-19 9:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-18 15:05 Ranganath V N
2025-11-19 9:09 ` Johannes Berg [this message]
2025-11-19 14:49 ` kernel test robot
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