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Date: Thu, 12 Mar 2026 19:38:46 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Minhong He <heminhong@kylinos.cn>
Cc: edumazet@google.com, andrea.mayer@uniroma2.it, davem@davemloft.net,
 david.lebrun@uclouvain.be, dsahern@kernel.org, horms@kernel.org,
 linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com
Subject: Re: [PATCH net v2] ipv6: sr: Add NULL check for idev in
 seg6_hmac_validate_skb
Message-ID: <20260312193846.59a2d5fd@kernel.org>
In-Reply-To: <20260313022634.51885-1-heminhong@kylinos.cn>
References: <CANn89iLBN-fxUQ11Txtn73XQ6M9mrpaWEfjK=EfMU8UO1yOdBw@mail.gmail.com>
	<20260313022634.51885-1-heminhong@kylinos.cn>
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On Fri, 13 Mar 2026 10:26:34 +0800 Minhong He wrote:
> In seg6_hmac_validate_skb(), the pointer returned by __in6_dev_get()
> can be NULL if the network device lacks proper IPv6 initialization
> or is being torn down. Add a NULL check to avoid potential NULL pointer
> dereference in subsequent code.

next time please start a new thread instead of replying to the previous
posting please.