From: Markus Elfring <Markus.Elfring@web.de>
To: Dan Carpenter <error27@gmail.com>, netdev@vger.kernel.org
Cc: "Andrew Lunn" <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"MD Danish Anwar" <danishanwar@ti.com>,
"Michael Grzeschik" <mgr@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Uwe Kleine-König" <u.kleine-koenig@baylibre.com>,
"Vadim Fedorenko" <vadim.fedorenko@linux.dev>,
"Yibo Dong" <dong100@mucse.com>,
LKML <linux-kernel@vger.kernel.org>,
kernel-janitors@vger.kernel.org
Subject: Re: [PATCH net] net: rnpgbe: Pass an expression directly in rnpgbe_rm_adapter()
Date: Mon, 13 Jul 2026 10:22:06 +0200 [thread overview]
Message-ID: <8110bb3f-70d9-4f0f-82f2-ffe1262b2962@web.de> (raw)
In-Reply-To: <alScHkiC3EmGzOlI@stanley.mountain>
>> The address of a data structure member was determined before
>> a corresponding null pointer check in the implementation of
>> the function “rnpgbe_rm_adapter”.
>>
>> Thus avoid the risk for undefined behaviour by omitting the variable “hw”.
>> Pass the required address directly to a function call.
>>
>> This issue was detected by using the Coccinelle software.
>>
>> Fixes: 2ee95ec17e97c58b65e978a08b75fa8cb6424e4e ("net: rnpgbe: Add register_netdev")
>
> There is no NULL dereference here. It's just pointer math.
> No need for a Fixes tag.
How does your view fit to information in an article like “Fun with NULL pointers, part 1”(by Jonathan Corbet from 2009-07-20)?
https://lwn.net/Articles/342330/
Regards,
Markus
prev parent reply other threads:[~2026-07-13 8:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-12 18:35 [PATCH net] net: rnpgbe: Pass an expression directly in rnpgbe_rm_adapter() Markus Elfring
2026-07-12 22:19 ` Vadim Fedorenko
2026-07-13 6:00 ` Markus Elfring
2026-07-13 8:04 ` [PATCH net] " Dan Carpenter
2026-07-13 8:22 ` Markus Elfring [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=8110bb3f-70d9-4f0f-82f2-ffe1262b2962@web.de \
--to=markus.elfring@web.de \
--cc=andrew+netdev@lunn.ch \
--cc=danishanwar@ti.com \
--cc=davem@davemloft.net \
--cc=dong100@mucse.com \
--cc=edumazet@google.com \
--cc=error27@gmail.com \
--cc=kernel-janitors@vger.kernel.org \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mgr@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=u.kleine-koenig@baylibre.com \
--cc=vadim.fedorenko@linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox