linux-kernel - Re: [PATCH 06/11] sysctl: Add size to register_net

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Message-ID: <f95b7489-8654-435c-bc74-da1eac479fba@kadam.mountain>
Date:   Wed, 21 Jun 2023 13:49:54 +0300
From:   Dan Carpenter <dan.carpenter@...aro.org>
To:     Joel Granados <j.granados@...sung.com>
Cc:     mcgrof@...nel.org, Jason Gunthorpe <jgg@...pe.ca>,
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Subject: Re: [PATCH 06/11] sysctl: Add size to register_net_sysctl function

On Wed, Jun 21, 2023 at 12:47:30PM +0300, Dan Carpenter wrote:
> The patchset doesn't include the actual interesting changes, just a
> bunch of mechanical prep work.
> 

I was wrong here, the patchset just hadn't all hit the mailing lists.
I can't apply this patchset to anything.  I tried linux-next, net, and
net-next.  So it's hard to review.

It looks like ensure_safe_net_sysctl() never got update to use
table_size...

You could easily write a static checker test to print a warning any time
that ->procname is checked for NULL.  I have attached a Smatch check.
You would need to added to check_list.h and recompile.

net/sysctl_net.c:130 ensure_safe_net_sysctl() warn: checking ->procname 'ent->procname'

regards,
dan carpenter


View attachment "check_checking_procname.c" of type "text/x-csrc" (482 bytes)