netdev - Re: [PATCH 1/2 net] ptp: fix error codes in ptp_clock

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Message-ID: <20170710093816.wz5uiqoyilgxmgh3@mwanda>
Date:   Mon, 10 Jul 2017 12:38:16 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     Ganesh Goudar <ganeshgr@...lsio.com>,
        Atul Gupta <atul.gupta@...lsio.com>, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/2 net] ptp: fix error codes in ptp_clock_register()

On Mon, Jul 10, 2017 at 11:21:03AM +0200, Richard Cochran wrote:
> On Mon, Jul 10, 2017 at 10:11:37AM +0300, Dan Carpenter wrote:
> > The ptp_clock_register() function returns NULL when it's #ifdefed out
> > because CONFIG_PTP_1588_CLOCK is disabled.  Otherwise, it's intended to
> > return error pointers.  Unfortunately, there are a couple paths where we
> > forget to set the error code.  It means that we could result in NULL
> > pointer dereferences in the callers.
> > 
> > Fixes: d94ba80ebbea ("ptp: Added a brand new class driver for ptp clocks.")
> 
> This "Fixes" tag references the wrong commit.  Please correct it.
> 

There were two buggy commits so I chose the ealier one.  The other buggy
commit is 85a66e550195 ("ptp: create "pins" together with the rest of
attributes").  I should have CC'd Dmitry as well.  I can resend.

regards,
dan carpenter