linux-kernel - Re: [PATCH] staging: unisys: virtpci: virtpci: Fix for possible null pointer dereference

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Message-ID: <CAKXHbyM+DsL-L6sMNQJT7pCoPiDC=QUC4SAbiKw1CHSwQL44yg@mail.gmail.com>
Date:	Fri, 30 Jan 2015 18:02:29 +0100
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	Benjamin Romer <benjamin.romer@...sys.com>,
	David Kershner <david.kershner@...sys.com>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	Erik Arfvidson <erik.arfvidson@...sys.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	sparmaintainer@...sys.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: unisys: virtpci: virtpci: Fix for possible null
 pointer dereference

2015-01-30 13:59 GMT+01:00 Peter Hurley <peter@...leysoftware.com>:
> On 01/30/2015 07:39 AM, Dan Carpenter wrote:
>> Btw, if you have the smatch cross function database set up then you can
>> figure out this sort of thing by using:
>>
>> $ smdb.py virtpci_driver_attr_store
>>
>> It says that:
>>
>>      fs/sysfs/file.c |       sysfs_kf_write | (struct sysfs_ops)->store |  PARAM_VALUE |  0 | $ | 4096-2117777777777777777
>>
>> So this is called from sysfs_kf_write() and parameter zero is a valid
>> pointer.
>
> Hi Dan,
>
> This would be a good topic for an LWN.net article.
>
> Regards,
> Peter Hurley
>

Hi

Okay, I'll do that this weekend.

But I see with you more about Smatch by the way.

Kind regards
Rickard Strandqvist
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