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From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: "Gustavo A. R. Silva" <garsilva-L1vi/lXTdts+Va1GwOuvDg@public.gmane.org>
Cc: tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH] char: tpm: fix potential null pointer dereference
Date: Tue, 30 May 2017 16:21:19 -0600	[thread overview]
Message-ID: <20170530222119.GA8643@obsidianresearch.com> (raw)
In-Reply-To: <20170530220520.GA8713@embeddedgus>

On Tue, May 30, 2017 at 05:05:20PM -0500, Gustavo A. R. Silva wrote:
> NULL check at line 376: if (!chip) {, implies chip might be NULL.
> Function dev_get_drvdata() dereference pointer chip.
> Move pointer tmp_dev assignment after the NULL check.

chip cannot be null in st33zp24_send, please remove the bogus if
instead.

Jason

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  reply	other threads:[~2017-05-30 22:21 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-30 22:05 [PATCH] char: tpm: fix potential null pointer dereference Gustavo A. R. Silva
2017-05-30 22:21 ` Jason Gunthorpe [this message]
2017-05-30 22:40   ` Gustavo A. R. Silva
2017-05-31  0:05     ` [PATCH] char: tpm: remove unnecessary code Gustavo A. R. Silva

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