linux-kernel - Re: [PATCH] net: nfc: Fix NULL dereference on nfc_llcp_build

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Date:   Wed, 27 Feb 2019 12:49:36 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     yuehaibing@...wei.com
Cc:     sameo@...ux.intel.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: [PATCH] net: nfc: Fix NULL dereference on nfc_llcp_build_tlv
 fails

From: Yue Haibing <yuehaibing@...wei.com>
Date: Fri, 22 Feb 2019 15:37:58 +0800

> From: YueHaibing <yuehaibing@...wei.com>
> 
> KASAN report this:
 . ..
> nfc_llcp_build_tlv will return NULL on fails, caller should check it,
> otherwise will trigger a NULL dereference.
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Fixes: eda21f16a5ed ("NFC: Set MIU and RW values from CONNECT and CC LLCP frames")
> Fixes: d646960f7986 ("NFC: Initial LLCP support")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Applied and queued up for -stable, thanks.