From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEB411C8FB4; Wed, 16 Oct 2024 07:58:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729065538; cv=none; b=L4gZvAhnLVDbKhIV/nl5z+6SkhzkKJd10480LLyz/uCuhKvJSEE2WpwJXlYPtqD5KUr3zjvy/AKPI4f83Oa4x70kVcfFqo06bQeYh/CCX8cdTagb4QUfzz1pvbKIMtfV002QPGvaMbrtyi5GCKGLjLpxZCPYK56+SoZsYjIqDr4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729065538; c=relaxed/simple; bh=n0pe026KdxnnfOE+FlZrG1ssjrpyt5lw8jYLE7L82Oo=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=j7vPQy7hAjd9PcsRasCE972cyC5K347YOgS8RHQ7HSvWtfLq29Y/ivE9tCKu2uGXzUOCeAta9NKnE8v4zQJtTh6rrWS2AZJkobag4wFAzppmqW0PLIlOGzJo3nYhMs1GI1M7QZ3kFglR2uW0GaV/kbzcV2+wnwHTefMxwNAOw+k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=h58LQTSX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="h58LQTSX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F161CC4CEC5; Wed, 16 Oct 2024 07:58:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729065538; bh=n0pe026KdxnnfOE+FlZrG1ssjrpyt5lw8jYLE7L82Oo=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=h58LQTSXBO7TFxIcRIxyn7tPMldlpPkmAwe+whwRpjOWojf8K+wfGusrnQtpH8sUe efMlfgbA0UAMKqzMvCbkJvw36TbPC/yOFWsLgakqS+C1/oFmtuxkhcUYDJ5Rxe/wXF D1u0W6M0yJ+QpWgM0bn6p1+ou8fEoIsbSuUXEeoBlPTrd6pGN79JUaX6FLaR03J+wZ gnsuPHLVRPu8H5Qody9TwHMVm6/D+3Iqk95vK3BUeEAmb6bzwA2v6uPh6urPHg4dRh z+QL5I09eeChS5xImkWZVXJGu16lUVnbTcoiydISkG3GS7OmB3pJvGd6mgVBsK8xWP Ow1FFgnVgzCQA== Message-ID: Date: Wed, 16 Oct 2024 09:58:53 +0200 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] nfc/nci: Fix uninit-value issue in nci_ntf_packet To: Qianqiang Liu Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, syzbot+3f8fa0edaa75710cd66e@syzkaller.appspotmail.com References: <670ab923.050a0220.3e960.0029.GAE@google.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 12/10/2024 20:47, Qianqiang Liu wrote: > When an unsupported rf_tech_and_mode (0xe6) occurs in nci_rf_discover_ntf_packet, > the ntf.ntf_type may be assigned an uninitialized value. > > To resolve this, use the __GFP_ZERO flag when calling alloc_skb(), > ensuring that skb->data is properly initialized. > > Reported-by: syzbot+3f8fa0edaa75710cd66e@syzkaller.appspotmail.com > Closes: https://syzkaller.appspot.com/bug?extid=3f8fa0edaa75710cd66e > Tested-by: syzbot+3f8fa0edaa75710cd66e@syzkaller.appspotmail.com > Signed-off-by: Qianqiang Liu Do not attach (thread) your patchsets to some other threads (unrelated or older versions). This buries them deep in the mailbox and might interfere with applying entire sets. > --- > drivers/nfc/virtual_ncidev.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/nfc/virtual_ncidev.c b/drivers/nfc/virtual_ncidev.c > index 6b89d596ba9a..31da26287327 100644 > --- a/drivers/nfc/virtual_ncidev.c > +++ b/drivers/nfc/virtual_ncidev.c > @@ -117,7 +117,7 @@ static ssize_t virtual_ncidev_write(struct file *file, > struct virtual_nci_dev *vdev = file->private_data; > struct sk_buff *skb; > > - skb = alloc_skb(count, GFP_KERNEL); > + skb = alloc_skb(count, GFP_KERNEL | __GFP_ZERO); > if (!skb) > return -ENOMEM; Same comments as before: https://lore.kernel.org/all/20240803121817.383567-1-zhanghao1@kylinos.cn/ Respond to existing feedback, please. Best regards, Krzysztof