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[209.132.180.67]) by mx.google.com with ESMTP id a195si30474585pfd.143.2018.11.21.02.12.42; Wed, 21 Nov 2018 02:12:57 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b="dBAF1ec/"; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728512AbeKUUpt (ORCPT + 99 others); Wed, 21 Nov 2018 15:45:49 -0500 Received: from mail-io1-f65.google.com ([209.85.166.65]:38641 "EHLO mail-io1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726016AbeKUUpt (ORCPT ); Wed, 21 Nov 2018 15:45:49 -0500 Received: by mail-io1-f65.google.com with SMTP id l14so3495506ioj.5 for ; Wed, 21 Nov 2018 02:11:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=sIhEzfzmVtc7JOHUaKshHMCch3YD98pZCL+beHOX75c=; b=dBAF1ec/qr6VRgYnpq6cUWHZT+K1UHbsqXJyQRilonT+xt0luIEAReySurFShiWFBC FcfUHotuQ6lMa32EOu+gkyaTcZ/ZzxJlZF7eVwR/dUoF14m2jI1hZNsv2PhgUzEblS/6 rLfbCW0obHmsWr81moi2JMwJvP4yriFJHL2AqV1PC5S+HvzWVFy+GzDPGQAHjyGyNFvf il/wOxf1a3wLzbMBLnE08od7hDjlD3Ymw7GhSdWjq4Li/vhlBXWrxnYpZG/RC3YcwzBV 69Ru2+rAHB5pXXZ7ol/GdgpN9zULz67MZd7FnHJOoZFIchLGEYr4t+ZhKnLYQtNmRYGb mCKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=sIhEzfzmVtc7JOHUaKshHMCch3YD98pZCL+beHOX75c=; b=rs/y0ojJGJT0d4Gk0uiLPRu9uVksG7OKvNYARE+S6HNhTJGNAreKO4bZ6SDLE822iy wTVFZ8F+mziesQIW1KWzTXj2gYE7XjFEiHo4xRlG9rMejpuTYu5g6qinwoA6TaH2fSV7 87VZGstvkmkyD/wXx4dkRgu226AEo8IADzwW69+ZaV2cns6cJvNY6tfAwCtWy81U91S8 ldrr3gMKXJOxAaukUk43ImEbXHj3oqCDJdkJoazMaBjoBHH4d5/jAmXkXvxEmAgrLI4M BO8Puz4pyxo8pqg9qIPwIn/J9hmN5H/SW2mltNOPMzIoG2XwQ+fCm2hEnTZCj4DFMzOa oTvQ== X-Gm-Message-State: AA+aEWZokYDcU4epTXyiazdoPIsij5ZsfCOeTDzRCxot/qAJphUIsVQT KO1ex8DNmUW5yKVnGS5h1FGDEVHH4d5t7Q41bks= X-Received: by 2002:a6b:8e90:: with SMTP id q138-v6mr4778326iod.112.1542795119081; Wed, 21 Nov 2018 02:11:59 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Kyungtae Kim Date: Wed, 21 Nov 2018 05:11:47 -0500 Message-ID: Subject: Re: BUG: unable to handle kernel NULL pointer dereference in write_port To: Arnd Bergmann Cc: gregkh@linuxfoundation.org, Byoungyoung Lee , DaeRyong Jeong , syzkaller@googlegroups.com, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thank you for your reply. But I think this kind of crash can occur in real PC as well, and I'm just thinking of some way to stop it in the first place (if possible). because malicious users can use this, so as to make the whole system (kernel) work incorrectly. Thanks, Kyungtae