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Ehrhardt" Cc: syzbot+a532b03fdfee2c137666@syzkaller.appspotmail.com, syzbot+63dec323ac56c28e644f@syzkaller.appspotmail.com, Andrew Morton , Alexander Viro In-Reply-To: <20240121202634.275068-1-lk@c--e.de> References: <20240121202634.275068-1-lk@c--e.de> Subject: Re: [PATCH] block: Fix WARNING in _copy_from_iter Message-Id: <170602542154.1916499.2341274393906762651.b4-ty@kernel.dk> Date: Tue, 23 Jan 2024 08:57:01 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.12.5-dev-2aabd On Sun, 21 Jan 2024 21:26:34 +0100, Christian A. Ehrhardt wrote: > Syzkaller reports a warning in _copy_from_iter because an > iov_iter is supposedly used in the wrong direction. The reason > is that syzcaller managed to generate a request with > a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs > the kernel to copy user buffers into the kernel, read into > the copied buffers and then copy the data back to user space. > > [...] Applied, thanks! [1/1] block: Fix WARNING in _copy_from_iter commit: 13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 Best regards, -- Jens Axboe