linux-kernel - Re: [PATCH] block: Fix WARNING in _copy_from

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Date: Tue, 23 Jan 2024 08:57:01 -0700
From: Jens Axboe <axboe@...nel.dk>
To: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Christian A. Ehrhardt" <lk@...e.de>
Cc: syzbot+a532b03fdfee2c137666@...kaller.appspotmail.com, 
 syzbot+63dec323ac56c28e644f@...kaller.appspotmail.com, 
 Andrew Morton <akpm@...ux-foundation.org>, 
 Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] block: Fix WARNING in _copy_from_iter

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