From: Christoph Hellwig <hch@lst.de>
To: Bart Van Assche <bvanassche@acm.org>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Todd Aiken <taiken@mvtech.ca>,
Keith Busch <keith.busch@intel.com>,
Laurence Oberman <loberman@redhat.com>,
stable@vger.kernel.org
Subject: Re: [PATCH] block: Restore tape support
Date: Mon, 10 Dec 2018 12:17:29 +0100 [thread overview]
Message-ID: <20181210111729.GA21553@lst.de> (raw)
In-Reply-To: <20181210030814.13235-1-bvanassche@acm.org>
On Sun, Dec 09, 2018 at 07:08:14PM -0800, Bart Van Assche wrote:
> According to what I found in
> https://bugzilla.kernel.org/show_bug.cgi?id=201935 patch "block: Clear
> kernel memory before copying to user" broke tape access. Hence revert
> that patch.
This looks wrong. The patch from Keith is obviously correct for
normal usage of bio_copy_user_iov. The SCSI tape drivers use the
somewhat odd null_mapped case, so we probably need to refine the checks
for that a bit.
next prev parent reply other threads:[~2018-12-10 11:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-10 3:08 [PATCH] block: Restore tape support Bart Van Assche
2018-12-10 11:17 ` Christoph Hellwig [this message]
2018-12-10 15:11 ` Laurence Oberman
2018-12-10 15:32 ` Keith Busch
2018-12-10 15:36 ` Jens Axboe
2018-12-10 16:17 ` Laurence Oberman
2018-12-10 20:06 ` Laurence Oberman
2018-12-10 20:26 ` Keith Busch
2018-12-10 20:38 ` Todd Aiken
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