Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release

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To: Jann Horn <jannh@xxxxxxxxxx>
Subject: Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 10 Jul 2018 23:33:07 -0700
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, axboe@xxxxxxxxx, Douglas Gilbert <dgilbert@xxxxxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, fujita.tomonori@xxxxxxxxxxxxx, jejb@xxxxxxxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, kernel list <linux-kernel@xxxxxxxxxxxxxxx>, Kernel Hardening <kernel-hardening@xxxxxxxxxxxxxxxxxx>, security@xxxxxxxxxx
In-reply-to: <CAG48ez0ahgHZAEYHt_J_MAanRNX+PXN+2MwtR-VM=gm8Ym30kg@mail.gmail.com>
References: <20180615152335.208202-1-jannh@google.com> <20180615164009.GD30522@ZenIV.linux.org.uk> <90063ef3-68fa-e983-9b47-838e6076b0f4@interlog.com> <813e817b-bb2f-4a47-6225-9e39f19be278@kernel.dk> <20180621123431.GA558@infradead.org> <36a641db-fb1d-6c4c-7f1b-172f2b1cde32@kernel.dk> <20180708145840.GA22949@infradead.org> <CAG48ez0ahgHZAEYHt_J_MAanRNX+PXN+2MwtR-VM=gm8Ym30kg@mail.gmail.com>
User-agent: Mutt/1.9.2 (2017-12-15)

On Tue, Jul 10, 2018 at 01:53:02PM -0700, Jann Horn wrote:
> With the error messages like in my sg patch or like with Linus'
> proposed patch (https://lore.kernel.org/lkml/CA+55aFwg-2GP4ASTdd1pusmZkF7c8AN9febVDCaioDxzYJSLfw@xxxxxxxxxxxxxx/)
> applied?

I guess we should follows Linus' suggestions.

Note that he also seems to agree with me to just remove the read/write
interface.  Compared to sg bsg really is unused for the read/write
interface.  But lets get your fix in first..

References:
- [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
  - From: Jann Horn
- Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
  - From: Al Viro
- Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
  - From: Douglas Gilbert
- Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
  - From: Jens Axboe
- Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
  - From: Christoph Hellwig
- Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
  - From: Jens Axboe
- Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
  - From: Christoph Hellwig
- Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in release
  - From: Jann Horn

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