From: Paolo Bonzini <pbonzini@redhat.com>
To: Ben Hutchings <ben@decadent.org.uk>
Cc: stable@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, Petr Matousek <pmatouse@redhat.com>,
linux-scsi@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
James Bottomley <JBottomley@parallels.com>
Subject: Re: [PATCH stable 3/4] block: fail SCSI passthrough ioctls on partition devices
Date: Tue, 24 Jan 2012 13:56:10 +0100 [thread overview]
Message-ID: <4F1EAA6A.6020207@redhat.com> (raw)
In-Reply-To: <1326902676.3271.10.camel@deadeye>
On 01/18/2012 05:04 PM, Ben Hutchings wrote:
> > There is harm. You'll be blacklisting also the standard block device
> > ioctls, and those won't work on 32-on-64 anymore. A system with 32-bit
> > userland will likely not boot anymore.
>
> It does (yes, I tested that myself now). The standard block device
> ioctls are handled without calling the driver's compat_ioctl.
What about the non-compat path when done by non-root?
* Does BLKROSET still return EACCES when run by non-root and without
CAP_SYS_ADMIN? I suspect your patch is changing it to EINVAL.
* Does BLKFLSBUF work when run by non-root but with CAP_SYS_ADMIN?
Paolo
next prev parent reply other threads:[~2012-01-24 12:56 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-12 15:01 [PATCH v2 0/3] possible privilege escalation via SG_IO ioctl (CVE-2011-4127) Paolo Bonzini
2012-01-12 15:01 ` [PATCH v2 1/3] block: add and use scsi_blk_cmd_ioctl Paolo Bonzini
2012-01-12 15:01 ` [PATCH v2 2/3] block: fail SCSI passthrough ioctls on partition devices Paolo Bonzini
2012-01-14 23:43 ` Linus Torvalds
2012-01-14 23:43 ` Linus Torvalds
2012-01-14 23:43 ` Linus Torvalds
2012-01-16 8:51 ` Paolo Bonzini
2012-01-17 3:58 ` Ben Hutchings
2012-01-17 4:06 ` [PATCH stable 1/4] kernel.h: add printk_ratelimited and pr_<level>_rl Ben Hutchings
2012-01-17 4:06 ` [PATCH stable 2/4] block: add and use scsi_blk_cmd_ioctl Ben Hutchings
2012-01-17 4:07 ` [PATCH stable 3/4] block: fail SCSI passthrough ioctls on partition devices Ben Hutchings
2012-01-17 9:55 ` Paolo Bonzini
2012-01-18 4:47 ` Ben Hutchings
2012-01-18 9:00 ` Paolo Bonzini
2012-01-18 16:04 ` Ben Hutchings
2012-01-24 12:56 ` Paolo Bonzini [this message]
2012-01-26 0:19 ` Greg KH
2012-01-26 18:28 ` Greg KH
2012-01-17 4:07 ` [PATCH stable 4/4] dm: do not forward ioctls from logical volumes to the underlying device Ben Hutchings
2012-01-17 20:03 ` [PATCH v2 2/3] block: fail SCSI passthrough ioctls on partition devices Greg KH
2012-01-17 20:03 ` Greg KH
2012-01-12 15:01 ` [PATCH v2 3/3] dm: do not forward ioctls from logical volumes to the underlying device Paolo Bonzini
2012-01-16 1:04 ` [PATCH v2 0/3] possible privilege escalation via SG_IO ioctl (CVE-2011-4127) Douglas Gilbert
2012-01-16 8:54 ` Paolo Bonzini
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