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From: Greg KH <gregkh@linuxfoundation.org>
To: "Марк Коренберг" <socketpair@gmail.com>
Cc: Mike Christie <mchristi@redhat.com>,
	stable@vger.kernel.org, Nicholas Bellinger <nab@linux-iscsi.org>
Subject: Re: Integer overflow in target_core_device.c in Linux Kernel
Date: Fri, 22 Apr 2016 11:08:14 +0900	[thread overview]
Message-ID: <20160422020814.GA14159@kroah.com> (raw)
In-Reply-To: <CAEmTpZGWqmSgxxExd7e-VSQeCvsF=EKz_7EWQ0nuju7N+yG2Fw@mail.gmail.com>

On Fri, Apr 22, 2016 at 03:13:58AM +0500, Марк Коренберг wrote:
> Linux kernel commit 8a9ebe717a133ba7bc90b06047f43cc6b8bcb8b3
> 
> attrib->max_unmap_lba_count = (q->limits.max_discard_sectors << 9)
> 
> Since max_discard_sectors is 32-bit, there may be integer overflow,
> making wrong max_unmap_lba_count.
> 
> For example, LVM Thin provisioning reports that it have 16 GB maximal
> discard block.
> 
> Exactly the same bug in DRBD9, I have already reported.

Please report this to the mailing list for the subsystem, stable@
doesn't care about stuff like this until it is resolved.

thanks,

greg k-h

      reply	other threads:[~2016-04-22  2:08 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-21 22:13 Integer overflow in target_core_device.c in Linux Kernel Марк Коренберг
2016-04-22  2:08 ` Greg KH [this message]

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