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xen/blkback: Check device permissions before allowing OP_DISCARD
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Wed, 16 Jan 2013 16:33:52 +0000 (11:33 -0500)
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Fri, 7 Jun 2013 21:05:55 +0000 (17:05 -0400)
We need to make sure that the device is not RO or that
the request is not past the number of sectors we want to
issue the DISCARD operation for.

This fixes CVE-2013-2140.

Cc: stable@vger.kernel.org
Acked-by: Jan Beulich <JBeulich@suse.com>
Acked-by: Ian Campbell <Ian.Campbell@citrix.com>
[v1: Made it pr_warn instead of pr_debug]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
drivers/block/xen-blkback/blkback.c patch | blob | history

diff --cc drivers/block/xen-blkback/blkback.c
Simple merge
Pandora Kernel Repository