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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-01-16 17:36:23 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-02-19 21:17:03 +0100 |
| commit | 01c681d4c70d64cb72142a2823f27c4146a02e63 (patch) | |
| tree | 42f55dc2338465760e4199a28ba677d960a09f7c /drivers/block/xen-blkback/blkback.c | |
| parent | xen-blkback: do not leak mode property (diff) | |
| download | linux-01c681d4c70d64cb72142a2823f27c4146a02e63.tar.xz linux-01c681d4c70d64cb72142a2823f27c4146a02e63.zip | |
xen/blkback: Don't trust the handle from the frontend.
The 'handle' is the device that the request is from. For the life-time
of the ring we copy it from a request to a response so that the frontend
is not surprised by it. But we do not need it - when we start processing
I/Os we have our own 'struct phys_req' which has only most essential
information about the request. In fact the 'vbd_translate' ends up
over-writing the preq.dev with a value from the backend.
This assignment of preq.dev with the 'handle' value is superfluous
so lets not do it.
Cc: stable@vger.kernel.org
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/block/xen-blkback/blkback.c')
| -rw-r--r-- | drivers/block/xen-blkback/blkback.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index 5ac841ff6cc7..1966a7cfd8ce 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -879,7 +879,6 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, goto fail_response; } - preq.dev = req->u.rw.handle; preq.sector_number = req->u.rw.sector_number; preq.nr_sects = 0; |