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| author | Chen Gang <gang.chen@asianux.com> | 2013-02-28 10:34:23 +0800 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-03-01 08:41:43 -0500 |
| commit | a72d9002f80bffd7e4c7d60e5a9caa0cddffe894 (patch) | |
| tree | 6182c152ac4dfc7227353096526318eed07267f6 | |
| parent | 087ffecdaa1875cc683a7a5bc0695b3ebfce3bad (diff) | |
| download | linux-stable-a72d9002f80bffd7e4c7d60e5a9caa0cddffe894.tar.gz linux-stable-a72d9002f80bffd7e4c7d60e5a9caa0cddffe894.tar.bz2 linux-stable-a72d9002f80bffd7e4c7d60e5a9caa0cddffe894.zip | |
xen/xen-blkback: preq.dev is used without initialized
If call xen_vbd_translate failed, the preq.dev will be not initialized.
Use blkif->vbd.pdevice instead (still better to print relative info).
Note that before commit 01c681d4c70d64cb72142a2823f27c4146a02e63
(xen/blkback: Don't trust the handle from the frontend.)
the value bogus, as it was the guest provided value from req->u.rw.handle
rather than the actual device.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| -rw-r--r-- | drivers/block/xen-blkback/blkback.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index de1f319f7bd7..6d1cc3df2ac6 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -904,7 +904,8 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, pr_debug(DRV_PFX "access denied: %s of [%llu,%llu] on dev=%04x\n", operation == READ ? "read" : "write", preq.sector_number, - preq.sector_number + preq.nr_sects, preq.dev); + preq.sector_number + preq.nr_sects, + blkif->vbd.pdevice); goto fail_response; } |