From: Chen Gang Date: Thu, 28 Feb 2013 02:34:23 +0000 (+0800) Subject: xen/xen-blkback: preq.dev is used without initialized X-Git-Tag: firefly_0821_release~3680^2~814^2~9^2~9 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a72d9002f80bffd7e4c7d60e5a9caa0cddffe894;p=firefly-linux-kernel-4.4.55.git 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 Acked-by: Jan Beulich Signed-off-by: Konrad Rzeszutek Wilk --- 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; }