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Re: [Qemu-devel] [PATCH V9 4/4] blockdev: Add infinite loop check in dri
From: |
Jeff Cody |
Subject: |
Re: [Qemu-devel] [PATCH V9 4/4] blockdev: Add infinite loop check in drive_init() |
Date: |
Thu, 19 Dec 2013 12:25:59 -0500 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, Nov 26, 2013 at 01:38:33AM -0500, Xu Wang wrote:
> Check the backing file for a loop during image boot, to avoid a lack or
> response or segfault.
>
> Signed-off-by: Xu Wang <address@hidden>
> ---
> blockdev.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/blockdev.c b/blockdev.c
> index 330aa4a..e39fc27 100644
> --- a/blockdev.c
> +++ b/blockdev.c
> @@ -511,6 +511,13 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
>
> bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
>
> + /* Add backing file loop check */
> + if (!bdrv_backing_chain_okay(file, drv, NULL, &error)) {
> + error_setg(errp, "drive_init: backing file loop check failed. %s",
> + error_get_pretty(error));
Leaks error.
> + goto err;
> + }
> +
> QINCREF(bs_opts);
> ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error);
>
> --
> 1.8.1.4
>
>
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