Oh Dave, I got to use a wrong email address of yours and got some failures.
Thanks,
-liubo
On Mon, May 02, 2016 at 11:15:50AM -0700, Liu Bo wrote:
> This adds valid checks for super_total_bytes, super_bytes_used and
> super_stripesize.
>
> Reported-by: Vegard Nossum <vegard.nos...@oracle.com>
> Reported-by: Quentin Casasnovas <quentin.casasno...@oracle.com>
> Signed-off-by: Liu Bo <bo.li....@oracle.com>
> ---
> fs/btrfs/disk-io.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
> index 4e47849..988d03f 100644
> --- a/fs/btrfs/disk-io.c
> +++ b/fs/btrfs/disk-io.c
> @@ -4120,6 +4120,20 @@ static int btrfs_check_super_valid(struct
> btrfs_fs_info *fs_info,
> * Hint to catch really bogus numbers, bitflips or so, more exact
> checks are
> * done later
> */
> + if (btrfs_super_total_bytes(sb) == 0) {
> + printk(KERN_ERR "BTRFS: total bytes is zero\n");
> + ret = -EINVAL;
> + }
> + if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) {
> + printk(KERN_ERR "BTRFS: bytes_used is too small %llu\n",
> + btrfs_super_bytes_used(sb));
> + ret = -EINVAL;
> + }
> + if (btrfs_super_stripesize(sb) != 4096) {
> + printk(KERN_ERR "BTRFS: invalid stripesize %u\n",
> + btrfs_super_stripesize(sb));
> + ret = -EINVAL;
> + }
> if (btrfs_super_num_devices(sb) > (1UL << 31))
> printk(KERN_WARNING "BTRFS: suspicious number of devices:
> %llu\n",
> btrfs_super_num_devices(sb));
> --
> 2.5.5
>
> --
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