On Tue, Apr 28, 2015 at 09:06:03AM +0800, Qu Wenruo wrote:
> Old csum type check is wrong and can't catch csum_type 1(not supported).
>
> Fix it to avoid hostile 0 division.
>
> Reported-by: Lukas Lueg <lukas.lueg@xxxxxxxxx>
> Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxx>
> --- a/fs/btrfs/disk-io.c
> +++ b/fs/btrfs/disk-io.c
> @@ -428,7 +428,7 @@ static int btrfs_check_super_csum(char *raw_disk_sb)
>
> if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
> printk(KERN_ERR "BTRFS: unsupported checksum algorithm %u\n",
> - csum_type);
> + csum_type);
Please avoid unrelated changes.
> ret = 1;
> }
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