Merge tag 'renesas-soc2-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index c3764dd..1142127 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -4133,6 +4133,17 @@ 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_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) {
+               btrfs_err(fs_info, "bytes_used is too small %llu",
+                      btrfs_super_bytes_used(sb));
+               ret = -EINVAL;
+       }
+       if (!is_power_of_2(btrfs_super_stripesize(sb)) ||
+           btrfs_super_stripesize(sb) != sectorsize) {
+               btrfs_err(fs_info, "invalid stripesize %u",
+                      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));