diff options
| -rw-r--r-- | drivers/md/bcache/super.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 6817ea46cf0a..b3601476f7dd 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -139,13 +139,17 @@ static const char *read_super(struct cache_sb *sb, struct block_device *bdev, if (bch_is_zero(sb->uuid, 16)) goto err; + sb->block_size = le16_to_cpu(s->block_size); + + err = "Superblock block size smaller than device block size"; + if (sb->block_size << 9 < bdev_logical_block_size(bdev)) + goto err; + switch (sb->version) { case BCACHE_SB_VERSION_BDEV: - sb->block_size = le16_to_cpu(s->block_size); sb->data_offset = BDEV_DATA_START_DEFAULT; break; case BCACHE_SB_VERSION_BDEV_WITH_OFFSET: - sb->block_size = le16_to_cpu(s->block_size); sb->data_offset = le64_to_cpu(s->data_offset); err = "Bad data offset"; |