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-rw-r--r--fs/bfs/inode.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 1d2bfaf..cc4062d 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -390,6 +390,18 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
- le32_to_cpu(bfs_sb->s_start)) >> BFS_BSIZE_BITS;
info->si_freei = 0;
info->si_lf_eblk = 0;
+
+ /* can we read the last block? */
+ bh = sb_bread(s, info->si_blocks - 1);
+ if (!bh) {
+ printf("Last block not available: %lu\n", info->si_blocks - 1);
+ iput(inode);
+ ret = -EIO;
+ kfree(info->si_imap);
+ goto out;
+ }
+ brelse(bh);
+
bh = NULL;
for (i = BFS_ROOT_INO; i <= info->si_lasti; i++) {
struct bfs_inode *di;
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