If the free space bitmap pointer is corrupted such that it lies outside of the number of blocks in the filesystem, print a message and fail the mount so the user can fix it offline. Signed-off-by: Bob Copeland <me@xxxxxxxxxxxxxxx> --- fs/omfs/inode.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c index bd4bf75..0af5d0a 100644 --- a/fs/omfs/inode.c +++ b/fs/omfs/inode.c @@ -509,6 +509,15 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent) goto out_brelse_bh2; } + if (sbi->s_bitmap_ino != ~0ULL && + sbi->s_bitmap_ino > sbi->s_num_blocks) { + printk(KERN_ERR "omfs: free space bitmap location is corrupt " + "(%llx, total blocks %llx)\n", + (unsigned long long) sbi->s_bitmap_ino, + (unsigned long long) sbi->s_num_blocks); + goto out_brelse_bh2; + } + ret = omfs_get_imap(sb); if (ret) goto out_brelse_bh2; -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html