Oops in 2.5.44's fs/block_dev.c:do_open() when trying to mount a

[Luc Van Oostenryck]

Offending code is:
     663                 if (bdev->bd_invalidated)
     664                         rescan_partitions(disk, bdev);
     665         } else {
     666                 down(&bdev->bd_contains->bd_sem);
     667                 bdev->bd_contains->bd_part_count++;
     668                 if (!bdev->bd_openers) {
     669                         struct hd_struct *p;
     670                         p = disk->part + part - 1;
                                     ^^^^^^^^^^

                         this is NULL when the floppy is badly formatted

The problem is not present in 2.5.43, but is also present in 2.5.44-ac1

Luc Van Oostenryck