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Revert "block: nbd: add sanity check for first_minor" 

This reverts commit b3fa499d72 which is
commit b1a811633f7321cf1ae2bb76a66805b7720e44c9 upstream.

The backport of this is reported to be causing some problems, so revert
this for now until they are worked out.

Link: https://lore.kernel.org/r/CACPK8XfUWoOHr-0RwRoYoskia4fbAbZ7DYf5wWBnv6qUnGq18w@mail.gmail.com
Reported-by: Joel Stanley <joel@jms.id.au>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Pavel Skripkin <paskripkin@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2021-09-16 10:17:11 +02:00
parent 5f3ecbf4d5
commit 541e757944
1 changed files with 0 additions and 10 deletions
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10
drivers/block/nbd.c
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@ -1744,17 +1744,7 @@ static int nbd_dev_add(int index)
refcount_set(&nbd->refs, 1);
INIT_LIST_HEAD(&nbd->list);
disk->major = NBD_MAJOR;
/* Too big first_minor can cause duplicate creation of
* sysfs files/links, since first_minor will be truncated to
* byte in __device_add_disk().
*/
disk->first_minor = index << part_shift;
if (disk->first_minor > 0xff) {
err = -EINVAL;
goto out_free_idr;
}
disk->fops = &nbd_fops;
disk->private_data = nbd;
sprintf(disk->disk_name, "nbd%d", index);