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| author | Li Lingfeng <lilingfeng3@huawei.com> | 2023-08-31 10:59:00 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-08-31 17:00:35 +0300 |
| commit | 1a721de8489fa559ff4471f73c58bb74ac5580d3 (patch) | |
| tree | e1300f5ae99942348720ea7d8caff20962f1f8ef | |
| parent | 0d997f1de89970bff4be1b6f0142c0bd036c3ee8 (diff) | |
| download | linux-1a721de8489fa559ff4471f73c58bb74ac5580d3.tar.xz | |
block: don't add or resize partition on the disk with GENHD_FL_NO_PART
Commit a33df75c6328 ("block: use an xarray for disk->part_tbl") remove
disk_expand_part_tbl() in add_partition(), which means all kinds of
devices will support extended dynamic `dev_t`.
However, some devices with GENHD_FL_NO_PART are not expected to add or
resize partition.
Fix this by adding check of GENHD_FL_NO_PART before add or resize
partition.
Fixes: a33df75c6328 ("block: use an xarray for disk->part_tbl")
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230831075900.1725842-1-lilingfeng@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/ioctl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block/ioctl.c b/block/ioctl.c index 648670ddb164..d5f5cd61efd7 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -20,6 +20,8 @@ static int blkpg_do_ioctl(struct block_device *bdev, struct blkpg_partition p; long long start, length; + if (disk->flags & GENHD_FL_NO_PART) + return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (copy_from_user(&p, upart, sizeof(struct blkpg_partition))) |