5.15-stable review patch. If anyone has any objections, please let me know.
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From: Li Lingfeng lilingfeng3@huawei.com
[ Upstream commit 7777f47f2ea64efd1016262e7b59fab34adfb869 ]
Commit 1a721de8489f ("block: don't add or resize partition on the disk with GENHD_FL_NO_PART") prevented all operations about partitions on disks with GENHD_FL_NO_PART in blkpg_do_ioctl() since they are meaningless. However, it changed error code in some scenarios. So move checking GENHD_FL_NO_PART to bdev_add_partition() to eliminate impact.
Fixes: 1a721de8489f ("block: don't add or resize partition on the disk with GENHD_FL_NO_PART") Reported-by: Allison Karlitskaya allison.karlitskaya@redhat.com Closes: https://lore.kernel.org/all/CAOYeF9VsmqKMcQjo1k6YkGNujwN-nzfxY17N3F-CMikE1tY... Signed-off-by: Li Lingfeng lilingfeng3@huawei.com Reviewed-by: Yu Kuai yukuai3@huawei.com Link: https://lore.kernel.org/r/20240118130401.792757-1-lilingfeng@huaweicloud.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/ioctl.c | 2 -- block/partitions/core.c | 5 +++++ 2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/block/ioctl.c b/block/ioctl.c index 0a3cf9aeec7d..7a939c178660 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -20,8 +20,6 @@ static int blkpg_do_ioctl(struct block_device *bdev, struct blkpg_partition p; sector_t 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))) diff --git a/block/partitions/core.c b/block/partitions/core.c index 1ead8c001561..b6a941889bb4 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -463,6 +463,11 @@ int bdev_add_partition(struct gendisk *disk, int partno, sector_t start, goto out; }
+ if (disk->flags & GENHD_FL_NO_PART) { + ret = -EINVAL; + goto out; + } + if (partition_overlaps(disk, start, length, -1)) { ret = -EBUSY; goto out;