-
由 Yu Kuai 提交于
mainline inclusion from mainline-v6.3-rc6 commit 3723091e category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7F7J3 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.4-rc7&id=3723091ea1884d599cc8b8bf719d6f42e8d4d8b1 -------------------------------- Currently if disk_scan_partitions() failed, GD_NEED_PART_SCAN will still set, and partition scan will be proceed again when blkdev_get_by_dev() is called. However, this will cause a problem that re-assemble partitioned raid device will creat partition for underlying disk. Test procedure: mdadm -CR /dev/md0 -l 1 -n 2 /dev/sda /dev/sdb -e 1.0 sgdisk -n 0:0:+100MiB /dev/md0 blockdev --rereadpt /dev/sda blockdev --rereadpt /dev/sdb mdadm -S /dev/md0 mdadm -A /dev/md0 /dev/sda /dev/sdb Test result: underlying disk partition and raid partition can be observed at the same time Note that this can still happen in come corner cases that GD_NEED_PART_SCAN can be set for underlying disk while re-assemble raid device. Fixes: e5cfefa9 ("block: fix scan partition for exclusively open device again") Reviewed-by: NJan Kara <jack@suse.cz> Reviewed-by: NMing Lei <ming.lei@redhat.com> Signed-off-by: NYu Kuai <yukuai3@huawei.com> Signed-off-by: NJens Axboe <axboe@kernel.dk> Conflicts: block/genhd.c Signed-off-by: NLi Lingfeng <lilingfeng3@huawei.com>
dfb92883