From c76f48eb5c084b1e15c931ae8cc1826cd771d70d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 6 Apr 2021 08:22:56 +0200 Subject: block: take bd_mutex around delete_partitions in del_gendisk There is nothing preventing an ioctl from trying do delete partition concurrenly with del_gendisk, so take open_mutex to serialize against that. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20210406062303.811835-6-hch@lst.de Signed-off-by: Jens Axboe --- block/genhd.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'block/genhd.c') diff --git a/block/genhd.c b/block/genhd.c index 8303ec67fd70..e3f3c2321773 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -680,7 +680,11 @@ void del_gendisk(struct gendisk *disk) * disk is marked as dead (GENHD_FL_UP cleared). */ down_write(&bdev_lookup_sem); + + mutex_lock(&disk->part0->bd_mutex); blk_drop_partitions(disk); + mutex_unlock(&disk->part0->bd_mutex); + fsync_bdev(disk->part0); __invalidate_device(disk->part0, true); -- cgit v1.2.3-70-g09d2