This is a note to let you know that I've just added the patch titled
block: return -EBUSY when there are open partitions in blkdev_reread_part
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
block-return-ebusy-when-there-are-open-partitions-in.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4f7eb1151883b50e358339016b0410ddb1f315b1
Author: Christoph Hellwig <hch@xxxxxx>
Date: Wed Apr 21 18:05:02 2021 +0200
block: return -EBUSY when there are open partitions in blkdev_reread_part
[ Upstream commit 68e6582e8f2dc32fd2458b9926564faa1fb4560e ]
The switch to go through blkdev_get_by_dev means we now ignore the
return value from bdev_disk_changed in __blkdev_get. Add a manual
check to restore the old semantics.
Fixes: 4601b4b130de ("block: reopen the device in blkdev_reread_part")
Reported-by: Karel Zak <kzak@xxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Link: https://lore.kernel.org/r/20210421160502.447418-1-hch@xxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/block/ioctl.c b/block/ioctl.c
index 3be4d0e2a96c..ed240e170e14 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -98,6 +98,8 @@ static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
+ if (bdev->bd_part_count)
+ return -EBUSY;
/*
* Reopen the device to revalidate the driver state and force a
