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authorYu Kuai <yukuai3@huawei.com>2023-03-07 18:55:52 +0800
committerJens Axboe <axboe@kernel.dk>2023-03-07 07:24:38 -0700
commit428913bce1e67ccb4dae317fd0332545bf8c9233 (patch)
tree879ff403638264c4ed3b5250b6f528a5660f77d9 /block
parentfe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff)
block: fix wrong mode for blkdev_put() from disk_scan_partitions()
If disk_scan_partitions() is called with 'FMODE_EXCL', blkdev_get_by_dev() will be called without 'FMODE_EXCL', however, follow blkdev_put() is still called with 'FMODE_EXCL', which will cause 'bd_holders' counter to leak. Fix the problem by using the right mode for blkdev_put(). Reported-by: syzbot+2bcc0d79e548c4f62a59@syzkaller.appspotmail.com Link: https://lore.kernel.org/lkml/f9649d501bc8c3444769418f6c26263555d9d3be.camel@linux.ibm.com/T/ Tested-by: Julian Ruess <julianr@linux.ibm.com> Fixes: e5cfefa97bcc ("block: fix scan partition for exclusively open device again") Signed-off-by: Yu Kuai <yukuai3@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/genhd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 3ee5577e1586..02d9cfb9e077 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -385,7 +385,7 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode)
if (IS_ERR(bdev))
ret = PTR_ERR(bdev);
else
- blkdev_put(bdev, mode);
+ blkdev_put(bdev, mode & ~FMODE_EXCL);
if (!(mode & FMODE_EXCL))
bd_abort_claiming(disk->part0, disk_scan_partitions);