6.12-stable review patch. If anyone has any objections, please let me know.
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From: Ming Lei ming.lei@redhat.com
[ Upstream commit 3051247e4faa32a3d90c762a243c2c62dde310db ]
The kobject for the queue, `disk->queue_kobj`, is initialized with a reference count of 1 via `kobject_init()` in `blk_register_queue()`. While `kobject_del()` is called during the unregister path to remove the kobject from sysfs, the initial reference is never released.
Add a call to `kobject_put()` in `blk_unregister_queue()` to properly decrement the reference count and fix the leak.
Fixes: 2bd85221a625 ("block: untangle request_queue refcounting from sysfs") Cc: Christoph Hellwig hch@lst.de Signed-off-by: Ming Lei ming.lei@redhat.com Link: https://lore.kernel.org/r/20250711083009.2574432-1-ming.lei@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/blk-sysfs.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 0e2520d929e1d..6a38f312e385c 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -868,4 +868,5 @@ void blk_unregister_queue(struct gendisk *disk) mutex_unlock(&q->sysfs_dir_lock);
blk_debugfs_remove(disk); + kobject_put(&disk->queue_kobj); }