From: Niklas Cassel niklas.cassel@wdc.com
commit 132be62387c7a72a38872676c18b0dfae264adb8 upstream.
When jumping to the out_put_disk label, we will call put_disk(), which will trigger a call to disk_release(), which calls blk_put_queue().
Later in the cleanup code, we do blk_cleanup_queue(), which will also call blk_put_queue().
Putting the queue twice is incorrect, and will generate a KASAN splat.
Set the disk->queue pointer to NULL, before calling put_disk(), so that the first call to blk_put_queue() will not free the queue.
The second call to blk_put_queue() uses another pointer to the same queue, so this call will still free the queue.
Fixes: 85136c010285 ("lightnvm: simplify geometry enumeration") Signed-off-by: Niklas Cassel niklas.cassel@wdc.com Signed-off-by: Christoph Hellwig hch@lst.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/nvme/host/core.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3566,6 +3566,8 @@ static int nvme_alloc_ns(struct nvme_ctr
return 0; out_put_disk: + /* prevent double queue cleanup */ + ns->disk->queue = NULL; put_disk(ns->disk); out_unlink_ns: mutex_lock(&ctrl->subsys->lock);