From: Ming Lei <ming.lei@xxxxxxxxxx> commit 11714026c02d613c30a149c3f4c4a15047744529 upstream. scsi_host_dev_release() only frees dev_name when host state is SHOST_CREATED. After host state has changed to SHOST_RUNNING, scsi_host_dev_release() no longer cleans up. Fix this by doing a put_device(&shost->shost_dev) in the failure path when host state is SHOST_RUNNING. Move get_device(&shost->shost_gendev) before device_add(&shost->shost_dev) so that scsi_host_cls_release() can do a put on this reference. Link: https://lore.kernel.org/r/20210602133029.2864069-4-ming.lei@xxxxxxxxxx Cc: Bart Van Assche <bvanassche@xxxxxxx> Cc: Hannes Reinecke <hare@xxxxxxx> Reported-by: John Garry <john.garry@xxxxxxxxxx> Tested-by: John Garry <john.garry@xxxxxxxxxx> Reviewed-by: John Garry <john.garry@xxxxxxxxxx> Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/hosts.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -254,12 +254,11 @@ int scsi_add_host_with_dma(struct Scsi_H device_enable_async_suspend(&shost->shost_dev); + get_device(&shost->shost_gendev); error = device_add(&shost->shost_dev); if (error) goto out_del_gendev; - get_device(&shost->shost_gendev); - if (shost->transportt->host_size) { shost->shost_data = kzalloc(shost->transportt->host_size, GFP_KERNEL); @@ -297,6 +296,11 @@ int scsi_add_host_with_dma(struct Scsi_H out_del_dev: device_del(&shost->shost_dev); out_del_gendev: + /* + * Host state is SHOST_RUNNING so we have to explicitly release + * ->shost_dev. + */ + put_device(&shost->shost_dev); device_del(&shost->shost_gendev); out_disable_runtime_pm: device_disable_async_suspend(&shost->shost_gendev);
