From: Ming Lei ming.lei@redhat.com
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@redhat.com Cc: Bart Van Assche bvanassche@acm.org Cc: Hannes Reinecke hare@suse.de Reported-by: John Garry john.garry@huawei.com Tested-by: John Garry john.garry@huawei.com Reviewed-by: John Garry john.garry@huawei.com Reviewed-by: Hannes Reinecke hare@suse.de Signed-off-by: Ming Lei ming.lei@redhat.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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);