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| author | Ming Lei <ming.lei@redhat.com> | 2021-06-02 21:30:28 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-16 11:59:45 +0200 |
| commit | e694ddc8f3dea68491bda88e90592f63041d398f (patch) | |
| tree | 0507d44963edc77f90102fd51f2829902d0a8ea0 | |
| parent | fe7bcd794a533d35197cd8bad3e6b622f9f73f81 (diff) | |
| download | linux-stable-e694ddc8f3dea68491bda88e90592f63041d398f.tar.gz linux-stable-e694ddc8f3dea68491bda88e90592f63041d398f.tar.bz2 linux-stable-e694ddc8f3dea68491bda88e90592f63041d398f.zip | |
scsi: core: Put .shost_dev in failure path if host state changes to RUNNING
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>
| -rw-r--r-- | drivers/scsi/hosts.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index 97ac09dc12f1..3689b5e6afd5 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -253,12 +253,11 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev, 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); @@ -294,6 +293,11 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev, 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); |