4.16-stable review patch. If anyone has any objections, please let me know.
------------------ From: Johannes Thumshirn <[email protected]> commit 2ee5671e3ae35e53bb5a53a89ac8f033e4b1721f upstream. Currently scsi_dh_lookup() doesn't check for NULL as a device name. This combined with nvme over dm-mpath results in the following messages emitted by device-mapper: device-mapper: multipath: Could not failover device 259:67: Handler scsi_dh_(null) error 14. Let scsi_dh_lookup() fail fast on NULL names. [mkp: typo fix] Cc: <[email protected]> # v4.16 Signed-off-by: Johannes Thumshirn <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Reviewed-by: Bart Van Assche <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/scsi/scsi_dh.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/scsi/scsi_dh.c +++ b/drivers/scsi/scsi_dh.c @@ -112,6 +112,9 @@ static struct scsi_device_handler *scsi_ { struct scsi_device_handler *dh; + if (!name || strlen(name) == 0) + return NULL; + dh = __scsi_dh_lookup(name); if (!dh) { request_module("scsi_dh_%s", name);
