From 30c4fdc3dcdd1f08876300711778d8b680d54b36 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Wed, 1 Jun 2022 15:25:44 +0900 Subject: scsi: sd_zbc: Prevent zone information memory leak Make sure to always free a scsi disk zone information, even for regular disks. This ensures that there is no memory leak, even in the case of a zoned disk changing type to a regular disk (e.g. with a reformat using the FORMAT WITH PRESET command or other vendor proprietary command). To do this, rename sd_zbc_clear_zone_info() to sd_zbc_free_zone_info() and remove sd_zbc_release_disk(). A call to sd_zbc_free_zone_info() is added to sd_zbc_read_zones() for drives for which sd_is_zoned() returns false. Furthermore, sd_zbc_free_zone_info() code make s sure that the sdkp rev_mutex is never used while not being initialized by gating the cleanup code with a a check on the zone_wp_update_buf field as it is never NULL when rev_mutex has been initialized. Link: https://lore.kernel.org/r/20220601062544.905141-3-damien.lemoal@opensource.wdc.com Reviewed-by: Johannes Thumshirn Reviewed-by: Christoph Hellwig Signed-off-by: Damien Le Moal Signed-off-by: Martin K. Petersen --- drivers/scsi/sd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi/sd.c') diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 856024c6852c..03e1379a44e8 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3580,7 +3580,7 @@ static void scsi_disk_release(struct device *dev) struct scsi_disk *sdkp = to_scsi_disk(dev); ida_free(&sd_index_ida, sdkp->index); - sd_zbc_release_disk(sdkp); + sd_zbc_free_zone_info(sdkp); put_device(&sdkp->device->sdev_gendev); free_opal_dev(sdkp->opal_dev); -- cgit v1.2.3-58-ga151