[PATCH 5.15.y 4/4] scsi: sd: fix missing put_disk() when device_add(&disk_dev) fails

[Sasha Levin <sashal@kernel.org>]

From: Yang Xiuwei <yangxiuwei@kylinos.cn>

[ Upstream commit 1e111c4b3a726df1254670a5cc4868cedb946d37 ]

If device_add(&sdkp->disk_dev) fails, put_device() runs
scsi_disk_release(), which frees the scsi_disk but leaves the gendisk
referenced. The device_add_disk() error path in sd_probe() calls
put_disk(gd); call put_disk(gd) here to mirror that cleanup.

Fixes: 265dfe8ebbab ("scsi: sd: Free scsi_disk device via put_device()")
Cc: stable@vger.kernel.org
Reviewed-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Yang Xiuwei <yangxiuwei@kylinos.cn>
Link: https://patch.msgid.link/20260330014952.152776-1-yangxiuwei@kylinos.cn
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/sd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 6c6cca6664c94..358354fe6c76f 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -3420,6 +3420,7 @@ static int sd_probe(struct device *dev)
 	error = device_add(&sdkp->disk_dev);
 	if (error) {
 		put_device(&sdkp->disk_dev);
+		put_disk(gd);
 		goto out;
 	}
 
-- 
2.53.0