/sys/class/scsi_disk/0:2:0:0/manage_start_stop can be changed to 0
unexpectly by writing invalid string.
Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>
---
drivers/scsi/sd.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index e653dc5..00c9837 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -231,11 +231,15 @@ manage_start_stop_store(struct device *dev, struct device_attribute *attr,
{
struct scsi_disk *sdkp = to_scsi_disk(dev);
struct scsi_device *sdp = sdkp->device;
+ bool v;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- sdp->manage_start_stop = simple_strtoul(buf, NULL, 10);
+ if (kstrtobool(buf, &v))
+ return -EINVAL;
+
+ sdp->manage_start_stop = v ? 1 : 0;
return count;
}
--
2.9.4
