From: weiping zhang zhangweiping@didichuxing.com
[ Upstream commit 623401ee33e42cee64d333877892be8db02951eb ]
/sys/class/scsi_disk/0:2:0:0/manage_start_stop can be changed to 0 unexpectly by writing an invalid string.
Signed-off-by: weiping zhang zhangweiping@didichuxing.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin alexander.levin@verizon.com --- 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 09fa1fd0c4ce..66e1c2ea79d7 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -234,11 +234,15 @@ 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;
return count; }