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Date: Fri, 29 May 2020 01:10:22 +0100
From: Al Viro <viro@...IV.linux.org.uk>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH 2/3] scsi_ioctl.c: switch SCSI_IOCTL_GET_IDLUN to copy_to_user()
From: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
drivers/scsi/scsi_ioctl.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index 8f3af87b6bb0..45d04b7b2643 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -211,18 +211,18 @@ static int scsi_ioctl_common(struct scsi_device *sdev, int cmd, void __user *arg
}
switch (cmd) {
- case SCSI_IOCTL_GET_IDLUN:
- if (!access_ok(arg, sizeof(struct scsi_idlun)))
+ case SCSI_IOCTL_GET_IDLUN: {
+ struct scsi_idlun v = {
+ .dev_id = (sdev->id & 0xff)
+ + ((sdev->lun & 0xff) << 8)
+ + ((sdev->channel & 0xff) << 16)
+ + ((sdev->host->host_no & 0xff) << 24),
+ .host_unique_id = sdev->host->unique_id
+ };
+ if (copy_to_user(arg, &v, sizeof(struct scsi_idlun)))
return -EFAULT;
-
- __put_user((sdev->id & 0xff)
- + ((sdev->lun & 0xff) << 8)
- + ((sdev->channel & 0xff) << 16)
- + ((sdev->host->host_no & 0xff) << 24),
- &((struct scsi_idlun __user *)arg)->dev_id);
- __put_user(sdev->host->unique_id,
- &((struct scsi_idlun __user *)arg)->host_unique_id);
return 0;
+ }
case SCSI_IOCTL_GET_BUS_NUMBER:
return put_user(sdev->host->host_no, (int __user *)arg);
case SCSI_IOCTL_PROBE_HOST:
--
2.11.0
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