[PATCH 4.9 32/32] scsi: sg: fix minor memory leak in error path

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tony Battersby <tonyb@xxxxxxxxxxxxxxx>

commit c170e5a8d222537e98aa8d4fddb667ff7a2ee114 upstream.

Fix a minor memory leak when there is an error opening a /dev/sg device.

Fixes: cc833acbee9d ("sg: O_EXCL and other lock handling")
Cc: <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Ewan D. Milne <emilne@xxxxxxxxxx>
Signed-off-by: Tony Battersby <tonyb@xxxxxxxxxxxxxxx>
Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/scsi/sg.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -2185,6 +2185,7 @@ sg_add_sfp(Sg_device * sdp)
 	write_lock_irqsave(&sdp->sfd_lock, iflags);
 	if (atomic_read(&sdp->detaching)) {
 		write_unlock_irqrestore(&sdp->sfd_lock, iflags);
+		kfree(sfp);
 		return ERR_PTR(-ENODEV);
 	}
 	list_add_tail(&sfp->sfd_siblings, &sdp->sfds);