diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index f86be197f..630d15620 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -2234,6 +2234,7 @@ sg_remove_sfp_usercontext(struct work_struct *work)
 	SCSI_LOG_TIMEOUT(6, sg_printk(KERN_INFO, sdp,
 			"sg_remove_sfp: sfp=0x%p\n", sfp));
 	kfree(sfp);
+	sfp = NULL;
 
 	kref_put(&sdp->d_ref, sg_device_destroy);
 	scsi_device_put(device);