When calling SG_GET_REQUEST_TABLE ioctl only a half-filled table is
returned; the remaining part will then contain stale kernel memory
information. This patch zeroes out the entire table to avoid this
issue.
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -839,7 +839,6 @@ sg_fill_request_table(Sg_fd *sfp, sg_req_info_t *rinfo)
list_for_each_entry(srp, &sfp->rq_list, entry) {
if (val > SG_MAX_QUEUE)
break;
- memset(&rinfo[val], 0, SZ_SG_REQ_INFO);
rinfo[val].req_state = srp->done + 1;
rinfo[val].problem =
srp->header.masked_status &
@@ -1047,8 +1046,8 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg)
else {
sg_req_info_t *rinfo;
- rinfo = kmalloc(SZ_SG_REQ_INFO * SG_MAX_QUEUE,
- GFP_KERNEL);
+ rinfo = kzalloc(SZ_SG_REQ_INFO * SG_MAX_QUEUE,
+ GFP_KERNEL);
if (!rinfo)
return -ENOMEM;
read_lock_irqsave(&sfp->rq_list_lock, iflags);
