3.16.85-rc1 review patch. If anyone has any objections, please let me know.
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From: Hannes Reinecke hare@suse.de
commit 3e0097499839e0fe3af380410eababe5a47c4cf9 upstream.
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.
Signed-off-by: Hannes Reinecke hare@suse.com Reviewed-by: Bart Van Assche bart.vanassche@wdc.com Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Eric Dumazet edumazet@google.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/scsi/sg.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -881,7 +881,6 @@ sg_fill_request_table(Sg_fd *sfp, sg_req 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 & @@ -1098,8 +1097,8 @@ sg_ioctl(struct file *filp, unsigned int 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);