arm64: dts: rockchip: update thermal config and add gpu's parameters for rk3368

[firefly-linux-kernel-4.4.55.git] / drivers / scsi / sg.c

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 503ab8b46c0b4e8a73d7e826ba1aaf3be1abd6b0..dedcff9cabb5c92835d2c7e72a477233bcbbc9a2 100644 (file)
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -592,6 +592,9 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos)
        sg_io_hdr_t *hp;
        unsigned char cmnd[SG_MAX_CDB_SIZE];
 
+       if (unlikely(segment_eq(get_fs(), KERNEL_DS)))
+               return -EINVAL;
+
        if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp)))
                return -ENXIO;
        SCSI_LOG_TIMEOUT(3, sg_printk(KERN_INFO, sdp,
@@ -652,7 +655,8 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos)
        else
                hp->dxfer_direction = (mxsize > 0) ? SG_DXFER_FROM_DEV : SG_DXFER_NONE;
        hp->dxfer_len = mxsize;
-       if (hp->dxfer_direction == SG_DXFER_TO_DEV)
+       if ((hp->dxfer_direction == SG_DXFER_TO_DEV) ||
+           (hp->dxfer_direction == SG_DXFER_TO_FROM_DEV))
                hp->dxferp = (char __user *)buf + cmd_size;
        else
                hp->dxferp = NULL;
@@ -1261,7 +1265,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma)
        }
 
        sfp->mmap_called = 1;
-       vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+       vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
        vma->vm_private_data = sfp;
        vma->vm_ops = &sg_mmap_vm_ops;
        return 0;
@@ -1759,6 +1763,10 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
                        return res;
 
                iov_iter_truncate(&i, hp->dxfer_len);
+               if (!iov_iter_count(&i)) {
+                       kfree(iov);
+                       return -EINVAL;
+               }
 
                res = blk_rq_map_user_iov(q, rq, md, &i, GFP_ATOMIC);
                kfree(iov);