fs: fix do_lookup false negative

[cascardo/linux.git] / drivers / scsi / sg.c

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 2968c6b..78d6163 100644 (file)
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1686,14 +1686,9 @@ static int sg_start_req(Sg_request *srp, unsigned char *cmd)
                int len, size = sizeof(struct sg_iovec) * iov_count;
                struct iovec *iov;
 
-               iov = kmalloc(size, GFP_ATOMIC);
-               if (!iov)
-                       return -ENOMEM;
-
-               if (copy_from_user(iov, hp->dxferp, size)) {
-                       kfree(iov);
-                       return -EFAULT;
-               }
+               iov = memdup_user(hp->dxferp, size);
+               if (IS_ERR(iov))
+                       return PTR_ERR(iov);
 
                len = iov_length(iov, iov_count);
                if (hp->dxfer_len < len) {