Merge branch 'work.memdup_user' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull memdup_user() conversions from Al Viro:
 "A fairly self-contained series - hunting down open-coded memdup_user()
  and memdup_user_nul() instances"

* 'work.memdup_user' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  bpf: don't open-code memdup_user()
  kimage_file_prepare_segments(): don't open-code memdup_user()
  ethtool: don't open-code memdup_user()
  do_ip_setsockopt(): don't open-code memdup_user()
  do_ipv6_setsockopt(): don't open-code memdup_user()
  irda: don't open-code memdup_user()
  xfrm_user_policy(): don't open-code memdup_user()
  ima_write_policy(): don't open-code memdup_user_nul()
  sel_write_validatetrans(): don't open-code memdup_user_nul()

1 files changed, 5 insertions, 7 deletions

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 9010a3632d6f..00eed842c491 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -649,14 +649,12 @@ static ssize_t sel_write_validatetrans(struct file *file,
 	if (*ppos != 0)
 		goto out;
 
-	rc = -ENOMEM;
-	req = kzalloc(count + 1, GFP_KERNEL);
-	if (!req)
-		goto out;
-
-	rc = -EFAULT;
-	if (copy_from_user(req, buf, count))
+	req = memdup_user_nul(buf, count);
+	if (IS_ERR(req)) {
+		rc = PTR_ERR(req);
+		req = NULL;
 		goto out;
+	}
 
 	rc = -ENOMEM;
 	oldcon = kzalloc(count + 1, GFP_KERNEL);