diff --git a/fs/locks.c b/fs/locks.c
index e663aea..e390bd9 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -389,18 +389,6 @@
 	fl->fl_ops = NULL;
 	fl->fl_lmops = NULL;
 
-	/* Ensure that fl->fl_filp has compatible f_mode */
-	switch (l->l_type) {
-	case F_RDLCK:
-		if (!(filp->f_mode & FMODE_READ))
-			return -EBADF;
-		break;
-	case F_WRLCK:
-		if (!(filp->f_mode & FMODE_WRITE))
-			return -EBADF;
-		break;
-	}
-
 	return assign_type(fl, l->l_type);
 }
 
@@ -2034,6 +2022,22 @@
 	return error;
 }
 
+/* Ensure that fl->fl_filp has compatible f_mode for F_SETLK calls */
+static int
+check_fmode_for_setlk(struct file_lock *fl)
+{
+	switch (fl->fl_type) {
+	case F_RDLCK:
+		if (!(fl->fl_file->f_mode & FMODE_READ))
+			return -EBADF;
+		break;
+	case F_WRLCK:
+		if (!(fl->fl_file->f_mode & FMODE_WRITE))
+			return -EBADF;
+	}
+	return 0;
+}
+
 /* Apply the lock described by l to an open file descriptor.
  * This implements both the F_SETLK and F_SETLKW commands of fcntl().
  */
@@ -2071,6 +2075,10 @@
 	if (error)
 		goto out;
 
+	error = check_fmode_for_setlk(file_lock);
+	if (error)
+		goto out;
+
 	/*
 	 * If the cmd is requesting file-private locks, then set the
 	 * FL_OFDLCK flag and override the owner.
@@ -2206,6 +2214,10 @@
 	if (error)
 		goto out;
 
+	error = check_fmode_for_setlk(file_lock);
+	if (error)
+		goto out;
+
 	/*
 	 * If the cmd is requesting file-private locks, then set the
 	 * FL_OFDLCK flag and override the owner.