patch 8.0.1475: invalid memory access in read_redo()v8.0.1475

Problem:    Invalid memory access in read_redo(). (gy741)
Solution:   Convert the replacement character back from a negative number to
            CR or NL. (hint by Dominique Pelle, closes #2616)

1 files changed, 14 insertions, 5 deletions

diff --git a/src/ops.c b/src/ops.c
index 83c36bda6..1350d8264 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -2113,13 +2113,21 @@ op_replace(oparg_T *oap, int c)
     size_t		oldlen;
     struct block_def	bd;
     char_u		*after_p = NULL;
-    int			had_ctrl_v_cr = (c == -1 || c == -2);
+    int			had_ctrl_v_cr = FALSE;
 
     if ((curbuf->b_ml.ml_flags & ML_EMPTY ) || oap->empty)
 	return OK;	    /* nothing to do */
 
-    if (had_ctrl_v_cr)
-	c = (c == -1 ? '\r' : '\n');
+    if (c == REPLACE_CR_NCHAR)
+    {
+	had_ctrl_v_cr = TRUE;
+	c = CAR;
+    }
+    else if (c == REPLACE_NL_NCHAR)
+    {
+	had_ctrl_v_cr = TRUE;
+	c = NL;
+    }
 
 #ifdef FEAT_MBYTE
     if (has_mbyte)
@@ -2207,7 +2215,8 @@ op_replace(oparg_T *oap, int c)
 	    /* insert pre-spaces */
 	    vim_memset(newp + bd.textcol, ' ', (size_t)bd.startspaces);
 	    /* insert replacement chars CHECK FOR ALLOCATED SPACE */
-	    /* -1/-2 is used for entering CR literally. */
+	    /* REPLACE_CR_NCHAR/REPLACE_NL_NCHAR is used for entering CR
+	     * literally. */
 	    if (had_ctrl_v_cr || (c != '\r' && c != '\n'))
 	    {
 #ifdef FEAT_MBYTE
@@ -6370,7 +6379,7 @@ write_viminfo_registers(FILE *fp)
 	     * |{bartype},{flags},{name},{type},
 	     *      {linecount},{width},{timestamp},"line1","line2"
 	     * flags: REG_PREVIOUS - register is y_previous
-	     *        REG_EXEC - used for @@
+	     *	      REG_EXEC - used for @@
 	     */
 	    if (y_previous == &y_regs[i])
 		flags |= REG_PREVIOUS;