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-rw-r--r--src/fringe.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/fringe.c b/src/fringe.c
index 34bc5db06d1..85aa14da727 100644
--- a/src/fringe.c
+++ b/src/fringe.c
@@ -24,6 +24,7 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#include "lisp.h"
#include "frame.h"
+#include "ptr-bounds.h"
#include "window.h"
#include "dispextern.h"
#include "buffer.h"
@@ -1591,7 +1592,9 @@ If BITMAP already exists, the existing definition is replaced. */)
fb.dynamic = true;
xfb = xmalloc (sizeof fb + fb.height * BYTES_PER_BITMAP_ROW);
- fb.bits = b = (unsigned short *) (xfb + 1);
+ fb.bits = b = ((unsigned short *)
+ ptr_bounds_clip (xfb + 1, fb.height * BYTES_PER_BITMAP_ROW));
+ xfb = ptr_bounds_clip (xfb, sizeof *xfb);
memset (b, 0, fb.height);
j = 0;