This is the same issue that was fixed for the VGA text buffer in
commit 39cdb68c64d8 ("vt: fix memory overlapping when deleting chars
in the buffer"). The cure is also the same i.e. replace memcpy() with
memmove() due to the overlaping buffers.
Signed-off-by: Nicolas Pitre <nico@xxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
---
>From v1: spell out the actual change in the commit log.
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 156efda7c8..38a765eadb 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -381,7 +381,7 @@ static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr)
u32 *ln = vc->vc_uni_lines[vc->state.y];
unsigned int x = vc->state.x, cols = vc->vc_cols;
- memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln));
+ memmove(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln));
memset32(&ln[cols - nr], ' ', nr);
}
}
--
2.44.0
