[PATCH 3.10 214/319] tty: vt, fix bogus division in csi_J

[Willy Tarreau]

From: Jiri Slaby <jslaby@xxxxxxx>

commit 42acfc6615f47e465731c263bee0c799edb098f2 upstream.

In csi_J(3), the third parameter of scr_memsetw (vc_screenbuf_size) is
divided by 2 inappropriatelly. But scr_memsetw expects size, not
count, because it divides the size by 2 on its own before doing actual
memset-by-words.

So remove the bogus division.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Petr PísaÅ? <ppisar@xxxxxxxxxx>
Fixes: f8df13e0a9 (tty: Clean console safely)
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Willy Tarreau <w@xxxxxx>
---
 drivers/tty/vt/vt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index ee51acd..5deddca 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1166,7 +1166,7 @@ static void csi_J(struct vc_data *vc, int vpar)
 			break;
 		case 3: /* erase scroll-back buffer (and whole display) */
 			scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
-				    vc->vc_screenbuf_size >> 1);
+				    vc->vc_screenbuf_size);
 			set_origin(vc);
 			if (CON_IS_VISIBLE(vc))
 				update_screen(vc);
-- 
2.8.0.rc2.1.gbe9624a