From: Jiri Slaby <jslaby@xxxxxxx> [ Upstream commit 9777f8e60e718f7b022a94f2524f967d8def1931 ] The constant 20 makes the font sum computation signed which can lead to sign extensions and signed wraps. It's not much of a problem as we build with -fno-strict-overflow. But if we ever decide not to, be ready, so switch the constant to unsigned. Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Link: https://lore.kernel.org/r/20210105120239.28031-7-jslaby@xxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/tty/vt/consolemap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c index b28aa0d289f89..251c02af1fc3e 100644 --- a/drivers/tty/vt/consolemap.c +++ b/drivers/tty/vt/consolemap.c @@ -495,7 +495,7 @@ con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos) p2[unicode & 0x3f] = fontpos; - p->sum += (fontpos << 20) + unicode; + p->sum += (fontpos << 20U) + unicode; return 0; } -- 2.27.0
