iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

vt/consolemap: do font sum unsigned

Browse Source 
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@suse.cz>
Link: https://lore.kernel.org/r/20210105120239.28031-7-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2021-01-05 13:02:34 +01:00 committed by Greg Kroah-Hartman
parent 7d7dec450a
commit 9777f8e60e
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/tty/vt/consolemap.c
View File

@ -495,7 +495,7 @@ con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
p2[unicode & 0x3f] = fontpos; p2[unicode & 0x3f] = fontpos;
p->sum += (fontpos << 20) + unicode; p->sum += (fontpos << 20U) + unicode;
return 0; return 0;
} }