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fbcon: Use array3_size() helper in scr_memcpyw() 

Use array3_size() helper instead of the open-coded version in scr_memcpyw()
and scr_memsetw(). These sorts of multiplication factors need to be wrapped
in array3_size().

This issue was found with the help of Coccinelle and, audited and fixed
manually.

Addresses-KSPP-ID: https://github.com/KSPP/linux/issues/83
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200615231542.GA20470@embeddedor
This commit is contained in:
Gustavo A. R. Silva 2020-06-15 18:15:42 -05:00 committed by Bartlomiej Zolnierkiewicz
parent cd7946c528
commit fcf918b966
1 changed files with 2 additions and 2 deletions
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4
drivers/video/fbdev/core/fbcon.c
View File

@ -639,7 +639,7 @@ static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
GFP_KERNEL);
if (save) {
int i = cols < new_cols ? cols : new_cols;
scr_memsetw(save, erase, logo_lines * new_cols * 2);
scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
r = q - step;
for (cnt = 0; cnt < logo_lines; cnt++, r += i)
scr_memcpyw(save + cnt * new_cols, r, 2 * i);
@ -676,7 +676,7 @@ static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
q = (unsigned short *) (vc->vc_origin +
vc->vc_size_row *
rows);
scr_memcpyw(q, save, logo_lines * new_cols * 2);
scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
vc->vc_y += logo_lines;
vc->vc_pos += logo_lines * vc->vc_size_row;
kfree(save);