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Commit 25682362 authored by Dan Carpenter's avatar Dan Carpenter Committed by Florian Tobias Schandinat
Browse files

video: mb862xxfb: prevent divide by zero bug 



Do a sanity check on these before using them as divisors.

Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Acked-by: default avatarAnatolij Gustschin <agust@denx.de>
Signed-off-by: default avatarFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
parent 01817d19

drivers/video/mb862xx/mb862xxfbdrv.c

+2 −0
Original line number Diff line number Diff line
@@ -328,6 +328,8 @@ static int mb862xxfb_ioctl(struct fb_info *fbi, unsigned int cmd, 
	case MB862XX_L1_SET_CFG:

		if (copy_from_user(l1_cfg, argp, sizeof(*l1_cfg)))

			return -EFAULT;

		if (l1_cfg->dh == 0 || l1_cfg->dw == 0)

			return -EINVAL;

		if ((l1_cfg->sw >= l1_cfg->dw) && (l1_cfg->sh >= l1_cfg->dh)) {

			/* downscaling */

			outreg(cap, GC_CAP_CSC,