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authorDan Carpenter <dan.carpenter@oracle.com>2012-08-18 18:55:41 +0300
committerFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2012-08-23 12:34:00 +0000
commit25682362564fa0c950d9afe798def2ec9c3676a2 (patch)
tree5881de8390fe8200664160ba7baf20d882b9538c /drivers/video/mb862xx/mb862xxfbdrv.c
parent01817d194a5c078696ac4a31b5d8b99a6a9e40c7 (diff)
video: mb862xxfb: prevent divide by zero bug
Do a sanity check on these before using them as divisors. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/mb862xx/mb862xxfbdrv.c')
-rw-r--r--drivers/video/mb862xx/mb862xxfbdrv.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/video/mb862xx/mb862xxfbdrv.c b/drivers/video/mb862xx/mb862xxfbdrv.c
index 00ce1f34b49..57d940be5f3 100644
--- a/drivers/video/mb862xx/mb862xxfbdrv.c
+++ b/drivers/video/mb862xx/mb862xxfbdrv.c
@@ -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,