[20/70] [media] [v3,media] av7110: check for negative array offset

From: Greg KH
Date: Tue Feb 22 2011 - 17:33:29 EST


2.6.37-stable review patch. If anyone has any objections, please let us know.

------------------

From: Dan Carpenter <error27@xxxxxxxxx>

commit cb26a24ee9706473f31d34cc259f4dcf45cd0644 upstream.

info->num comes from the user. It's type int. If the user passes
in a negative value that would cause memory corruption.

Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
drivers/media/dvb/ttpci/av7110_ca.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/dvb/ttpci/av7110_ca.c
+++ b/drivers/media/dvb/ttpci/av7110_ca.c
@@ -277,7 +277,7 @@ static int dvb_ca_ioctl(struct file *fil
{
ca_slot_info_t *info=(ca_slot_info_t *)parg;

- if (info->num > 1)
+ if (info->num < 0 || info->num > 1)
return -EINVAL;
av7110->ci_slot[info->num].num = info->num;
av7110->ci_slot[info->num].type = FW_CI_LL_SUPPORT(av7110->arm_app) ?


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