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av7110: check for negative array offset

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commit cb26a24ee9 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@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dan Carpenter
2011-01-07 16:41:54 -03:00
committed by Greg Kroah-Hartman
parent 595b62a8ac
commit dd6a19a57d
1 changed files with 1 additions and 1 deletions
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2
drivers/media/dvb/ttpci/av7110_ca.c
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@@ -277,7 +277,7 @@ static int dvb_ca_ioctl(struct inode *inode, struct file *file,
{
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) ?