[v3] av7110: check for negative array offset
Commit Message
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>
---
V2: change the check instead of making num and unsigned int
V3: white space changes
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@@ -277,7 +277,7 @@ static int dvb_ca_ioctl(struct file *file, unsigned int cmd, void *parg)
{
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) ?