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>
---
V2: change the check instead of making num and unsigned int
diff --git a/drivers/media/dvb/ttpci/av7110_ca.c b/drivers/media/dvb/ttpci/av7110_ca.c
index 122c728..923a8e2 100644
--- 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 *file, unsigned int cmd, void *parg)
{
ca_slot_info_t *info=(ca_slot_info_t *)parg;
- if (info->num > 1)
+ if ((unsigned)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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