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-rw-r--r--drivers/isdn/capi/kcapi.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c
index 9f73bc2727c..f5553186931 100644
--- a/drivers/isdn/capi/kcapi.c
+++ b/drivers/isdn/capi/kcapi.c
@@ -821,6 +821,8 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data)
return -EFAULT;
}
card = get_capi_ctr_by_nr(ldef.contr);
+ if (!card)
+ return -EINVAL;
card = capi_ctr_get(card);
if (!card)
return -ESRCH;