kni: guard against unterminated name oops

If the name is too long, it triggers BUG in alloc_netdev().

Signed-off-by: Michał Mirosław <michal.miroslaw@atendesoftware.pl>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c b/lib/librte_eal/linuxapp/kni/kni_misc.c
index 03dacc1..33b61f2 100644 (file)
--- a/lib/librte_eal/linuxapp/kni/kni_misc.c
+++ b/lib/librte_eal/linuxapp/kni/kni_misc.c
@@ -343,6 +343,12 @@ kni_ioctl_create(struct net *net, uint32_t ioctl_num,
                return -EIO;
        }
 
+       /* Check if name is zero-ended */
+       if (strnlen(dev_info.name, sizeof(dev_info.name)) == sizeof(dev_info.name)) {
+               pr_err("kni.name not zero-terminated");
+               return -EINVAL;
+       }
+
        /**
         * Check if the cpu core id is valid for binding.
         */