diff options
| -rw-r--r-- | net/core/rtnetlink.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 79f62517e24a..0d3f724da78b 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2970,9 +2970,12 @@ replay: ifname[0] = '\0'; ifm = nlmsg_data(nlh); - if (ifm->ifi_index > 0) + if (ifm->ifi_index > 0) { dev = __dev_get_by_index(net, ifm->ifi_index); - else { + } else if (ifm->ifi_index < 0) { + NL_SET_ERR_MSG(extack, "ifindex can't be negative"); + return -EINVAL; + } else { if (ifname[0]) dev = __dev_get_by_name(net, ifname); else |