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authorJakub Kicinski <kuba@kernel.org>2021-12-02 22:44:56 +0300
committerJakub Kicinski <kuba@kernel.org>2021-12-02 22:44:56 +0300
commitfc993be36f9ea7fc286d84d8471a1a20e871aad4 (patch)
treecef440a299ed7d1c2418992f7d724b4d86e6d83b /net/netlink/af_netlink.c
parent36d7d36fcf69e7f95068307f8bc519af31085431 (diff)
parenta51e3ac43ddbad891c2b1a4f3aa52371d6939570 (diff)
downloadlinux-fc993be36f9ea7fc286d84d8471a1a20e871aad4.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/netlink/af_netlink.c')
-rw-r--r--net/netlink/af_netlink.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 1a19d179e913..4be2d97ff93e 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1848,6 +1848,11 @@ static int netlink_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
if (msg->msg_flags & MSG_OOB)
return -EOPNOTSUPP;
+ if (len == 0) {
+ pr_warn_once("Zero length message leads to an empty skb\n");
+ return -ENODATA;
+ }
+
err = scm_send(sock, msg, &scm, true);
if (err < 0)
return err;