| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1407442967-2109-1-git-send-email-dborkman@redhat.com> Date: Thu, 7 Aug 2014 22:22:47 +0200 From: Daniel Borkmann <dborkman@...hat.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, marcel@...tmann.org Subject: [PATCH net] netlink: reset network header before passing to taps netlink doesn't set any network header offset thus when the skb is being passed to tap devices via dev_queue_xmit_nit(), it emits klog false positives due to it being unset like: ... [ 124.990397] protocol 0000 is buggy, dev nlmon0 [ 124.990411] protocol 0000 is buggy, dev nlmon0 ... So just reset the network header before passing to the device; for packet sockets that just means nothing will change - mac and net offset hold the same value just as before. Reported-by: Marcel Holtmann <marcel@...tmann.org> Signed-off-by: Daniel Borkmann <dborkman@...hat.com> --- net/netlink/af_netlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index a324b4b..2e152e5 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -213,7 +213,7 @@ static int __netlink_deliver_tap_skb(struct sk_buff *skb, nskb->protocol = htons((u16) sk->sk_protocol); nskb->pkt_type = netlink_is_kernel(sk) ? PACKET_KERNEL : PACKET_USER; - + skb_reset_network_header(nskb); ret = dev_queue_xmit(nskb); if (unlikely(ret > 0)) ret = net_xmit_errno(ret); -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists