sieni
/
linux
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

netfilter: nf_flow_table_ip: reset mac header before vlan push 

With double vlan tagged packets in the fastpath, getting the error:

skb_vlan_push got skb with skb->data not at mac header (offset 18)

Call skb_reset_mac_header() before calling skb_vlan_push().

Fixes: c653d5a78f ("netfilter: flowtable: inline vlan encapsulation in xmit path")
Signed-off-by: Eric Woudstra <ericwouds@gmail.com>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
This commit is contained in:
Eric Woudstra 2026-03-10 15:39:33 +01:00 committed by Florian Westphal
parent 598adea720
commit a3aca98aec
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/netfilter/nf_flow_table_ip.c
View File

@ -738,6 +738,7 @@ static int nf_flow_encap_push(struct sk_buff *skb,
switch (tuple->encap[i].proto) {
case htons(ETH_P_8021Q):
case htons(ETH_P_8021AD):
skb_reset_mac_header(skb);
if (skb_vlan_push(skb, tuple->encap[i].proto,
tuple->encap[i].id) < 0)
return -1;