github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 17:47:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

batman-adv: fix VLAN priority offset

Browse Source 
The batadv_skb_set_priority() receives an SKB with the inner ethernet
header at position "offset". When it tries to extract the IPv4 and IPv6
header, it needs to skip the ethernet header to get access to the IP
header.

But for VLAN header, it performs the access with the struct vlan_ethhdr.
This struct contains both both the ethernet header and the VLAN header. It
is therefore incorrect to skip over the whole vlan_ethhdr size to get
access to the vlan_ethhdr.

Cc: stable@vger.kernel.org
Fixes: c54f38c9aa ("batman-adv: set skb priority according to content")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
This commit is contained in:
Sven Eckelmann 2026-07-02 20:45:24 +02:00
parent 49df66b799
commit fdb3be00ba
No known key found for this signature in database
GPG Key ID: 4D0F772BD314F5CB
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/batman-adv/main.c
View File

@ -368,7 +368,7 @@ void batadv_skb_set_priority(struct sk_buff *skb, int offset)
switch (ethhdr->h_proto) {
case htons(ETH_P_8021Q):
vhdr = skb_header_pointer(skb, offset + sizeof(*vhdr),
vhdr = skb_header_pointer(skb, offset,
sizeof(*vhdr), &vhdr_tmp);
if (!vhdr)
return;