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linux/drivers/net/vxlan
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Eric Dumazet b9553558b4 vxlan: use pskb_network_may_pull() for transmit path header pulls 
In vxlan_xmit(), arp_reduce(), and vxlan_mdb_entry_skb_get(), pskb_may_pull() was
being called to verify the availability of network layer headers (ARP, IPv6/ND,
IP/IPv6 MDB keys).

However, during transmit skb->data points to the MAC header, so skb_network_offset(skb)
is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, len) only checks len bytes from skb->data
rather than skb_network_offset(skb) + len, which can leave part of the network header
in non-linear frags.

Replace these remaining pskb_may_pull() calls with pskb_network_may_pull() to properly
account for the MAC header offset.

Fixes: e4f67addf1 ("add DOVE extensions for VXLAN")
Fixes: f564f45c45 ("vxlan: add ipv6 proxy support")
Fixes: 0f83e69f44 ("vxlan: Add MDB data path support")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260723144249.759100-6-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
History 2026-07-27 15:16:15 -07:00
..
Makefile vxlan: mdb: Add MDB control path support 2023-03-17 08:05:49 +00:00
vxlan_core.c vxlan: use pskb_network_may_pull() for transmit path header pulls 2026-07-27 15:16:15 -07:00
vxlan_mdb.c vxlan: use pskb_network_may_pull() for transmit path header pulls 2026-07-27 15:16:15 -07:00
vxlan_multicast.c vxlan: Store struct sock in struct vxlan_sock. 2026-05-05 17:47:04 -07:00
vxlan_private.h vxlan: Remove unused declarations eth_vni_hash() and fdb_head_index() 2025-11-13 17:20:54 -08:00
vxlan_vnifilter.c vxlan: vnifilter: fix spurious notification on VNI update 2026-06-04 08:47:45 -07:00