diff options
| author | Eric Dumazet <edumazet@google.com> | 2024-11-22 17:13:43 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-05 14:02:33 +0100 |
| commit | 50aa2502d42928ae0a245d5c8f4a45b3ee335fce (patch) | |
| tree | c68978435000d88f237e8232f8b8f1f95157a615 | |
| parent | 18dcd8a978d1532cb455ed60db6a87291bd70937 (diff) | |
net: hsr: fix hsr_init_sk() vs network/transport headers.
[ Upstream commit 9cfb5e7f0ded2bfaabc270ceb5f91d13f0e805b9 ]
Following sequence in hsr_init_sk() is invalid :
skb_reset_mac_header(skb);
skb_reset_mac_len(skb);
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
It is invalid because skb_reset_mac_len() needs the correct
network header, which should be after the mac header.
This patch moves the skb_reset_network_header()
and skb_reset_transport_header() before
the call to dev_hard_header().
As a result skb->mac_len is no longer set to a value
close to 65535.
Fixes: 48b491a5cc74 ("net: hsr: fix mac_len checks")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: George McCollister <george.mccollister@gmail.com>
Link: https://patch.msgid.link/20241122171343.897551-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/hsr/hsr_device.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index ebdfd5b64e17..f630d6645636 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -268,6 +268,8 @@ static struct sk_buff *hsr_init_skb(struct hsr_port *master) skb->dev = master->dev; skb->priority = TC_PRIO_CONTROL; + skb_reset_network_header(skb); + skb_reset_transport_header(skb); if (dev_hard_header(skb, skb->dev, ETH_P_PRP, hsr->sup_multicast_addr, skb->dev->dev_addr, skb->len) <= 0) @@ -275,8 +277,6 @@ static struct sk_buff *hsr_init_skb(struct hsr_port *master) skb_reset_mac_header(skb); skb_reset_mac_len(skb); - skb_reset_network_header(skb); - skb_reset_transport_header(skb); return skb; out: |