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authorEric Dumazet <edumazet@google.com>2024-11-22 17:13:43 +0000
committerPaolo Abeni <pabeni@redhat.com>2024-11-26 12:45:53 +0100
commit9cfb5e7f0ded2bfaabc270ceb5f91d13f0e805b9 (patch)
tree7d4a44bacbbddb6f4c5fd6e8631e97629d7b7289
parent05cff25eb32ce375a59431afe47a6fe0b9548b78 (diff)
net: hsr: fix hsr_init_sk() vs network/transport headers.
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>
-rw-r--r--net/hsr/hsr_device.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index 9e64496a5c1c..31a416ee21ad 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: