[PATCH net] net: stmmac: fix TSO header length truncation

[patchwork-bot+netdevbpf at kernel.org]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba at kernel.org>:

On Fri, 11 Sep 2026 11:20:15 +0200 you wrote:
> stmmac_tso_xmit() stores the protocol header length returned by
> stmmac_tso_header_size() in a u8. stmmac_tso_valid_packet() admits
> headers up to 1023 bytes, so a header longer than 255 bytes wraps modulo
> 256 (486 becomes 230, 256 becomes 0).
> 
> A TCP over IPv6 socket carrying a few hundred bytes of sticky
> destination/hop-by-hop options makes skb_tcp_all_headers() exceed 255
> while staying below the 1023-byte limit, so such an skb reaches
> stmmac_tso_xmit().
> 
> [...]

Here is the summary with links:
  - [net] net: stmmac: fix TSO header length truncation
    https://git.kernel.org/netdev/net/c/15989abd74f1

You are awesome, thank you!
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