On Fri, Sep 13, 2024 at 05:06:15PM +0000, Eric Dumazet wrote:
> syzbot reported that nf_reject_ip6_tcphdr_put() was possibly sending
> garbage on the four reserved tcp bits (th->res1)
>
> Use skb_put_zero() to clear the whole TCP header,
> as done in nf_reject_ip_tcphdr_put()
...
> Fixes: c8d7b98bec43 ("netfilter: move nf_send_resetX() code to nf_reject_ipvX modules")
> Reported-by: syzbot <syzkaller@xxxxxxxxxxxxxxxx>
> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
