tun: Add missing bpf_net_ctx_clear() in do_xdp_generic()
There are cases where do_xdp_generic returns bpf_net_context without clearing it. This causes various memory corruptions, so the missing bpf_net_ctx_clear must be added. Reported-by: syzbot+44623300f057a28baf1e@syzkaller.appspotmail.com Fixes: fecef4cd42c6 ("tun: Assign missing bpf_net_context.") Signed-off-by: Jeongjun Park <aha310510@gmail.com> Acked-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Reported-by: syzbot+3c2b6d5d4bec3b904933@syzkaller.appspotmail.com Reported-by: syzbot+707d98c8649695eaf329@syzkaller.appspotmail.com Reported-by: syzbot+c226757eb784a9da3e8b@syzkaller.appspotmail.com Reported-by: syzbot+61a1cfc2b6632363d319@syzkaller.appspotmail.com Reported-by: syzbot+709e4c85c904bcd62735@syzkaller.appspotmail.com Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -5150,6 +5150,7 @@ int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff **pskb)
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bpf_net_ctx_clear(bpf_net_ctx);
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return XDP_DROP;
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}
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bpf_net_ctx_clear(bpf_net_ctx);
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}
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return XDP_PASS;
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out_redir:
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