net/tls: take into account that bpf_exec_tx_verdict() may free the record
bpf_exec_tx_verdict() may free the record if tls_push_record() fails, or if the entire record got consumed by BPF. Re-check ctx->open_rec before touching the data. Fixes: d3b18ad3 ("tls: add bpf support to sk_msg handling") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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