On Thu, 09 May 2019 21:57:49 -0700, John Fastabend wrote: > @@ -2042,12 +2060,14 @@ void tls_sw_free_resources_tx(struct sock *sk) > if (atomic_read(&ctx->encrypt_pending)) > crypto_wait_req(-EINPROGRESS, &ctx->async_wait); > > - release_sock(sk); > + if (locked) > + release_sock(sk); > cancel_delayed_work_sync(&ctx->tx_work.work);
So in the splat I got (on a slightly hacked up kernel) it seemed like unhash may be called in atomic context: [ 783.232150] tls_sk_proto_unhash+0x72/0x110 [tls] [ 783.237497] tcp_set_state+0x484/0x640 [ 783.241776] ? __sk_mem_reduce_allocated+0x72/0x4a0 [ 783.247317] ? tcp_recv_timestamp+0x5c0/0x5c0 [ 783.252265] ? tcp_write_queue_purge+0xa6a/0x1180 [ 783.257614] tcp_done+0xac/0x260 [ 783.261309] tcp_reset+0xbe/0x350 [ 783.265101] tcp_validate_incoming+0xd9d/0x1530 I may have been unclear off-list, I only tested the patch no longer crashes the offload :( > - lock_sock(sk); > + if (locked) > + lock_sock(sk); > > /* Tx whatever records we can transmit and abandon the rest */ > - tls_tx_records(sk, -1); > + tls_tx_records(sk, tls_ctx, -1); > > /* Free up un-sent records in tx_list. First, free > * the partially sent record if any at head of tx_list.
