[PATCHv2] net/tls: avoid TCP window full during ->read_sock()
From: Hannes Reinecke <hare@suse.de>
Date: 2023-08-07 07:10:34
Also in:
linux-nvme
Subsystem:
networking [general], networking [tls], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, John Fastabend, Sabrina Dubroca, Linus Torvalds
When flushing the backlog after decoding a record we don't really know how much data the caller want us to evaluate, so use INT_MAX and 0 as arguments to tls_read_flush_backlog() to ensure we flush at 128k of data. Otherwise we might be reading too much data and trigger a TCP window full. Suggested-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Hannes Reinecke <hare@suse.de> --- net/tls/tls_sw.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 9c1f13541708..5c122d7bb784 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c@@ -2240,7 +2240,6 @@ int tls_sw_read_sock(struct sock *sk, read_descriptor_t *desc, tlm = tls_msg(skb); } else { struct tls_decrypt_arg darg; - int to_decrypt; err = tls_rx_rec_wait(sk, NULL, true, released); if (err <= 0)
@@ -2248,20 +2247,18 @@ int tls_sw_read_sock(struct sock *sk, read_descriptor_t *desc, memset(&darg.inargs, 0, sizeof(darg.inargs)); - rxm = strp_msg(tls_strp_msg(ctx)); - tlm = tls_msg(tls_strp_msg(ctx)); - - to_decrypt = rxm->full_len - prot->overhead_size; - err = tls_rx_one_record(sk, NULL, &darg); if (err < 0) { tls_err_abort(sk, -EBADMSG); goto read_sock_end; } - released = tls_read_flush_backlog(sk, prot, rxm->full_len, to_decrypt, - decrypted, &flushed_at); + released = tls_read_flush_backlog(sk, prot, INT_MAX, + 0, decrypted, + &flushed_at); skb = darg.skb; + rxm = strp_msg(skb); + tlm = tls_msg(skb); decrypted += rxm->full_len; tls_rx_rec_done(ctx);
--
2.35.3