Commit a9836336 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'tls-Fix-issues-in-tls_device' 

Boris Pismenny says:

====================
tls: Fix issues in tls_device

This series fixes issues encountered in tls_device code paths,
which were introduced recently.

Additionally, this series includes a fix for tls software only receive flow,
which causes corruption of payload received by user space applications.

This series was tested using the OpenSSL integration of KTLS -
https://github.com/mellan


====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 7d827379 d069b780

include/net/tls.h

+7 −16
Original line number Diff line number Diff line
@@ -199,10 +199,6 @@ struct tls_offload_context_tx { 
	(ALIGN(sizeof(struct tls_offload_context_tx), sizeof(void *)) +        \

	 TLS_DRIVER_STATE_SIZE)



enum {

	TLS_PENDING_CLOSED_RECORD

};



struct cipher_context {

	char *iv;

	char *rec_seq;
@@ -335,17 +331,14 @@ int tls_push_sg(struct sock *sk, struct tls_context *ctx, 
int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,

			    int flags);



int tls_push_pending_closed_record(struct sock *sk, struct tls_context *ctx,

				   int flags, long *timeo);



static inline struct tls_msg *tls_msg(struct sk_buff *skb)

{

	return (struct tls_msg *)strp_msg(skb);

}



static inline bool tls_is_pending_closed_record(struct tls_context *ctx)

static inline bool tls_is_partially_sent_record(struct tls_context *ctx)

{

	return test_bit(TLS_PENDING_CLOSED_RECORD, &ctx->flags);

	return !!ctx->partially_sent_record;

}



static inline int tls_complete_pending_work(struct sock *sk,
@@ -357,17 +350,12 @@ static inline int tls_complete_pending_work(struct sock *sk, 
	if (unlikely(sk->sk_write_pending))

		rc = wait_on_pending_writer(sk, timeo);



	if (!rc && tls_is_pending_closed_record(ctx))

		rc = tls_push_pending_closed_record(sk, ctx, flags, timeo);

	if (!rc && tls_is_partially_sent_record(ctx))

		rc = tls_push_partial_record(sk, ctx, flags);



	return rc;

}



static inline bool tls_is_partially_sent_record(struct tls_context *ctx)

{

	return !!ctx->partially_sent_record;

}



static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)

{

	return tls_ctx->pending_open_record_frags;
@@ -531,6 +519,9 @@ static inline bool tls_sw_has_ctx_tx(const struct sock *sk) 
	return !!tls_sw_ctx_tx(ctx);

}



void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);

void tls_device_write_space(struct sock *sk, struct tls_context *ctx);



static inline struct tls_offload_context_rx *

tls_offload_ctx_rx(const struct tls_context *tls_ctx)

{

net/tls/tls_device.c

+22 −4
Original line number Diff line number Diff line
@@ -271,7 +271,6 @@ static int tls_push_record(struct sock *sk, 
	list_add_tail(&record->list, &offload_ctx->records_list);

	spin_unlock_irq(&offload_ctx->lock);

	offload_ctx->open_record = NULL;

	set_bit(TLS_PENDING_CLOSED_RECORD, &ctx->flags);

	tls_advance_record_sn(sk, &ctx->tx, ctx->crypto_send.info.version);



	for (i = 0; i < record->num_frags; i++) {
@@ -368,9 +367,11 @@ static int tls_push_data(struct sock *sk, 
		return -sk->sk_err;



	timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);

	rc = tls_complete_pending_work(sk, tls_ctx, flags, &timeo);

	if (tls_is_partially_sent_record(tls_ctx)) {

		rc = tls_push_partial_record(sk, tls_ctx, flags);

		if (rc < 0)

			return rc;

	}



	pfrag = sk_page_frag(sk);
@@ -545,6 +546,23 @@ static int tls_device_push_pending_record(struct sock *sk, int flags) 
	return tls_push_data(sk, &msg_iter, 0, flags, TLS_RECORD_TYPE_DATA);

}



void tls_device_write_space(struct sock *sk, struct tls_context *ctx)

{

	int rc = 0;



	if (!sk->sk_write_pending && tls_is_partially_sent_record(ctx)) {

		gfp_t sk_allocation = sk->sk_allocation;



		sk->sk_allocation = GFP_ATOMIC;

		rc = tls_push_partial_record(sk, ctx,

					     MSG_DONTWAIT | MSG_NOSIGNAL);

		sk->sk_allocation = sk_allocation;

	}



	if (!rc)

		ctx->sk_write_space(sk);

}



void handle_device_resync(struct sock *sk, u32 seq, u64 rcd_sn)

{

	struct tls_context *tls_ctx = tls_get_ctx(sk);

net/tls/tls_main.c

+6 −22
Original line number Diff line number Diff line
@@ -209,23 +209,9 @@ int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 
	return tls_push_sg(sk, ctx, sg, offset, flags);

}



int tls_push_pending_closed_record(struct sock *sk,

				   struct tls_context *tls_ctx,

				   int flags, long *timeo)

{

	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);



	if (tls_is_partially_sent_record(tls_ctx) ||

	    !list_empty(&ctx->tx_list))

		return tls_tx_records(sk, flags);

	else

		return tls_ctx->push_pending_record(sk, flags);

}



static void tls_write_space(struct sock *sk)

{

	struct tls_context *ctx = tls_get_ctx(sk);

	struct tls_sw_context_tx *tx_ctx = tls_sw_ctx_tx(ctx);



	/* If in_tcp_sendpages call lower protocol write space handler

	 * to ensure we wake up any waiting operations there. For example
@@ -236,14 +222,12 @@ static void tls_write_space(struct sock *sk) 
		return;

	}



	/* Schedule the transmission if tx list is ready */

	if (is_tx_ready(tx_ctx) && !sk->sk_write_pending) {

		/* Schedule the transmission */

		if (!test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask))

			schedule_delayed_work(&tx_ctx->tx_work.work, 0);

	}



	ctx->sk_write_space(sk);

#ifdef CONFIG_TLS_DEVICE

	if (ctx->tx_conf == TLS_HW)

		tls_device_write_space(sk, ctx);

	else

#endif

		tls_sw_write_space(sk, ctx);

}



static void tls_ctx_free(struct tls_context *ctx)

net/tls/tls_sw.c

+36 −17
Original line number Diff line number Diff line
@@ -1467,13 +1467,16 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb, 
	struct strp_msg *rxm = strp_msg(skb);

	int err = 0;



	if (!ctx->decrypted) {

#ifdef CONFIG_TLS_DEVICE

		err = tls_device_decrypted(sk, skb);

		if (err < 0)

			return err;

#endif

		/* Still not decrypted after tls_device */

		if (!ctx->decrypted) {

		err = decrypt_internal(sk, skb, dest, NULL, chunk, zc, async);

			err = decrypt_internal(sk, skb, dest, NULL, chunk, zc,

					       async);

			if (err < 0) {

				if (err == -EINPROGRESS)

					tls_advance_record_sn(sk, &tls_ctx->rx,
@@ -1481,9 +1484,9 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb, 


				return err;

			}

		}



		rxm->full_len -= padding_length(ctx, tls_ctx, skb);



		rxm->offset += prot->prepend_size;

		rxm->full_len -= prot->overhead_size;

		tls_advance_record_sn(sk, &tls_ctx->rx, version);
@@ -1693,7 +1696,8 @@ int tls_sw_recvmsg(struct sock *sk, 
		bool zc = false;

		int to_decrypt;

		int chunk = 0;

		bool async;

		bool async_capable;

		bool async = false;



		skb = tls_wait_data(sk, psock, flags, timeo, &err);

		if (!skb) {
@@ -1727,21 +1731,23 @@ int tls_sw_recvmsg(struct sock *sk, 


		/* Do not use async mode if record is non-data */

		if (ctx->control == TLS_RECORD_TYPE_DATA)

			async = ctx->async_capable;

			async_capable = ctx->async_capable;

		else

			async = false;

			async_capable = false;



		err = decrypt_skb_update(sk, skb, &msg->msg_iter,

					 &chunk, &zc, async);

					 &chunk, &zc, async_capable);

		if (err < 0 && err != -EINPROGRESS) {

			tls_err_abort(sk, EBADMSG);

			goto recv_end;

		}



		if (err == -EINPROGRESS)

		if (err == -EINPROGRESS) {

			async = true;

			num_async++;

		else if (prot->version == TLS_1_3_VERSION)

		} else if (prot->version == TLS_1_3_VERSION) {

			tlm->control = ctx->control;

		}



		/* If the type of records being processed is not known yet,

		 * set it to record type just dequeued. If it is already known,
@@ -2126,6 +2132,19 @@ static void tx_work_handler(struct work_struct *work) 
	release_sock(sk);

}



void tls_sw_write_space(struct sock *sk, struct tls_context *ctx)

{

	struct tls_sw_context_tx *tx_ctx = tls_sw_ctx_tx(ctx);



	/* Schedule the transmission if tx list is ready */

	if (is_tx_ready(tx_ctx) && !sk->sk_write_pending) {

		/* Schedule the transmission */

		if (!test_and_set_bit(BIT_TX_SCHEDULED,

				      &tx_ctx->tx_bitmask))

			schedule_delayed_work(&tx_ctx->tx_work.work, 0);

	}

}



int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)

{

	struct tls_context *tls_ctx = tls_get_ctx(sk);

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