[PATCH AUTOSEL 5.6 048/149] crypto: chelsio - Endianess bug in create_authenc_wr

[PATCH AUTOSEL 5.6 048/149] crypto: chelsio - Endianess bug in create_authenc_wr

[Sasha Levin]

From: Al Viro <viro@zeniv.linux.org.uk>

[ Upstream commit ff462ddfd95b915345c3c7c037c3bfafdc58bae7 ]

kctx_len = (ntohl(KEY_CONTEXT_CTX_LEN_V(aeadctx->key_ctx_hdr)) << 4)
                - sizeof(chcr_req->key_ctx);
can't possibly be endian-safe.  Look: ->key_ctx_hdr is __be32.  And
KEY_CONTEXT_CTX_LEN_V is "shift up by 24 bits".  On little-endian hosts it
sees
	b0 b1 b2 b3
in memory, inteprets that into b0 + (b1 << 8) + (b2 << 16) + (b3 << 24),
shifts up by 24, resulting in b0 << 24, does ntohl (byteswap on l-e),
gets b0 and shifts that up by 4.  So we get b0 * 16 - sizeof(...).

Sounds reasonable, but on b-e we get
b3 + (b2 << 8) + (b1 << 16) + (b0 << 24), shift up by 24,
yielding b3 << 24, do ntohl (no-op on b-e) and then shift up by 4.
Resulting in b3 << 28 - sizeof(...), i.e. slightly under b3 * 256M.

Then we increase it some more and pass to alloc_skb() as size.
Somehow I doubt that we really want a quarter-gigabyte skb allocation
here...

Note that when you are building those values in
#define  FILL_KEY_CTX_HDR(ck_size, mk_size, d_ck, opad, ctx_len) \
                htonl(KEY_CONTEXT_VALID_V(1) | \
                      KEY_CONTEXT_CK_SIZE_V((ck_size)) | \
                      KEY_CONTEXT_MK_SIZE_V(mk_size) | \
                      KEY_CONTEXT_DUAL_CK_V((d_ck)) | \
                      KEY_CONTEXT_OPAD_PRESENT_V((opad)) | \
                      KEY_CONTEXT_SALT_PRESENT_V(1) | \
                      KEY_CONTEXT_CTX_LEN_V((ctx_len)))
ctx_len ends up in the first octet (i.e. b0 in the above), which
matches the current behaviour on l-e.  If that's the intent, this
thing should've been
        kctx_len = (KEY_CONTEXT_CTX_LEN_G(ntohl(aeadctx->key_ctx_hdr)) << 4)
                - sizeof(chcr_req->key_ctx);
instead - fetch after ntohl() we get (b0 << 24) + (b1 << 16) + (b2 << 8) + b3,
shift it down by 24 (b0), resuling in b0 * 16 - sizeof(...) both on l-e and
on b-e.

PS: when sparse warns you about endianness problems, it might be worth checking
if there really is something wrong.  And I don't mean "slap __force cast on it"...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/chelsio/chcr_algo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c
index b4b9b22125d17..ad18124d0acb1 100644
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -2351,7 +2351,7 @@ static struct sk_buff *create_authenc_wr(struct aead_request *req,
 	snents = sg_nents_xlen(req->src, req->assoclen + req->cryptlen,
 			       CHCR_SRC_SG_SIZE, 0);
 	dst_size = get_space_for_phys_dsgl(dnents);
-	kctx_len = (ntohl(KEY_CONTEXT_CTX_LEN_V(aeadctx->key_ctx_hdr)) << 4)
+	kctx_len = (KEY_CONTEXT_CTX_LEN_G(ntohl(aeadctx->key_ctx_hdr)) << 4)
 		- sizeof(chcr_req->key_ctx);
 	transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size);
 	reqctx->imm = (transhdr_len + req->assoclen + req->cryptlen) <
-- 
2.20.1

[PATCH AUTOSEL 5.6 063/149] crypto: chelsio - This fixes the kernel panic which occurs during a libkcapi test

[Sasha Levin]

From: Ayush Sawal <ayush.sawal@chelsio.com>

[ Upstream commit 9195189e00a7db55e7d448cee973cae87c5a3c71 ]

The libkcapi test which causes kernel panic is
aead asynchronous vmsplice multiple test.

./bin/kcapi  -v -d 4 -x 10   -c "ccm(aes)"
-q 4edb58e8d5eb6bc711c43a6f3693daebde2e5524f1b55297abb29f003236e43d
-t a7877c99 -n 674742abd0f5ba -k 2861fd0253705d7875c95ba8a53171b4
-a fb7bc304a3909e66e2e0c5ef952712dd884ce3e7324171369f2c5db1adc48c7d

This patch avoids dma_mapping of a zero length sg which causes the panic,
by using sg_nents_for_len which maps only upto a specific length

Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/chelsio/chcr_algo.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c
index ad18124d0acb1..f181330acc0b3 100644
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -2471,8 +2471,9 @@ int chcr_aead_dma_map(struct device *dev,
 	else
 		reqctx->b0_dma = 0;
 	if (req->src == req->dst) {
-		error = dma_map_sg(dev, req->src, sg_nents(req->src),
-				   DMA_BIDIRECTIONAL);
+		error = dma_map_sg(dev, req->src,
+				sg_nents_for_len(req->src, dst_size),
+					DMA_BIDIRECTIONAL);
 		if (!error)
 			goto err;
 	} else {
-- 
2.20.1

[PATCH AUTOSEL 5.6 064/149] crypto: tcrypt - fix printed skcipher [a]sync mode

[Sasha Levin]

From: Horia Geantă <horia.geanta@nxp.com>

[ Upstream commit 8e3b7fd7ea554ccb1bdc596bfbcdaf56f7ab017c ]

When running tcrypt skcipher speed tests, logs contain things like:
testing speed of async ecb(des3_ede) (ecb(des3_ede-generic)) encryption
or:
testing speed of async ecb(aes) (ecb(aes-ce)) encryption

The algorithm implementations are sync, not async.
Fix this inaccuracy.

Fixes: 7166e589da5b6 ("crypto: tcrypt - Use skcipher")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 crypto/tcrypt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index f42f486e90e8a..ba0b7702f2e91 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -1514,8 +1514,8 @@ static void test_skcipher_speed(const char *algo, int enc, unsigned int secs,
 		return;
 	}
 
-	pr_info("\ntesting speed of async %s (%s) %s\n", algo,
-			get_driver_name(crypto_skcipher, tfm), e);
+	pr_info("\ntesting speed of %s %s (%s) %s\n", async ? "async" : "sync",
+		algo, get_driver_name(crypto_skcipher, tfm), e);
 
 	req = skcipher_request_alloc(tfm, GFP_KERNEL);
 	if (!req) {
-- 
2.20.1

[PATCH AUTOSEL 5.6 118/149] crypto/chtls: Fix chtls crash in connection cleanup

[Sasha Levin]

From: Rohit Maheshwari <rohitm@chelsio.com>

[ Upstream commit 3a0a978389234995b64a8b8fbe343115bffb1551 ]

There is a possibility that cdev is removed before CPL_ABORT_REQ_RSS
is fully processed, so it's better to save it in skb.

Added checks in handling the flow correctly, which suggests connection reset
request is sent to HW, wait for HW to respond.

Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/chelsio/chtls/chtls_cm.c | 29 +++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/chelsio/chtls/chtls_cm.c b/drivers/crypto/chelsio/chtls/chtls_cm.c
index 9b2745ad9e380..d5720a8594435 100644
--- a/drivers/crypto/chelsio/chtls/chtls_cm.c
+++ b/drivers/crypto/chelsio/chtls/chtls_cm.c
@@ -445,6 +445,7 @@ void chtls_destroy_sock(struct sock *sk)
 	chtls_purge_write_queue(sk);
 	free_tls_keyid(sk);
 	kref_put(&csk->kref, chtls_sock_release);
+	csk->cdev = NULL;
 	sk->sk_prot = &tcp_prot;
 	sk->sk_prot->destroy(sk);
 }
@@ -759,8 +760,10 @@ static void chtls_release_resources(struct sock *sk)
 		csk->l2t_entry = NULL;
 	}
 
-	cxgb4_remove_tid(tids, csk->port_id, tid, sk->sk_family);
-	sock_put(sk);
+	if (sk->sk_state != TCP_SYN_SENT) {
+		cxgb4_remove_tid(tids, csk->port_id, tid, sk->sk_family);
+		sock_put(sk);
+	}
 }
 
 static void chtls_conn_done(struct sock *sk)
@@ -1716,6 +1719,9 @@ static void chtls_peer_close(struct sock *sk, struct sk_buff *skb)
 {
 	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
 
+	if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
+		goto out;
+
 	sk->sk_shutdown |= RCV_SHUTDOWN;
 	sock_set_flag(sk, SOCK_DONE);
 
@@ -1748,6 +1754,7 @@ static void chtls_peer_close(struct sock *sk, struct sk_buff *skb)
 		else
 			sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
 	}
+out:
 	kfree_skb(skb);
 }
 
@@ -1758,6 +1765,10 @@ static void chtls_close_con_rpl(struct sock *sk, struct sk_buff *skb)
 	struct tcp_sock *tp;
 
 	csk = rcu_dereference_sk_user_data(sk);
+
+	if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
+		goto out;
+
 	tp = tcp_sk(sk);
 
 	tp->snd_una = ntohl(rpl->snd_nxt) - 1;  /* exclude FIN */
@@ -1787,6 +1798,7 @@ static void chtls_close_con_rpl(struct sock *sk, struct sk_buff *skb)
 	default:
 		pr_info("close_con_rpl in bad state %d\n", sk->sk_state);
 	}
+out:
 	kfree_skb(skb);
 }
 
@@ -1896,6 +1908,7 @@ static void chtls_send_abort_rpl(struct sock *sk, struct sk_buff *skb,
 	}
 
 	set_abort_rpl_wr(reply_skb, tid, status);
+	kfree_skb(skb);
 	set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue);
 	if (csk_conn_inline(csk)) {
 		struct l2t_entry *e = csk->l2t_entry;
@@ -1906,7 +1919,6 @@ static void chtls_send_abort_rpl(struct sock *sk, struct sk_buff *skb,
 		}
 	}
 	cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
-	kfree_skb(skb);
 }
 
 /*
@@ -2008,7 +2020,8 @@ static void chtls_abort_req_rss(struct sock *sk, struct sk_buff *skb)
 		chtls_conn_done(sk);
 	}
 
-	chtls_send_abort_rpl(sk, skb, csk->cdev, rst_status, queue);
+	chtls_send_abort_rpl(sk, skb, BLOG_SKB_CB(skb)->cdev,
+			     rst_status, queue);
 }
 
 static void chtls_abort_rpl_rss(struct sock *sk, struct sk_buff *skb)
@@ -2042,6 +2055,7 @@ static int chtls_conn_cpl(struct chtls_dev *cdev, struct sk_buff *skb)
 	struct cpl_peer_close *req = cplhdr(skb) + RSS_HDR;
 	void (*fn)(struct sock *sk, struct sk_buff *skb);
 	unsigned int hwtid = GET_TID(req);
+	struct chtls_sock *csk;
 	struct sock *sk;
 	u8 opcode;
 
@@ -2051,6 +2065,8 @@ static int chtls_conn_cpl(struct chtls_dev *cdev, struct sk_buff *skb)
 	if (!sk)
 		goto rel_skb;
 
+	csk = sk->sk_user_data;
+
 	switch (opcode) {
 	case CPL_PEER_CLOSE:
 		fn = chtls_peer_close;
@@ -2059,6 +2075,11 @@ static int chtls_conn_cpl(struct chtls_dev *cdev, struct sk_buff *skb)
 		fn = chtls_close_con_rpl;
 		break;
 	case CPL_ABORT_REQ_RSS:
+		/*
+		 * Save the offload device in the skb, we may process this
+		 * message after the socket has closed.
+		 */
+		BLOG_SKB_CB(skb)->cdev = csk->cdev;
 		fn = chtls_abort_req_rss;
 		break;
 	case CPL_ABORT_RPL_RSS:
-- 
2.20.1