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authorRohit Maheshwari <rohitm@chelsio.com>2020-03-30 19:55:55 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-30 20:44:08 +0300
commit3a0a978389234995b64a8b8fbe343115bffb1551 (patch)
treefe81122886182b112b8ec24f7eb34c8697a4c6b6 /drivers/crypto
parente14394e656855c218c0c6cf918c550d5fdc1401d (diff)
downloadlinux-3a0a978389234995b64a8b8fbe343115bffb1551.tar.xz
crypto/chtls: Fix chtls crash in connection cleanup
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>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/chelsio/chtls/chtls_cm.c29
1 files changed, 25 insertions, 4 deletions
diff --git a/drivers/crypto/chelsio/chtls/chtls_cm.c b/drivers/crypto/chelsio/chtls/chtls_cm.c
index 9b2745ad9e38..d5720a859443 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: