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Diffstat (limited to 'net/can')
-rw-r--r--net/can/bcm.c11
-rw-r--r--net/can/gw.c3
-rw-r--r--net/can/isotp.c47
-rw-r--r--net/can/j1939/main.c4
-rw-r--r--net/can/j1939/socket.c9
-rw-r--r--net/can/proc.c6
-rw-r--r--net/can/raw.c6
7 files changed, 50 insertions, 36 deletions
diff --git a/net/can/bcm.c b/net/can/bcm.c
index f3e4d9528fa3..508f67de0b80 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -785,6 +785,7 @@ static int bcm_delete_rx_op(struct list_head *ops, struct bcm_msg_head *mh,
bcm_rx_handler, op);
list_del(&op->list);
+ synchronize_rcu();
bcm_remove_op(op);
return 1; /* done */
}
@@ -1417,7 +1418,7 @@ static void bcm_notify(struct bcm_sock *bo, unsigned long msg,
if (notify_enodev) {
sk->sk_err = ENODEV;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
}
break;
@@ -1425,7 +1426,7 @@ static void bcm_notify(struct bcm_sock *bo, unsigned long msg,
if (bo->bound && bo->ifindex == dev->ifindex) {
sk->sk_err = ENETDOWN;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
}
}
}
@@ -1533,9 +1534,13 @@ static int bcm_release(struct socket *sock)
REGMASK(op->can_id),
bcm_rx_handler, op);
- bcm_remove_op(op);
}
+ synchronize_rcu();
+
+ list_for_each_entry_safe(op, next, &bo->rx_ops, list)
+ bcm_remove_op(op);
+
#if IS_ENABLED(CONFIG_PROC_FS)
/* remove procfs entry */
if (net->can.bcmproc_dir && bo->bcm_proc_read)
diff --git a/net/can/gw.c b/net/can/gw.c
index ba4124805602..d8861e862f15 100644
--- a/net/can/gw.c
+++ b/net/can/gw.c
@@ -596,6 +596,7 @@ static int cgw_notifier(struct notifier_block *nb,
if (gwj->src.dev == dev || gwj->dst.dev == dev) {
hlist_del(&gwj->list);
cgw_unregister_filter(net, gwj);
+ synchronize_rcu();
kmem_cache_free(cgw_cache, gwj);
}
}
@@ -1154,6 +1155,7 @@ static void cgw_remove_all_jobs(struct net *net)
hlist_for_each_entry_safe(gwj, nx, &net->can.cgw_list, list) {
hlist_del(&gwj->list);
cgw_unregister_filter(net, gwj);
+ synchronize_rcu();
kmem_cache_free(cgw_cache, gwj);
}
}
@@ -1222,6 +1224,7 @@ static int cgw_remove_job(struct sk_buff *skb, struct nlmsghdr *nlh,
hlist_del(&gwj->list);
cgw_unregister_filter(net, gwj);
+ synchronize_rcu();
kmem_cache_free(cgw_cache, gwj);
err = 0;
break;
diff --git a/net/can/isotp.c b/net/can/isotp.c
index be6183f8ca11..caaa532ece94 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -168,7 +168,7 @@ static enum hrtimer_restart isotp_rx_timer_handler(struct hrtimer *hrtimer)
/* report 'connection timed out' */
sk->sk_err = ETIMEDOUT;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
/* reset rx state */
so->rx.state = ISOTP_IDLE;
@@ -225,8 +225,8 @@ static int isotp_send_fc(struct sock *sk, int ae, u8 flowstatus)
can_send_ret = can_send(nskb, 1);
if (can_send_ret)
- pr_notice_once("can-isotp: %s: can_send_ret %d\n",
- __func__, can_send_ret);
+ pr_notice_once("can-isotp: %s: can_send_ret %pe\n",
+ __func__, ERR_PTR(can_send_ret));
dev_put(dev);
@@ -339,7 +339,7 @@ static int isotp_rcv_fc(struct isotp_sock *so, struct canfd_frame *cf, int ae)
/* malformed PDU - report 'not a data message' */
sk->sk_err = EBADMSG;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
so->tx.state = ISOTP_IDLE;
wake_up_interruptible(&so->wait);
@@ -392,7 +392,7 @@ static int isotp_rcv_fc(struct isotp_sock *so, struct canfd_frame *cf, int ae)
/* overflow on receiver side - report 'message too long' */
sk->sk_err = EMSGSIZE;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
fallthrough;
default:
@@ -420,7 +420,7 @@ static int isotp_rcv_sf(struct sock *sk, struct canfd_frame *cf, int pcilen,
/* malformed PDU - report 'not a data message' */
sk->sk_err = EBADMSG;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
return 1;
}
@@ -535,7 +535,7 @@ static int isotp_rcv_cf(struct sock *sk, struct canfd_frame *cf, int ae,
/* wrong sn detected - report 'illegal byte sequence' */
sk->sk_err = EILSEQ;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
/* reset rx state */
so->rx.state = ISOTP_IDLE;
@@ -559,7 +559,7 @@ static int isotp_rcv_cf(struct sock *sk, struct canfd_frame *cf, int ae,
/* malformed PDU - report 'not a data message' */
sk->sk_err = EBADMSG;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
return 1;
}
@@ -758,7 +758,7 @@ static enum hrtimer_restart isotp_tx_timer_handler(struct hrtimer *hrtimer)
/* report 'communication error on send' */
sk->sk_err = ECOMM;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
/* reset tx state */
so->tx.state = ISOTP_IDLE;
@@ -801,10 +801,12 @@ isotp_tx_burst:
can_skb_set_owner(skb, sk);
can_send_ret = can_send(skb, 1);
- if (can_send_ret)
- pr_notice_once("can-isotp: %s: can_send_ret %d\n",
- __func__, can_send_ret);
-
+ if (can_send_ret) {
+ pr_notice_once("can-isotp: %s: can_send_ret %pe\n",
+ __func__, ERR_PTR(can_send_ret));
+ if (can_send_ret == -ENOBUFS)
+ pr_notice_once("can-isotp: tx queue is full, increasing txqueuelen may prevent this error\n");
+ }
if (so->tx.idx >= so->tx.len) {
/* we are done */
so->tx.state = ISOTP_IDLE;
@@ -950,8 +952,8 @@ static int isotp_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
err = can_send(skb, 1);
dev_put(dev);
if (err) {
- pr_notice_once("can-isotp: %s: can_send_ret %d\n",
- __func__, err);
+ pr_notice_once("can-isotp: %s: can_send_ret %pe\n",
+ __func__, ERR_PTR(err));
return err;
}
@@ -1028,9 +1030,6 @@ static int isotp_release(struct socket *sock)
lock_sock(sk);
- hrtimer_cancel(&so->txtimer);
- hrtimer_cancel(&so->rxtimer);
-
/* remove current filters & unregister */
if (so->bound && (!(so->opt.flags & CAN_ISOTP_SF_BROADCAST))) {
if (so->ifindex) {
@@ -1042,10 +1041,14 @@ static int isotp_release(struct socket *sock)
SINGLE_MASK(so->rxid),
isotp_rcv, sk);
dev_put(dev);
+ synchronize_rcu();
}
}
}
+ hrtimer_cancel(&so->txtimer);
+ hrtimer_cancel(&so->rxtimer);
+
so->ifindex = 0;
so->bound = 0;
@@ -1155,7 +1158,7 @@ out:
if (notify_enetdown) {
sk->sk_err = ENETDOWN;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
}
return err;
@@ -1354,13 +1357,13 @@ static void isotp_notify(struct isotp_sock *so, unsigned long msg,
sk->sk_err = ENODEV;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
break;
case NETDEV_DOWN:
sk->sk_err = ENETDOWN;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
break;
}
}
@@ -1482,7 +1485,7 @@ static __init int isotp_module_init(void)
err = can_proto_register(&isotp_can_proto);
if (err < 0)
- pr_err("can: registration of isotp protocol failed\n");
+ pr_err("can: registration of isotp protocol failed %pe\n", ERR_PTR(err));
else
register_netdevice_notifier(&canisotp_notifier);
diff --git a/net/can/j1939/main.c b/net/can/j1939/main.c
index da3a7a7bcff2..08c8606cfd9c 100644
--- a/net/can/j1939/main.c
+++ b/net/can/j1939/main.c
@@ -193,6 +193,10 @@ static void j1939_can_rx_unregister(struct j1939_priv *priv)
can_rx_unregister(dev_net(ndev), ndev, J1939_CAN_ID, J1939_CAN_MASK,
j1939_can_recv, priv);
+ /* The last reference of priv is dropped by the RCU deferred
+ * j1939_sk_sock_destruct() of the last socket, so we can
+ * safely drop this reference here.
+ */
j1939_priv_put(priv);
}
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c
index 56aa66147d5a..54f6d521492f 100644
--- a/net/can/j1939/socket.c
+++ b/net/can/j1939/socket.c
@@ -398,6 +398,9 @@ static int j1939_sk_init(struct sock *sk)
atomic_set(&jsk->skb_pending, 0);
spin_lock_init(&jsk->sk_session_queue_lock);
INIT_LIST_HEAD(&jsk->sk_session_queue);
+
+ /* j1939_sk_sock_destruct() depends on SOCK_RCU_FREE flag */
+ sock_set_flag(sk, SOCK_RCU_FREE);
sk->sk_destruct = j1939_sk_sock_destruct;
sk->sk_protocol = CAN_J1939;
@@ -673,7 +676,7 @@ static int j1939_sk_setsockopt(struct socket *sock, int level, int optname,
switch (optname) {
case SO_J1939_FILTER:
- if (!sockptr_is_null(optval)) {
+ if (!sockptr_is_null(optval) && optlen != 0) {
struct j1939_filter *f;
int c;
@@ -1009,7 +1012,7 @@ void j1939_sk_send_loop_abort(struct sock *sk, int err)
{
sk->sk_err = err;
- sk->sk_error_report(sk);
+ sk_error_report(sk);
}
static int j1939_sk_send_loop(struct j1939_priv *priv, struct sock *sk,
@@ -1189,7 +1192,7 @@ void j1939_sk_netdev_event_netdown(struct j1939_priv *priv)
list_for_each_entry(jsk, &priv->j1939_socks, list) {
jsk->sk.sk_err = error_code;
if (!sock_flag(&jsk->sk, SOCK_DEAD))
- jsk->sk.sk_error_report(&jsk->sk);
+ sk_error_report(&jsk->sk);
j1939_sk_queue_drop_all(priv, jsk, error_code);
}
diff --git a/net/can/proc.c b/net/can/proc.c
index d1fe49e6f16d..b3099f0a3cb8 100644
--- a/net/can/proc.c
+++ b/net/can/proc.c
@@ -99,8 +99,6 @@ static void can_init_stats(struct net *net)
static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
unsigned long count)
{
- unsigned long rate;
-
if (oldjif == newjif)
return 0;
@@ -111,9 +109,7 @@ static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
return 99999999;
}
- rate = (count * HZ) / (newjif - oldjif);
-
- return rate;
+ return (count * HZ) / (newjif - oldjif);
}
void can_stat_update(struct timer_list *t)
diff --git a/net/can/raw.c b/net/can/raw.c
index ac96fc210025..ed4fcb7ab0c3 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -295,13 +295,13 @@ static void raw_notify(struct raw_sock *ro, unsigned long msg,
sk->sk_err = ENODEV;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
break;
case NETDEV_DOWN:
sk->sk_err = ENETDOWN;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
break;
}
}
@@ -488,7 +488,7 @@ static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len)
if (notify_enetdown) {
sk->sk_err = ENETDOWN;
if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_error_report(sk);
+ sk_error_report(sk);
}
return err;
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-09 07:07:39 +0300