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Merge branch 'can-fixes-for-6-5-rc7'

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Oliver Hartkopp says:

====================
CAN fixes for 6.5-rc7

The isotp fix removes an unnecessary check which leads to delays and/or
a wrong error notification.

The fix for the CAN_RAW socket solves the last issue that has been
introduced with commit ee8b94c851 ("can: raw: fix receiver memory leak")
in this upstream cycle (detected by Eric Dumazet).
====================

Link: https://lore.kernel.org/r/20230821144547.6658-1-socketcan@hartkopp.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2023-08-22 17:18:56 -07:00
commit c8777fa6f3
2 changed files with 33 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
net/can/isotp.c
View File

@ -188,12 +188,6 @@ static bool isotp_register_rxid(struct isotp_sock *so)
return (isotp_bc_flags(so) == 0);
}
static bool isotp_register_txecho(struct isotp_sock *so)
{
/* all modes but SF_BROADCAST register for tx echo skbs */
return (isotp_bc_flags(so) != CAN_ISOTP_SF_BROADCAST);
}
static enum hrtimer_restart isotp_rx_timer_handler(struct hrtimer *hrtimer)
{
struct isotp_sock *so = container_of(hrtimer, struct isotp_sock,
@ -1209,7 +1203,7 @@ static int isotp_release(struct socket *sock)
lock_sock(sk);
/* remove current filters & unregister */
if (so->bound && isotp_register_txecho(so)) {
if (so->bound) {
if (so->ifindex) {
struct net_device *dev;
@ -1332,14 +1326,12 @@ static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len)
can_rx_register(net, dev, rx_id, SINGLE_MASK(rx_id),
isotp_rcv, sk, "isotp", sk);
if (isotp_register_txecho(so)) {
/* no consecutive frame echo skb in flight */
so->cfecho = 0;
/* register for echo skb's */
can_rx_register(net, dev, tx_id, SINGLE_MASK(tx_id),
isotp_rcv_echo, sk, "isotpe", sk);
}
dev_put(dev);
@ -1560,7 +1552,7 @@ static void isotp_notify(struct isotp_sock *so, unsigned long msg,
case NETDEV_UNREGISTER:
lock_sock(sk);
/* remove current filters & unregister */
if (so->bound && isotp_register_txecho(so)) {
if (so->bound) {
if (isotp_register_rxid(so))
can_rx_unregister(dev_net(dev), dev, so->rxid,
SINGLE_MASK(so->rxid),

33
net/can/raw.c
View File

@ -85,6 +85,7 @@ struct raw_sock {
int bound;
int ifindex;
struct net_device *dev;
netdevice_tracker dev_tracker;
struct list_head notifier;
int loopback;
int recv_own_msgs;
@ -285,8 +286,10 @@ static void raw_notify(struct raw_sock *ro, unsigned long msg,
case NETDEV_UNREGISTER:
lock_sock(sk);
/* remove current filters & unregister */
if (ro->bound)
if (ro->bound) {
raw_disable_allfilters(dev_net(dev), dev, sk);
netdev_put(dev, &ro->dev_tracker);
}
if (ro->count > 1)
kfree(ro->filter);
@ -391,11 +394,13 @@ static int raw_release(struct socket *sock)
/* remove current filters & unregister */
if (ro->bound) {
if (ro->dev)
if (ro->dev) {
raw_disable_allfilters(dev_net(ro->dev), ro->dev, sk);
else
netdev_put(ro->dev, &ro->dev_tracker);
} else {
raw_disable_allfilters(sock_net(sk), NULL, sk);
}
}
if (ro->count > 1)
kfree(ro->filter);
@ -445,10 +450,10 @@ static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len)
goto out;
}
if (dev->type != ARPHRD_CAN) {
dev_put(dev);
err = -ENODEV;
goto out;
goto out_put_dev;
}
if (!(dev->flags & IFF_UP))
notify_enetdown = 1;
@ -456,7 +461,9 @@ static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len)
/* filters set by default/setsockopt */
err = raw_enable_allfilters(sock_net(sk), dev, sk);
dev_put(dev);
if (err)
goto out_put_dev;
} else {
ifindex = 0;
@ -467,17 +474,27 @@ static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len)
if (!err) {
if (ro->bound) {
/* unregister old filters */
if (ro->dev)
if (ro->dev) {
raw_disable_allfilters(dev_net(ro->dev),
ro->dev, sk);
else
/* drop reference to old ro->dev */
netdev_put(ro->dev, &ro->dev_tracker);
} else {
raw_disable_allfilters(sock_net(sk), NULL, sk);
}
}
ro->ifindex = ifindex;
ro->bound = 1;
/* bind() ok -> hold a reference for new ro->dev */
ro->dev = dev;
if (ro->dev)
netdev_hold(ro->dev, &ro->dev_tracker, GFP_KERNEL);
}
out_put_dev:
/* remove potential reference from dev_get_by_index() */
if (dev)
dev_put(dev);
out:
release_sock(sk);
rtnl_unlock();