summaryrefslogtreecommitdiff
path: root/net/dsa/dsa2.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2022-02-11 03:01:22 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-02-11 03:01:22 +0300
commitf1baf68e1383f6ed93eb9cff2866d46562607a43 (patch)
tree96147de4ecc00475e0684c2aaa5dcaae9898da32 /net/dsa/dsa2.c
parent16f7432c884bb7882f0534cb8b9c38cdbccc37bc (diff)
parent51a04ebf21122d5c76a716ecd9bfc33ea44b2b39 (diff)
downloadlinux-f1baf68e1383f6ed93eb9cff2866d46562607a43.tar.xz
Merge tag 'net-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski: "Including fixes from netfilter and can. Current release - new code bugs: - sparx5: fix get_stat64 out-of-bound access and crash - smc: fix netdev ref tracker misuse Previous releases - regressions: - eth: ixgbevf: require large buffers for build_skb on 82599VF, avoid overflows - eth: ocelot: fix all IP traffic getting trapped to CPU with PTP over IP - bonding: fix rare link activation misses in 802.3ad mode Previous releases - always broken: - tcp: fix tcp sock mem accounting in zero-copy corner cases - remove the cached dst when uncloning an skb dst and its metadata, since we only have one ref it'd lead to an UaF - netfilter: - conntrack: don't refresh sctp entries in closed state - conntrack: re-init state for retransmitted syn-ack, avoid connection establishment getting stuck with strange stacks - ctnetlink: disable helper autoassign, avoid it getting lost - nft_payload: don't allow transport header access for fragments - dsa: fix use of devres for mdio throughout drivers - eth: amd-xgbe: disable interrupts during pci removal - eth: dpaa2-eth: unregister netdev before disconnecting the PHY - eth: ice: fix IPIP and SIT TSO offload" * tag 'net-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (53 commits) net: dsa: mv88e6xxx: fix use-after-free in mv88e6xxx_mdios_unregister net: mscc: ocelot: fix mutex lock error during ethtool stats read ice: Avoid RTNL lock when re-creating auxiliary device ice: Fix KASAN error in LAG NETDEV_UNREGISTER handler ice: fix IPIP and SIT TSO offload ice: fix an error code in ice_cfg_phy_fec() net: mpls: Fix GCC 12 warning dpaa2-eth: unregister the netdev before disconnecting from the PHY skbuff: cleanup double word in comment net: macb: Align the dma and coherent dma masks mptcp: netlink: process IPv6 addrs in creating listening sockets selftests: mptcp: add missing join check net: usb: qmi_wwan: Add support for Dell DW5829e vlan: move dev_put into vlan_dev_uninit vlan: introduce vlan_dev_free_egress_priority ax25: fix UAF bugs of net_device caused by rebinding operation net: dsa: fix panic when DSA master device unbinds on shutdown net: amd-xgbe: disable interrupts during pci removal tipc: rate limit warning for received illegal binding update net: mdio: aspeed: Add missing MODULE_DEVICE_TABLE ...
Diffstat (limited to 'net/dsa/dsa2.c')
-rw-r--r--net/dsa/dsa2.c25
1 files changed, 6 insertions, 19 deletions
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 3d21521453fe..dcad3100b164 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -1718,7 +1718,6 @@ EXPORT_SYMBOL_GPL(dsa_unregister_switch);
void dsa_switch_shutdown(struct dsa_switch *ds)
{
struct net_device *master, *slave_dev;
- LIST_HEAD(unregister_list);
struct dsa_port *dp;
mutex_lock(&dsa2_mutex);
@@ -1729,25 +1728,13 @@ void dsa_switch_shutdown(struct dsa_switch *ds)
slave_dev = dp->slave;
netdev_upper_dev_unlink(master, slave_dev);
- /* Just unlinking ourselves as uppers of the master is not
- * sufficient. When the master net device unregisters, that will
- * also call dev_close, which we will catch as NETDEV_GOING_DOWN
- * and trigger a dev_close on our own devices (dsa_slave_close).
- * In turn, that will call dev_mc_unsync on the master's net
- * device. If the master is also a DSA switch port, this will
- * trigger dsa_slave_set_rx_mode which will call dev_mc_sync on
- * its own master. Lockdep will complain about the fact that
- * all cascaded masters have the same dsa_master_addr_list_lock_key,
- * which it normally would not do if the cascaded masters would
- * be in a proper upper/lower relationship, which we've just
- * destroyed.
- * To suppress the lockdep warnings, let's actually unregister
- * the DSA slave interfaces too, to avoid the nonsensical
- * multicast address list synchronization on shutdown.
- */
- unregister_netdevice_queue(slave_dev, &unregister_list);
}
- unregister_netdevice_many(&unregister_list);
+
+ /* Disconnect from further netdevice notifiers on the master,
+ * since netdev_uses_dsa() will now return false.
+ */
+ dsa_switch_for_each_cpu_port(dp, ds)
+ dp->master->dsa_ptr = NULL;
rtnl_unlock();
mutex_unlock(&dsa2_mutex);