Maxim Mikityanskiy 96dee90a9d xsk: Add rcu_read_lock around the XSK wakeup ... [ Upstream commit 0687068208 ] The XSK wakeup callback in drivers makes some sanity checks before triggering NAPI. However, some configuration changes may occur during this function that affect the result of those checks. For example, the interface can go down, and all the resources will be destroyed after the checks in the wakeup function, but before it attempts to use these resources. Wrap this callback in rcu_read_lock to allow driver to synchronize_rcu before actually destroying the resources. xsk_wakeup is a new function that encapsulates calling ndo_xsk_wakeup wrapped into the RCU lock. After this commit, xsk_poll starts using xsk_wakeup and checks xs->zc instead of ndo_xsk_wakeup != NULL to decide ndo_xsk_wakeup should be called. It also fixes a bug introduced with the need_wakeup feature: a non-zero-copy socket may be used with a driver supporting zero-copy, and in this case ndo_xsk_wakeup should not be called, so the xs->zc check is the correct one. Fixes: 77cd0d7b3f ("xsk: add support for need_wakeup flag in AF_XDP rings") Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com> Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20191217162023.16011-2-maximmi@mellanox.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-01-12 12:21:41 +01:00
..
6lowpan	6lowpan: no need to check return value of debugfs_create functions	2019-07-06 12:50:01 +02:00
9p	9p pull request for inclusion in 5.4	2019-09-27 15:10:34 -07:00
802	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
8021q	net: remove unnecessary variables and callback	2019-10-24 14:53:49 -07:00
appletalk	appletalk: enforce CAP_NET_RAW for raw sockets	2019-09-24 16:37:18 +02:00
atm	net: atm: Reduce the severity of logging in unlink_clip_vcc	2019-11-18 17:08:20 -08:00
ax25	ax25: enforce CAP_NET_RAW for raw sockets	2019-09-24 16:37:18 +02:00
batman-adv	Here are two batman-adv bugfixes:	2019-10-28 16:39:07 -07:00
bluetooth	Bluetooth: Fix memory leak in hci_connect_le_scan	2020-01-09 10:20:04 +01:00
bpf	bpf/flow_dissector: support flags in BPF_PROG_TEST_RUN	2019-07-25 18:00:41 -07:00
bpfilter	Kbuild updates for v5.3	2019-07-12 16:03:16 -07:00
bridge	net: add bool confirm_neigh parameter for dst_ops.update_pmtu	2020-01-04 19:18:58 +01:00
caif	net: use skb_queue_empty_lockless() in poll() handlers	2019-10-28 13:33:41 -07:00
can	can: j1939: j1939_sk_bind(): take priv after lock is held	2019-12-31 16:45:56 +01:00
ceph	libceph: use ceph_kvmalloc() for osdmap arrays	2019-09-16 12:06:25 +02:00
core	bpf: Clear skb->tstamp in bpf_redirect when necessary	2020-01-12 12:21:31 +01:00
dcb	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201	2019-05-30 11:29:52 -07:00
dccp	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
decnet	net: add bool confirm_neigh parameter for dst_ops.update_pmtu	2020-01-04 19:18:58 +01:00
dns_resolver	Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"	2019-07-10 18:43:43 -07:00
dsa	net: dsa: tag_8021q: Fix dsa_8021q_restore_pvid for an absent pvid	2019-11-16 12:23:53 -08:00
ethernet	net: add annotations on hh->hh_len lockless accesses	2020-01-09 10:20:06 +01:00
hsr	hsr: fix a race condition in node list insertion and deletion	2020-01-09 10:20:07 +01:00
ieee802154	net: core: add generic lockdep keys	2019-10-24 14:53:48 -07:00
ife	net: Fix Kconfig indentation	2019-09-26 08:56:17 +02:00
ipv4	net: annotate lockless accesses to sk->sk_pacing_shift	2020-01-09 10:20:07 +01:00
ipv6	ipv6/addrconf: only check invalid header values when NETLINK_F_STRICT_CHK is set	2020-01-04 19:19:17 +01:00
iucv	net/af_iucv: mark expected switch fall-throughs	2019-07-29 10:26:14 -07:00
kcm	kcm: disable preemption in kcm_parse_func_strparser()	2019-09-27 10:27:14 +02:00
key	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-07-08 19:48:57 -07:00
l2tp	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
l3mdev	ipv6: convert major tx path to use RT6_LOOKUP_F_DST_NOREF	2019-06-23 13:24:17 -07:00
lapb	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-17 20:20:36 -07:00
llc	net: silence KCSAN warnings around sk_add_backlog() calls	2019-10-09 21:42:59 -07:00
mac80211	mac80211: fix TID field in monitor mode transmit	2020-01-12 12:21:28 +01:00
mac802154	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
mpls	net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup	2019-12-18 16:08:42 +01:00
ncsi	net/ncsi: Disable global multicast filter	2019-09-19 18:04:40 -07:00
netfilter	netfilter: nf_tables_offload: return EOPNOTSUPP if rule specifies no actions	2020-01-12 12:21:18 +01:00
netlabel	netlabel: remove redundant assignment to pointer iter	2019-09-01 11:45:02 -07:00
netlink	net: remove empty netlink_tap_exit_net	2019-06-14 19:50:33 -07:00
netrom	net: core: add generic lockdep keys	2019-10-24 14:53:48 -07:00
nfc	net: nfc: nci: fix a possible sleep-in-atomic-context bug in nci_uart_tty_receive()	2019-12-31 16:41:23 +01:00
nsh	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
openvswitch	net: Fixed updating of ethertype in skb_mpls_push()	2019-12-18 16:08:56 +01:00
packet	af_packet: set defaule value for tmo	2019-12-31 16:41:12 +01:00
phonet	net: use skb_queue_empty_lockless() in poll() handlers	2019-10-28 13:33:41 -07:00
psample	net: psample: fix skb_over_panic	2019-12-04 22:30:54 +01:00
qrtr	net: qrtr: Stop rx_worker before freeing node	2019-09-21 18:45:46 -07:00
rds	rds: ib: update WR sizes when bringing up connection	2019-11-16 12:59:08 -08:00
rfkill	rfkill: Fix incorrect check to avoid NULL pointer dereference	2020-01-12 12:21:33 +01:00
rose	net: core: add generic lockdep keys	2019-10-24 14:53:48 -07:00
rxrpc	rxrpc: Fix handling of last subpacket of jumbo packet	2019-10-31 12:23:09 -07:00
sched	net/sched: annotate lockless accesses to qdisc->empty	2020-01-09 10:20:02 +01:00
sctp	net: add bool confirm_neigh parameter for dst_ops.update_pmtu	2020-01-04 19:18:58 +01:00
smc	net/smc: add fallback check to connect()	2020-01-04 19:18:37 +01:00
strparser	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
sunrpc	sunrpc: fix crash when cache_head become valid before update	2020-01-09 10:20:01 +01:00
switchdev	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
tipc	net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup	2019-12-18 16:08:42 +01:00
tls	net/tls: Fix return values to avoid ENOTSUPP	2019-12-18 16:08:31 +01:00
unix	net: use skb_queue_empty_lockless() in poll() handlers	2019-10-28 13:33:41 -07:00
vmw_vsock	vsock/virtio: fix sock refcnt holding during the shutdown	2019-11-08 12:17:50 -08:00
wimax	wimax: no need to check return value of debugfs_create functions	2019-08-10 15:25:47 -07:00
wireless	cfg80211: fix double-free after changing network namespace	2020-01-12 12:21:28 +01:00
x25	net: silence KCSAN warnings around sk_add_backlog() calls	2019-10-09 21:42:59 -07:00
xdp	xsk: Add rcu_read_lock around the XSK wakeup	2020-01-12 12:21:41 +01:00
xfrm	xfrm: release device reference for invalid state	2019-11-12 08:24:38 +01:00
Kconfig	devlink: Add packet trap infrastructure	2019-08-17 12:40:08 -07:00
Makefile	net: split out functions related to registering inflight socket files	2019-02-28 08:24:23 -07:00
compat.c	uio: make import_iovec()/compat_import_iovec() return bytes on success	2019-05-31 15:30:03 -06:00
socket.c	net: make socket read/write_iter() honor IOCB_NOWAIT	2020-01-09 10:19:47 +01:00
sysctl_net.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00