Björn Töpel 36ccdf8582 net, xsk: Avoid taking multiple skbuff references ... Commit 642e450b6b ("xsk: Do not discard packet when NETDEV_TX_BUSY") addressed the problem that packets were discarded from the Tx AF_XDP ring, when the driver returned NETDEV_TX_BUSY. Part of the fix was bumping the skbuff reference count, so that the buffer would not be freed by dev_direct_xmit(). A reference count larger than one means that the skbuff is "shared", which is not the case. If the "shared" skbuff is sent to the generic XDP receive path, netif_receive_generic_xdp(), and pskb_expand_head() is entered the BUG_ON(skb_shared(skb)) will trigger. This patch adds a variant to dev_direct_xmit(), __dev_direct_xmit(), where a user can select the skbuff free policy. This allows AF_XDP to avoid bumping the reference count, but still keep the NETDEV_TX_BUSY behavior. Fixes: 642e450b6b ("xsk: Do not discard packet when NETDEV_TX_BUSY") Reported-by: Yonghong Song <yhs@fb.com> Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20201123175600.146255-1-bjorn.topel@gmail.com		2020-11-24 22:39:56 +01:00
..
6lowpan
9p	net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid	2020-10-12 10:05:47 +02:00
802
8021q	net: vlan: Fixed signedness in vlan_group_prealloc_vid()	2020-09-28 00:51:39 -07:00
appletalk	appletalk: Fix atalk_proc_init() return path	2020-08-03 15:48:32 -07:00
atm	net: atm: fix update of position index in lec_seq_next	2020-10-31 12:26:30 -07:00
ax25
batman-adv	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
bluetooth	Bluetooth: Replace zero-length array with flexible-array member	2020-10-29 17:22:59 -05:00
bpf	bpf: fix raw_tp test run in preempt kernel	2020-09-30 08:34:08 -07:00
bpfilter	Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH"	2020-10-15 12:33:24 -07:00
bridge	net: bridge: add missing counters to ndo_get_stats64 callback	2020-11-16 15:47:50 -08:00
caif	caif: Remove duplicate macro SRVL_CTRL_PKT_SIZE	2020-09-05 15:57:05 -07:00
can	can: af_can: prevent potential access of uninitialized member in canfd_rcv()	2020-11-15 18:24:33 +01:00
ceph	libceph: clear con->out_msg on Policy::stateful_server faults	2020-10-12 15:29:27 +02:00
core	net, xsk: Avoid taking multiple skbuff references	2020-11-24 22:39:56 +01:00
dcb	net: DCB: Validate DCB_ATTR_DCB_BUFFER argument	2020-09-10 15:09:08 -07:00
dccp	inet: remove icsk_ack.blocked	2020-09-30 14:21:30 -07:00
decnet	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
dns_resolver
dsa	net: dsa: tag_ksz: KSZ8795 and KSZ9477 also use tail tags	2020-10-19 17:32:50 -07:00
ethernet
ethtool	ethtool: netlink: add missing netdev_features_change() call	2020-11-09 17:15:34 -08:00
hsr	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
ieee802154	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
ife
ipv4	Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2020-11-19 12:26:10 -08:00
ipv6	ipv6: Remove dependency of ipv6_frag_thdr_truncated on ipv6 module	2020-11-19 10:49:50 -08:00
iucv	net/af_iucv: fix null pointer dereference on shutdown	2020-11-10 18:08:17 -08:00
kcm
key	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-08-02 01:02:12 -07:00
l2tp	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
l3mdev	net: Fix some comments	2020-08-27 07:55:59 -07:00
lapb
llc
mac80211	mac80211: free sta in sta_info_insert_finish() on errors	2020-11-13 09:48:32 +01:00
mac802154	Merge tag 'ieee802154-for-davem-2020-09-08' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan	2020-09-08 20:12:58 -07:00
mpls	mpls: load mpls_gso after mpls_iptunnel	2020-10-20 21:16:45 -07:00
mptcp	mptcp: provide rmem[0] limit	2020-11-09 17:34:34 -08:00
ncsi	net/ncsi: Fix netlink registration	2020-11-12 17:00:13 -08:00
netfilter	netfilter: ipset: Update byte and packet counters regardless of whether they match	2020-10-31 11:11:11 +01:00
netlabel	netlabel: fix an uninitialized warning in netlbl_unlabel_staticlist()	2020-11-14 12:07:57 -08:00
netlink	netlink: export policy in extended ACK	2020-10-09 20:22:32 -07:00
netrom	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
nfc	nfc: Ensure presence of NFC_ATTR_FIRMWARE_NAME attribute in nfc_genl_fw_download()	2020-10-20 17:06:22 -07:00
nsh
openvswitch	net: openvswitch: silence suspicious RCU usage warning	2020-11-03 16:57:42 -08:00
packet	net/packet: Fix a comment about network_header	2020-09-19 16:40:48 -07:00
phonet	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
psample	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
qrtr	net: qrtr: ns: Fix the incorrect usage of rcu_read_lock()	2020-10-06 06:01:35 -07:00
rds	RDMA: Add rdma_connect_locked()	2020-10-28 09:14:49 -03:00
rfkill	rfkill: Fix use-after-free in rfkill_resume()	2020-11-12 09:18:06 +01:00
rose	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
rxrpc	rxrpc: Fix loss of final ack on shutdown	2020-10-15 13:28:00 +01:00
sched	netem: fix zero division in tabledist	2020-10-29 11:45:47 -07:00
sctp	sctp: change to hold/put transport for proto_unreach_timer	2020-11-14 11:57:12 -08:00
smc	net/smc: fix direct access to ib_gid_addr->ndev in smc_ib_determine_gid()	2020-11-19 10:59:19 -08:00
strparser
sunrpc	net/sunrpc: fix useless comparison in proc_do_xprt()	2020-11-08 16:28:25 -05:00
switchdev	net: switchdev: Fixed kerneldoc warning	2020-09-23 17:46:31 -07:00
tipc	tipc: fix memory leak in tipc_topsrv_start()	2020-11-11 14:39:23 -08:00
tls	net/tls: Fix wrong record sn in async mode of device resync	2020-11-17 14:41:20 -08:00
unix	networking changes for the 5.10 merge window	2020-10-15 18:42:13 -07:00
vmw_vsock	vsock: forward all packets to the host when no H2G is registered	2020-11-14 11:33:39 -08:00
wimax	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
wireless	cfg80211: regulatory: Fix inconsistent format argument	2020-10-30 10:06:56 +01:00
x25	net: x25: Increase refcnt of "struct x25_neigh" in x25_rx_call_request	2020-11-12 18:01:40 -08:00
xdp	net, xsk: Avoid taking multiple skbuff references	2020-11-24 22:39:56 +01:00
xfrm	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec	2020-11-04 08:12:52 -08:00
compat.c	iov_iter: transparently handle compat iovecs in import_iovec	2020-10-03 00:02:13 -04:00
devres.c
Kconfig	drop_monitor: Convert to using devlink tracepoint	2020-09-30 18:01:26 -07:00
Makefile
socket.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-10-05 18:40:01 -07:00
sysctl_net.c