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Zhengchao Shao 72f2dc8993 bpf: Don't redirect packets with invalid pkt_len 
commit fd1894224407c484f652ad456e1ce423e89bb3eb upstream.

Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any
skbs, that is, the flow->head is null.
The root cause, as the [2] says, is because that bpf_prog_test_run_skb()
run a bpf prog which redirects empty skbs.
So we should determine whether the length of the packet modified by bpf
prog or others like bpf_prog_test is valid before forwarding it directly.

LINK: [1] https://syzkaller.appspot.com/bug?id=0b84da80c2917757915afa89f7738a9d16ec96c5
LINK: [2] https://www.spinics.net/lists/netdev/msg777503.html

Reported-by: syzbot+7a12909485b94426aceb@syzkaller.appspotmail.com
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20220715115559.139691-1-shaozhengchao@huawei.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-05 10:31:28 +02:00
..
6lowpan
net: don't include ndisc.h from ipv6.h
2022-02-04 14:15:11 -08:00
9p
net/9p: Initialize the iounit field during fid creation
2022-08-17 15:16:09 +02:00
802
…
8021q
vlan: fix memory leak in vlan_newlink()
2022-07-09 12:26:59 +01:00
appletalk
net: remove noblock parameter from skb_recv_datagram()
2022-04-06 13:45:26 +01:00
atm
net: SO_RCVMARK socket option for SO_MARK with recvmsg()
2022-04-28 13:08:15 -07:00
ax25
ax25: fix incorrect dev_tracker usage
2022-08-17 15:14:57 +02:00
batman-adv
batman-adv: tracing: Use the new __vstring() helper
2022-08-17 15:16:15 +02:00
bluetooth
Bluetooth: L2CAP: Fix build errors in some archs
2022-09-05 10:31:27 +02:00
bpf
bpf: Don't redirect packets with invalid pkt_len
2022-09-05 10:31:28 +02:00
bpfilter
uaccess: remove CONFIG_SET_FS
2022-02-25 09:36:06 +01:00
bridge
netfilter: ebtables: reject blobs that don't provide all entry points
2022-08-31 17:18:05 +02:00
caif
caif: Fix bitmap data type in "struct caifsock"
2022-07-22 12:51:45 +01:00
can
can: j1939: j1939_sk_queue_activate_next_locked(): replace WARN_ON_ONCE with netdev_warn_once()
2022-08-25 11:45:37 +02:00
ceph
libceph: use swap() macro instead of taking tmp variable
2022-05-25 20:45:13 +02:00
core
bpf: Don't redirect packets with invalid pkt_len
2022-09-05 10:31:28 +02:00
dcb
net: dcb: disable softirqs in dcbnl_flush_dev()
2022-03-03 08:01:55 -08:00
dccp
dccp: put dccp_qpolicy_full() and dccp_qpolicy_push() in the same lock
2022-08-17 15:14:59 +02:00
decnet
net: Fix data-races around sysctl_[rw]mem(_offset)?.
2022-07-25 12:42:09 +01:00
dns_resolver
…
dsa
net: dsa: don't warn in dsa_port_set_state_now() when driver doesn't support it
2022-08-25 11:45:34 +02:00
ethernet
net: ethernet: set default assignment identifier to NET_NAME_ENUM
2022-04-07 21:04:03 -07:00
ethtool
ethtool: Fix get module eeprom fallback
2022-06-17 20:22:16 -07:00
hsr
net: add per-cpu storage and net->core_stats
2022-03-11 23:17:24 -08:00
ieee802154
net: SO_RCVMARK socket option for SO_MARK with recvmsg()
2022-04-28 13:08:15 -07:00
ife
…
ipv4
net: Fix data-races around sysctl_devconf_inherit_init_net.
2022-08-31 17:18:09 +02:00
ipv6
net: Fix data-races around sysctl_devconf_inherit_init_net.
2022-08-31 17:18:09 +02:00
iucv
net: remove noblock parameter from skb_recv_datagram()
2022-04-06 13:45:26 +01:00
kcm
…
key
af_key: Do not call xfrm_probe_algs in parallel
2022-08-31 17:18:01 +02:00
l2tp
ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg
2022-06-08 10:56:43 -07:00
l3mdev
l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu
2022-04-15 14:27:24 -07:00
lapb
…
llc
llc: only change llc->dev when bind() succeeds
2022-03-25 16:55:41 -07:00
mac80211
wifi: mac80211: move some future per-link data to bss_conf
2022-08-17 15:14:46 +02:00
mac802154
net: mac802154: Fix symbol durations
2022-04-30 20:29:47 +02:00
mctp
Networking changes for 5.19.
2022-05-25 12:22:58 -07:00
mpls
net: mpls: fix memdup.cocci warning
2022-04-07 21:06:41 -07:00
mptcp
net: Fix data-races around sysctl_max_skb_frags.
2022-08-31 17:18:09 +02:00
ncsi
net/ncsi: use proper "mellanox" DT vendor prefix
2022-06-23 20:51:06 -07:00
netfilter
net: Fix data-races around sysctl_[rw]mem_(max|default).
2022-08-31 17:18:08 +02:00
netlabel
netlabel: fix out-of-bounds memory accesses
2022-03-21 10:59:11 +00:00
netlink
net: genl: fix error path memory leak in policy dumping
2022-08-25 11:45:34 +02:00
netrom
net: remove noblock parameter from skb_recv_datagram()
2022-04-06 13:45:26 +01:00
nfc
net: nfc: Directly use ida_alloc()/free()
2022-05-28 15:28:47 +01:00
nsh
…
openvswitch
net: openvswitch: fix parsing of nw_proto for IPv6 fragments
2022-06-23 11:44:01 +02:00
packet
net/af_packet: make sure to pull mac header
2022-06-02 10:15:05 -07:00
phonet
net: remove noblock parameter from recvmsg() entities
2022-04-12 15:00:25 +02:00
psample
…
qrtr
net: qrtr: start MHI channel after endpoit creation
2022-08-25 11:45:32 +02:00
rds
rds: add missing barrier to release_refill
2022-08-25 11:45:05 +02:00
rfkill
rfkill: make new event layout opt-in
2022-03-18 13:09:17 +02:00
rose
rose: check NULL rose_loopback_neigh->loopback
2022-08-31 17:18:02 +02:00
rxrpc
rxrpc: Fix locking in rxrpc's sendmsg
2022-08-31 17:18:11 +02:00
sched
net: Fix data-races around weight_p and dev_weight_[rt]x_bias.
2022-08-31 17:18:08 +02:00
sctp
sctp: leave the err path free in sctp_stream_init to sctp_stream_free
2022-07-27 18:23:22 -07:00
smc
tcp: Fix data-races around keepalive sysctl knobs.
2022-07-18 12:21:54 +01:00
strparser
…
sunrpc
SUNRPC: RPC level errors should set task->tk_rpc_status
2022-08-31 17:18:01 +02:00
switchdev
net: switchdev: remove lag_mod_cb from switchdev_handle_fdb_event_to_device
2022-02-24 21:31:43 -08:00
tipc
net: Fix data-races around sysctl_[rw]mem(_offset)?.
2022-07-25 12:42:09 +01:00
tls
net/tls: Remove the context from the list in tls_device_down
2022-07-24 21:40:56 +01:00
unix
af_unix: Fix a data-race in unix_dgram_peer_wake_me().
2022-06-07 12:07:46 +02:00
vmw_vsock
vsock: Set socket state back to SS_UNCONNECTED in vsock_connect_timeout()
2022-08-25 11:45:22 +02:00
wireless
wifi: cfg80211: remove chandef check in cfg80211_cac_event()
2022-08-17 15:16:20 +02:00
x25
x25: remove redundant pointer dev
2022-05-10 11:59:22 +02:00
xdp
xsk: Clear page contiguity bit when unmapping pool
2022-06-28 22:49:04 +02:00
xfrm
net: Fix data-races around netdev_max_backlog.
2022-08-31 17:18:08 +02:00
compat.c
…
devres.c
…
Kconfig
page_pool: Add allocation stats
2022-03-03 09:55:28 +00:00
Kconfig.debug
net: CONFIG_DEBUG_NET depends on CONFIG_NET
2022-06-02 10:15:05 -07:00
Makefile
…
socket.c
net: Fix a data-race around sysctl_somaxconn.
2022-08-31 17:18:10 +02:00
sysctl_net.c
…