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Zhengchao Shao 8b68e53d56 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 10:27:46 +02:00
..
6lowpan
6lowpan: iphc: Fix an off-by-one check of array index
2021-09-15 09:47:31 +02:00
9p
net/9p: Initialize the iounit field during fid creation
2022-08-25 11:18:17 +02:00
802
net/802/garp: fix memleak in garp_request_join()
2021-07-31 08:19:38 +02:00
8021q
net: vlan: fix underflow for the real_dev refcnt
2021-12-01 09:23:34 +01:00
appletalk
appletalk: Fix skb allocation size in loopback case
2021-04-07 14:47:41 +02:00
atm
atm: fix a memory leak of vcc->user_back
2020-10-01 13:17:58 +02:00
ax25
ax25: Fix UAF bugs in ax25 timers
2022-04-20 09:19:40 +02:00
batman-adv
batman-adv: Don't skb_split skbuffs with frag_list
2022-05-18 09:47:24 +02:00
bluetooth
Bluetooth: L2CAP: Fix build errors in some archs
2022-09-05 10:27:45 +02:00
bpf
bpf: Don't redirect packets with invalid pkt_len
2022-09-05 10:27:46 +02:00
bpfilter
bpfilter: Specify the log level for the kmsg message
2021-07-14 16:53:33 +02:00
bridge
netfilter: ebtables: reject blobs that don't provide all entry points
2022-09-05 10:27:41 +02:00
caif
net-caif: avoid user-triggerable WARN_ON(1)
2021-09-22 12:26:40 +02:00
can
can: j1939: j1939_session_destroy(): fix memory leak of skbs
2022-08-25 11:18:39 +02:00
ceph
libceph: clear con->out_msg on Policy::stateful_server faults
2020-11-05 11:43:34 +01:00
core
bpf: Don't redirect packets with invalid pkt_len
2022-09-05 10:27:46 +02:00
dcb
net: dcb: disable softirqs in dcbnl_flush_dev()
2022-03-08 19:07:51 +01:00
dccp
dccp: put dccp_qpolicy_full() and dccp_qpolicy_push() in the same lock
2022-08-25 11:17:49 +02:00
decnet
net: decnet: Fix sleeping inside in af_decnet
2021-07-28 13:30:56 +02:00
dns_resolver
KEYS: Don't write out to userspace while holding key semaphore
2020-04-23 10:36:45 +02:00
dsa
net: dsa: Add missing of_node_put() in dsa_port_parse_of
2022-03-23 09:12:07 +01:00
ethernet
…
hsr
hsr: use netdev_err() instead of WARN_ONCE()
2021-05-14 09:44:10 +02:00
ieee802154
net: ieee802154: Return meaningful error codes from the netlink helpers
2022-02-08 18:24:31 +01:00
ife
…
ipv4
tcp: fix over estimation in sk_forced_mem_schedule()
2022-08-25 11:18:17 +02:00
ipv6
net: ping6: Fix memleak in ipv6_renew_options().
2022-08-03 11:59:39 +02:00
iucv
net/af_iucv: remove WARN_ONCE on malformed RX packets
2021-03-07 12:20:42 +01:00
kcm
…
key
af_key: Do not call xfrm_probe_algs in parallel
2022-09-05 10:27:40 +02:00
l2tp
ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg
2022-06-22 14:11:21 +02:00
l3mdev
l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu
2022-04-27 13:50:47 +02:00
lapb
net: lapb: Copy the skb before sending a packet
2021-02-10 09:25:28 +01:00
llc
llc: only change llc->dev when bind() succeeds
2022-03-28 08:46:48 +02:00
mac80211
wifi: mac80211: fix queue selection for mesh/OCB interfaces
2022-07-21 20:59:17 +02:00
mac802154
net: mac802154: Fix general protection fault
2021-04-14 08:24:18 +02:00
mpls
net: mpls: Fix notifications when deleting a device
2021-12-08 09:01:12 +01:00
ncsi
net/ncsi: check for error return from call to nla_put_u32
2022-01-05 12:37:45 +01:00
netfilter
netfilter: nft_tunnel: restrict it to netdev family
2022-09-05 10:27:41 +02:00
netlabel
netlabel: fix out-of-bounds memory accesses
2022-04-15 14:18:35 +02:00
netlink
netlink: do not reset transport header in netlink_recvmsg()
2022-05-18 09:47:25 +02:00
netrom
netrom: Decrease sock refcount when sock timers expire
2021-07-28 13:30:56 +02:00
nfc
NFC: NULL out the dev->rfkill to prevent UAF
2022-06-14 18:11:33 +02:00
nsh
…
openvswitch
net: openvswitch: fix parsing of nw_proto for IPv6 fragments
2022-06-29 08:58:44 +02:00
packet
net/packet: fix packet_sock xmit return value checking
2022-04-27 13:50:47 +02:00
phonet
phonet: refcount leak in pep_sock_accep
2022-01-11 15:23:33 +01:00
psample
…
qrtr
net: qrtr: fix another OOB Read in qrtr_endpoint_post
2021-09-03 10:08:12 +02:00
rds
rds: add missing barrier to release_refill
2022-08-25 11:18:18 +02:00
rfkill
rfkill: Fix use-after-free in rfkill_resume()
2020-11-24 13:29:05 +01:00
rose
rose: check NULL rose_loopback_neigh->loopback
2022-09-05 10:27:40 +02:00
rxrpc
rxrpc: Fix decision on when to generate an IDLE ACK
2022-06-14 18:11:38 +02:00
sched
net: Fix data-races around weight_p and dev_weight_[rt]x_bias.
2022-09-05 10:27:41 +02:00
sctp
sctp: leave the err path free in sctp_stream_init to sctp_stream_free
2022-08-03 11:59:41 +02:00
smc
net/smc: postpone sk_refcnt increment in connect()
2022-06-14 18:11:39 +02:00
strparser
bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding
2021-11-17 09:48:48 +01:00
sunrpc
SUNRPC: RPC level errors should set task->tk_rpc_status
2022-09-05 10:27:40 +02:00
switchdev
net: switchdev: do not propagate bridge updates across bridges
2021-10-27 09:54:24 +02:00
tipc
net: tipc: fix possible refcount leak in tipc_sk_create()
2022-07-21 20:59:25 +02:00
tls
net/tls: Fix race in TLS device down flow
2022-07-29 17:14:12 +02:00
unix
af_unix: Fix a data-race in unix_dgram_peer_wake_me().
2022-06-14 18:11:57 +02:00
vmw_vsock
vsock: Set socket state back to SS_UNCONNECTED in vsock_connect_timeout()
2022-08-25 11:18:25 +02:00
wimax
…
wireless
nl80211: show SSID for P2P_GO interfaces
2022-06-14 18:11:32 +02:00
x25
net/x25: Fix null-ptr-deref caused by x25_disconnect
2022-04-15 14:18:21 +02:00
xdp
Revert "xsk: Do not sleep in poll() when need_wakeup set"
2021-12-22 09:29:40 +01:00
xfrm
xfrm: fix refcount leak in __xfrm_policy_check()
2022-09-05 10:27:39 +02:00
compat.c
net: Return the correct errno code
2021-06-18 09:59:00 +02:00
Kconfig
net: Fix CONFIG_NET_CLS_ACT=n and CONFIG_NFT_FWD_NETDEV={y, m} build
2020-04-01 11:02:18 +02:00
Makefile
…
socket.c
net: Fix a data-race around sysctl_somaxconn.
2022-09-05 10:27:42 +02:00
sysctl_net.c
…