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torvalds-linux/include/net
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Eric Dumazet 4fe5a00ec7 net: sched: fix TCF_LAYER_TRANSPORT handling in tcf_get_base_ptr() 
syzbot reported that tcf_get_base_ptr() can be called while transport
header is not set [1].

Instead of returning a dangling pointer, return NULL.

Fix tcf_get_base_ptr() callers to handle this NULL value.

[1]
 WARNING: CPU: 1 PID: 6019 at ./include/linux/skbuff.h:3071 skb_transport_header include/linux/skbuff.h:3071 [inline]
 WARNING: CPU: 1 PID: 6019 at ./include/linux/skbuff.h:3071 tcf_get_base_ptr include/net/pkt_cls.h:539 [inline]
 WARNING: CPU: 1 PID: 6019 at ./include/linux/skbuff.h:3071 em_nbyte_match+0x2d8/0x3f0 net/sched/em_nbyte.c:43
Modules linked in:
CPU: 1 UID: 0 PID: 6019 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Call Trace:
 <TASK>
  tcf_em_match net/sched/ematch.c:494 [inline]
  __tcf_em_tree_match+0x1ac/0x770 net/sched/ematch.c:520
  tcf_em_tree_match include/net/pkt_cls.h:512 [inline]
  basic_classify+0x115/0x2d0 net/sched/cls_basic.c:50
  tc_classify include/net/tc_wrapper.h:197 [inline]
  __tcf_classify net/sched/cls_api.c:1764 [inline]
  tcf_classify+0x4cf/0x1140 net/sched/cls_api.c:1860
  multiq_classify net/sched/sch_multiq.c:39 [inline]
  multiq_enqueue+0xfd/0x4c0 net/sched/sch_multiq.c:66
  dev_qdisc_enqueue+0x4e/0x260 net/core/dev.c:4118
  __dev_xmit_skb net/core/dev.c:4214 [inline]
  __dev_queue_xmit+0xe83/0x3b50 net/core/dev.c:4729
  packet_snd net/packet/af_packet.c:3076 [inline]
  packet_sendmsg+0x3e33/0x5080 net/packet/af_packet.c:3108
  sock_sendmsg_nosec net/socket.c:727 [inline]
  __sock_sendmsg+0x21c/0x270 net/socket.c:742
  ____sys_sendmsg+0x505/0x830 net/socket.c:2630

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: syzbot+f3a497f02c389d86ef16@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/netdev/6920855a.a70a0220.2ea503.0058.GAE@google.com/T/#u
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20251121154100.1616228-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-11-24 18:53:14 -08:00
..
9p
…
bluetooth
Bluetooth: hci_core: lookup hci_conn on RX path on protocol side
2025-11-20 17:01:09 -05:00
caif
…
iucv
net: reformat kdoc return statements
2024-12-09 14:44:59 -08:00
libeth
libeth: xdp: Disable generic kCFI pass for libeth_xdp_tx_xmit_bulk()
2025-10-29 20:04:55 -07:00
mana
net: mana: Use page pool fragments for RX buffers instead of full pages to improve memory efficiency.
2025-08-19 14:42:44 +02:00
netfilter
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-09-11 17:40:13 -07:00
netns
tcp: accecn: AccECN option send control
2025-09-18 08:47:52 +02:00
nfc
net: nfc: nci: Increase NCI_DATA_TIMEOUT to 3000 ms
2025-09-03 17:02:12 -07:00
page_pool
net: add helper to pre-check if PP for an Rx queue will be unreadable
2025-09-04 10:19:17 +02:00
phonet
…
psp
net: psp: don't assume reply skbs will have a socket
2025-10-03 10:23:50 -07:00
sctp
sctp: Convert cookie authentication to use HMAC-SHA256
2025-08-19 19:36:26 -07:00
tc_act
net_sched: act_skbmod: use RCU in tcf_skbmod_dump()
2025-08-28 16:46:23 -07:00
6lowpan.h
…
act_api.h
net_sched: act: remove tcfa_qstats
2025-09-02 15:52:24 -07:00
addrconf.h
ipv6: Add __in6_dev_get_rtnl_net().
2025-01-20 12:16:04 -08:00
af_ieee802154.h
…
af_rxrpc.h
rxrpc: Remove deadcode
2025-04-24 17:03:45 -07:00
af_unix.h
af_unix: Introduce SO_INQ.
2025-07-08 18:05:25 -07:00
af_vsock.h
vsock: fix vsock_proto declaration
2025-07-07 16:55:54 -07:00
ah.h
…
aligned_data.h
udp: move udp_memory_allocated into net_aligned_data
2025-07-02 14:22:02 -07:00
amt.h
…
arp.h
…
atmclip.h
…
ax25.h
ax25: Remove broken autobind
2025-03-24 10:26:53 +00:00
ax88796.h
…
bareudp.h
…
bond_3ad.h
bonding: support aggregator selection based on port priority
2025-09-09 10:56:02 +02:00
bond_alb.h
…
bond_options.h
bonding: add support for per-port LACP actor priority
2025-09-09 10:56:02 +02:00
bonding.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-10-01 10:14:49 +02:00
bpf_sk_storage.h
…
busy_poll.h
net: gro: decouple GRO from the NAPI layer
2025-02-27 14:03:14 +01:00
calipso.h
…
cfg80211-wext.h
…
cfg80211.h
wifi: cfg80211: add an hrtimer based delayed work item
2025-10-28 14:56:30 +01:00
cfg802154.h
…
checksum.h
net: Fix checksum update for ILA adj-transport
2025-05-30 19:53:51 -07:00
cipso_ipv4.h
…
cls_cgroup.h
net/cls_cgroup: Fix task_get_classid() during qdisc run
2025-09-14 11:55:04 -07:00
codel_impl.h
…
codel_qdisc.h
…
codel.h
…
compat.h
…
datalink.h
…
dcbevent.h
…
dcbnl.h
…
devlink.h
devlink: Add a 'num_doorbells' driverinit param
2025-09-17 18:30:51 -07:00
dropreason-core.h
tcp: add datapath logic for PSP with inline key exchange
2025-09-18 12:32:06 +02:00
dropreason.h
wifi: mac80211: Drop cooked monitor support
2025-02-11 11:58:17 +01:00
dsa_stubs.h
…
dsa.h
net: dsa: tag_brcm: add support for legacy FCS tags
2025-06-17 17:52:01 -07:00
dscp.h
…
dsfield.h
…
dst_cache.h
…
dst_metadata.h
net: dst_metadata: fix IP_DF bit not extracted from tunnel headers
2025-09-14 14:28:12 -07:00
dst_ops.h
…
dst.h
net: dst: introduce dst->dev_rcu
2025-08-29 19:36:31 -07:00
eee.h
…
erspan.h
…
esp.h
…
espintcp.h
…
ethoc.h
…
failover.h
…
fib_notifier.h
…
fib_rules.h
net: fib_rules: Fix iif / oif matching on L3 master device
2025-04-15 17:54:56 -07:00
firewire.h
…
flow_dissector.h
…
flow_offload.h
…
flow.h
ipv4: Convert ->flowi4_tos to dscp_t.
2025-08-26 17:34:31 -07:00
fou.h
…
fq_impl.h
…
fq.h
…
garp.h
…
gen_stats.h
…
genetlink.h
genetlink: fix typo in comment
2025-09-03 15:16:49 -07:00
geneve.h
…
gre.h
…
gro_cells.h
…
gro.h
net: gro: remove unnecessary df checks
2025-09-25 12:42:49 +02:00
gso.h
…
gtp.h
…
gue.h
…
handshake.h
…
hotdata.h
net: add NUMA awareness to skb_attempt_defer_free()
2025-09-30 15:45:53 +02:00
hwbm.h
…
icmp.h
ipv4: icmp: Pass IPv4 control block structure as an argument to __icmp_send()
2025-09-11 12:22:38 +02:00
ieee8021q.h
…
ieee80211_radiotap.h
…
ieee802154_netdev.h
…
if_inet6.h
…
ife.h
…
inet6_connection_sock.h
tcp/dccp: Remove inet_connection_sock_af_ops.addr2sockaddr().
2025-03-24 12:10:13 -07:00
inet6_hashtables.h
tcp: Remove inet6_hash().
2025-09-22 11:38:43 -07:00
inet_common.h
…
inet_connection_sock.h
tcp: Update bind bucket state on port release
2025-09-23 10:12:15 +02:00
inet_dscp.h
ipv4: Convert ->flowi4_tos to dscp_t.
2025-08-26 17:34:31 -07:00
inet_ecn.h
…
inet_frag.h
inet: frags: change inet_frag_kill() to defer refcount updates
2025-03-18 13:18:36 +01:00
inet_hashtables.h
tcp: Update bind bucket state on port release
2025-09-23 10:12:15 +02:00
inet_sock.h
sctp: Prepare sctp_v4_get_dst() to dscp_t conversion.
2025-01-06 13:49:38 -08:00
inet_timewait_sock.h
tcp: Update bind bucket state on port release
2025-09-23 10:12:15 +02:00
inetpeer.h
inetpeer: remove create argument of inet_getpeer()
2024-12-17 19:37:00 -08:00
ioam6.h
…
ip6_checksum.h
…
ip6_fib.h
ipv6: Defer fib6_purge_rt() in fib6_add_rt2node() to fib6_add().
2025-04-24 09:29:56 +02:00
ip6_route.h
ipv6: make ipv6_pinfo.daddr_cache a boolean
2025-09-18 10:17:09 +02:00
ip6_tunnel.h
ipv6: adopt skb_dst_dev() and skb_dst_dev_net[_rcu]() helpers
2025-07-02 14:32:30 -07:00
ip_fib.h
ipv4: Convert ->flowi4_tos to dscp_t.
2025-08-26 17:34:31 -07:00
ip_tunnels.h
net/ip6_tunnel: Prevent perpetual tunnel growth
2025-10-13 17:43:46 -07:00
ip_vs.h
ipvs: Fix estimator kthreads preferred affinity
2025-08-13 08:34:33 +02:00
ip.h
net: snmp: remove SNMP_MIB_SENTINEL
2025-09-08 18:06:21 -07:00
ipcomp.h
xfrm: ipcomp: Use crypto_acomp interface
2025-03-21 17:36:49 +08:00
ipconfig.h
…
ipv6_frag.h
inet: frags: change inet_frag_kill() to defer refcount updates
2025-03-18 13:18:36 +01:00
ipv6_stubs.h
…
ipv6.h
ipv6: fix _DEVADD() and _DEVUPD() macros
2025-03-25 07:31:24 -07:00
iw_handler.h
…
kcm.h
net: kcm: Fix race condition in kcm_unattach()
2025-08-13 18:18:33 -07:00
l3mdev.h
net: fib_rules: Fix iif / oif matching on L3 master device
2025-04-15 17:54:56 -07:00
lag.h
…
lapb.h
net: lapb: increase LAPB_HEADER_LEN
2024-12-06 17:43:08 -08:00
llc_c_ac.h
…
llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h
…
llc_if.h
…
llc_pdu.h
…
llc_s_ac.h
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
…
llc.h
…
lwtunnel.h
net: dst: annotate data-races around dst->output
2025-07-02 14:32:30 -07:00
mac80211.h
wifi: mac80211: Export an API to check if NAN is started
2025-09-19 11:26:23 +02:00
mac802154.h
…
macsec.h
net: macsec: Add endianness annotations in salt struct
2025-01-20 12:20:42 +00:00
mctp.h
net: mctp: Allow limiting binds to a peer address
2025-07-15 12:08:39 +02:00
mctpdevice.h
…
mip6.h
…
mld.h
…
mpls_iptunnel.h
…
mpls.h
…
mptcp.h
mptcp: sched: remove mptcp_sched_data
2025-04-15 08:21:46 -07:00
mrp.h
…
ncsi.h
…
ndisc.h
net: replace ND_PRINTK with dynamic debug
2025-07-10 15:27:32 -07:00
neighbour_tables.h
…
neighbour.h
neighbour: Update pneigh_entry in pneigh_create().
2025-07-17 16:25:22 -07:00
net_debug.h
…
net_failover.h
…
net_namespace.h
namespace-6.18-rc1
2025-09-29 11:20:29 -07:00
net_ratelimit.h
…
net_shaper.h
…
net_trackers.h
…
netdev_lock.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-05-22 09:42:41 -07:00
netdev_netlink.h
net: add granular lock for the netdev netlink socket
2025-03-12 13:32:35 -07:00
netdev_queues.h
net: add helper to pre-check if PP for an Rx queue will be unreadable
2025-09-04 10:19:17 +02:00
netdev_rx_queue.h
net: designate XSK pool pointers in queues as "ops protected"
2025-04-09 17:01:51 -07:00
netevent.h
…
netkit.h
…
netlabel.h
…
netlink.h
netlink: introduce type-checking attribute iteration for nlmsg
2025-07-02 15:39:04 -07:00
netmem.h
netmem, mlx4: access ->pp_ref_count through netmem_desc instead of page
2025-07-23 17:46:54 -07:00
netprio_cgroup.h
…
netrom.h
…
nexthop.h
ipv6: Protect nh->f6i_list with spinlock and flag.
2025-04-24 09:29:56 +02:00
nl802154.h
…
nsh.h
…
pfcp.h
net: pfcp: fix typo in message_priority field name
2025-06-13 18:17:08 -07:00
pie.h
…
ping.h
inet: ping: remove ping_hash()
2025-09-01 13:15:14 -07:00
pkt_cls.h
net: sched: fix TCF_LAYER_TRANSPORT handling in tcf_get_base_ptr()
2025-11-24 18:53:14 -08:00
pkt_sched.h
net/sched: sch_qfq: Fix null-deref in agg_dequeue
2025-07-10 11:08:35 +02:00
pptp.h
…
proto_memory.h
net-memcg: Pass struct sock to mem_cgroup_sk_under_memory_pressure().
2025-08-19 19:20:59 -07:00
protocol.h
…
psample.h
…
psnap.h
…
psp.h
psp: base PSP device support
2025-09-18 12:32:06 +02:00
raw.h
net: use NUMA drop counters for softnet_data.dropped
2025-09-14 11:35:17 -07:00
rawv6.h
…
red.h
…
regulatory.h
…
request_sock.h
tcp: reclaim 8 bytes in struct request_sock_queue
2025-09-22 17:55:25 -07:00
rose.h
net: rose: convert 'use' field to refcount_t
2025-08-27 07:43:08 -07:00
route.h
net: use dst_dev_rcu() in sk_setup_caps()
2025-08-29 19:36:32 -07:00
rpl.h
…
rps.h
net: Add rfs_needed() helper
2025-09-03 15:08:20 -07:00
rsi_91x.h
…
rstreason.h
net: Retire DCCP socket.
2025-04-11 18:58:10 -07:00
rtnetlink.h
rtnetlink: Remove "net" from newlink params
2025-02-21 15:28:03 -08:00
rtnh.h
…
sch_generic.h
net/sched: Fix backlog accounting in qdisc_dequeue_internal
2025-08-14 17:52:29 -07:00
scm.h
af_unix/scm: fix whitespace errors
2025-07-04 09:32:35 +02:00
secure_seq.h
net: Retire DCCP socket.
2025-04-11 18:58:10 -07:00
seg6_hmac.h
ipv6: sr: Prepare HMAC key ahead of time
2025-08-26 18:11:29 -07:00
seg6_local.h
…
seg6.h
…
selftests.h
…
slhc_vj.h
…
smc.h
dibs: Move event handling to dibs layer
2025-09-23 11:13:22 +02:00
snmp.h
net: snmp: remove SNMP_MIB_SENTINEL
2025-09-08 18:06:21 -07:00
sock_reuseport.h
…
sock.h
Revert "net: group sk_backlog and sk_receive_queue"
2025-09-29 18:30:32 -07:00
Space.h
…
stp.h
…
strparser.h
strparser: Remove unused __strp_unpause
2025-05-05 16:48:12 -07:00
switchdev.h
…
tc_wrapper.h
…
tcp_ao.h
tcp: Free TCP-AO/TCP-MD5 info/keys without RCU
2025-09-11 19:05:56 -07:00
tcp_ecn.h
tcp: accecn: AccECN option failure handling
2025-09-18 08:47:52 +02:00
tcp_states.h
…
tcp.h
tcp: add newval parameter to tcp_rcvbuf_grow()
2025-10-29 17:30:19 -07:00
tcx.h
bpf: Remove location field in tcx_link
2025-07-11 11:00:57 -07:00
timewait_sock.h
tcp: Remove timewait_sock_ops.twsk_destructor().
2025-08-25 17:53:35 -07:00
tipc.h
…
tls_prot.h
…
tls_toe.h
…
tls.h
net: tls: Cancel RX async resync request on rcd_delta overflow
2025-10-29 18:32:18 -07:00
transp_v6.h
…
tso.h
…
tun_proto.h
…
udp_tunnel.h
udp_tunnel: fix deadlock in udp_tunnel_nic_set_port_priv()
2025-06-24 16:31:36 -07:00
udp.h
udp: remove busylock and add per NUMA queues
2025-09-23 16:38:39 -07:00
udplite.h
…
vsock_addr.h
…
vxlan.h
vxlan: Support MC routing in the underlay
2025-06-17 18:18:46 -07:00
wext.h
…
x25.h
net/x25: Remove unused x25_terminate_link()
2025-07-14 17:19:13 -07:00
x25device.h
…
xdp_priv.h
…
xdp_sock_drv.h
bpf: Allow bpf_xdp_shrink_data to shrink a frag from head and tail
2025-09-23 13:35:12 -07:00
xdp_sock.h
net: xsk: introduce XDP_MAX_TX_SKB_BUDGET setsockopt
2025-07-10 14:48:29 +02:00
xdp.h
bpf-next-for-netdev
2025-09-24 10:22:37 -07:00
xfrm.h
xfrm: Determine inner GSO type from packet inner protocol
2025-10-30 11:52:31 +01:00
xsk_buff_pool.h
xsk: Fix offset calculation in unaligned mode
2025-04-24 17:11:52 -07:00