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Zhiping du 9ed0b1ce1a bpf: Check types of arguments passed into helpers 
[upstream commit a7658e1a4164ce2b9eb4a11aadbba38586e93bd6]

Introduce new helper that reuses existing skb perf_event output
implementation, but can be called from raw_tracepoint programs
that receive 'struct sk_buff *' as tracepoint argument or
can walk other kernel data structures to skb pointer.

In order to do that teach verifier to resolve true C types
of bpf helpers into in-kernel BTF ids.
The type of kernel pointer passed by raw tracepoint into bpf
program will be tracked by the verifier all the way until
it's passed into helper function.
For example:
kfree_skb() kernel function calls trace_kfree_skb(skb, loc);
bpf programs receives that skb pointer and may eventually
pass it into bpf_skb_output() bpf helper which in-kernel is
implemented via bpf_skb_event_output() kernel function.
Its first argument in the kernel is 'struct sk_buff *'.
The verifier makes sure that types match all the way.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20191016032505.2089704-11-ast@kernel.org
 		2022-07-21 11:32:30 +08:00
..
6lowpan Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
9p net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid 2021-03-16 16:39:51 +08:00
802 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
8021q net: vlan: avoid leaks on register_vlan_dev() failures 2021-04-12 12:51:15 +08:00
appletalk appletalk: Fix skb allocation size in loopback case 2021-05-20 16:06:48 +08:00
atm atm: fix a memory leak of vcc->user_back 2021-03-16 16:37:15 +08:00
ax25 AX.25: Prevent integer overflows in connect and sendmsg 2021-03-16 16:32:42 +08:00
batman-adv batman-adv: initialize "struct batadv_tvlv_tt_vlan_data"->reserved field 2021-05-20 16:06:56 +08:00
bluetooth bluetooth: eliminate the potential race condition when removing the HCI controller 2021-05-20 16:07:38 +08:00
bpf Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
bpfilter net/bpfilter: remove superfluous testing message 2021-03-16 16:26:23 +08:00
bridge net: bridge: mcast: fix broken length + header check for MRDv6 Adv. 2021-05-20 16:08:01 +08:00
caif Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
can can: bcm/raw: fix msg_namelen values depending on CAN_REQUIRED_SIZE 2021-05-20 16:07:00 +08:00
ceph libceph: clear con->out_msg on Policy::stateful_server faults 2021-03-16 16:40:11 +08:00
core bpf: Check types of arguments passed into helpers 2022-07-21 11:32:30 +08:00
dcb net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands 2021-04-12 12:51:30 +08:00
dccp ipv6: weaken the v4mapped source check 2021-05-20 16:06:29 +08:00
decnet Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
dns_resolver KEYS: Don't write out to userspace while holding key semaphore 2021-03-16 16:26:42 +08:00
dsa net: dsa: tag_mtk: fix 802.1ad VLAN egress 2021-04-12 12:53:14 +08:00
ethernet Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
hsr hsr: use netdev_err() instead of WARN_ONCE() 2021-05-20 16:07:38 +08:00
ieee802154 net: ieee802154: forbid monitor for add llsec seclevel 2021-05-20 16:07:10 +08:00
ife Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
ipv4 esp: Fix possible buffer overflow in ESP transformation 2022-04-06 16:57:44 +08:00
ipv6 esp: Fix possible buffer overflow in ESP transformation 2022-04-06 16:57:44 +08:00
iucv net/af_iucv: remove WARN_ONCE on malformed RX packets 2021-04-12 12:52:44 +08:00
kcm Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
key af_key: relax availability checks for skb size calculation 2021-04-12 12:51:58 +08:00
l2tp l2tp: remove skb_dst_set() from l2tp_xmit_skb() 2021-03-16 16:31:43 +08:00
l3mdev Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
lapb net: lapb: Copy the skb before sending a packet 2021-04-12 12:51:53 +08:00
llc net: silence data-races on sk_backlog.tail 2021-03-16 16:36:36 +08:00
mac80211 mac80211: bail out if cipher schemes are invalid 2021-05-20 16:07:57 +08:00
mac802154 net: mac802154: Fix general protection fault 2021-05-20 16:07:04 +08:00
mpls net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0 2021-04-12 12:52:56 +08:00
ncsi net/ncsi: Avoid channel_monitor hrtimer deadlock 2021-05-20 16:07:00 +08:00
netfilter netfilter: nf_tables_offload: incorrect flow offload action array size 2022-04-06 16:56:54 +08:00
netlabel cipso,calipso: resolve a number of problems with the DOI refcounts 2021-04-12 12:52:59 +08:00
netlink genetlink: remove genl_bind 2021-03-16 16:31:42 +08:00
netrom net: netrom: Fix potential nr_neigh refcnt leak in nr_add_node 2021-03-16 16:26:51 +08:00
nfc net:nfc:digital: Fix a double free in digital_tg_recv_dep_req 2021-05-20 16:08:01 +08:00
nsh Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
openvswitch openvswitch: fix stack OOB read while fragmenting IPv4 packets 2021-05-20 16:07:33 +08:00
packet af_packet: TPACKET_V3: fix fill status rwlock imbalance 2021-03-16 16:33:48 +08:00
phonet Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
psample Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
qrtr net: qrtr: fix a kernel-infoleak in qrtr_recvmsg() 2021-04-12 12:53:32 +08:00
rds net/rds: Fix a use after free in rds_message_map_pages 2021-05-20 16:07:01 +08:00
rfkill rfkill: Fix use-after-free in rfkill_resume() 2021-03-16 16:41:16 +08:00
rose rose: Fix Null pointer dereference in rose_send_frame() 2021-03-16 16:41:52 +08:00
rxrpc rxrpc: Fix clearance of Tx/Rx ring when releasing a call 2021-04-12 12:52:05 +08:00
sched net: sched: bump refcount for new action in ACT replace mode 2021-05-20 16:07:03 +08:00
sctp sctp: delay auto_asconf init until binding the first addr 2021-05-20 16:08:02 +08:00
smc net/smc: fix direct access to ib_gid_addr->ndev in smc_ib_determine_gid() 2021-03-16 16:41:07 +08:00
strparser Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
sunrpc rpc: fix NULL dereference on kmalloc failure 2021-05-20 16:06:45 +08:00
switchdev net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP 2021-04-12 12:51:48 +08:00
tipc net:tipc: Fix a double free in tipc_sk_mcast_rcv 2021-05-20 16:07:00 +08:00
tls net/tls: Protect from calling tls_dev_del for TLS RX twice 2021-03-16 16:41:52 +08:00
toa net: csig toa patch 2022-04-06 16:55:16 +08:00
unix skbuff: fix a data race in skb_queue_len() 2021-03-16 16:36:50 +08:00
vmw_vsock vsock/vmci: log once the failed queue pair allocation 2021-05-20 16:07:59 +08:00
wimax Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
wireless cfg80211: scan: drop entry from hidden_list on overflow 2021-05-20 16:07:41 +08:00
x25 net/x25: prevent a couple of overflows 2021-03-16 16:41:56 +08:00
xdp xsk: Replace datagram_poll by sock_poll_wait 2021-03-16 16:42:25 +08:00
xfrm net: xfrm: Localize sequence counter per network namespace 2021-05-20 16:06:58 +08:00
Kconfig Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Makefile Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
compat.c net/compat: Add missing sock updates for SCM_RIGHTS 2021-03-16 16:34:05 +08:00
socket.c net: Set fput_needed iff FDPUT_FPUT is set 2021-03-16 16:33:49 +08:00
sysctl_net.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00