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linux/net
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Cong Wang e2373eea34 bpf: Check negative offsets in __bpf_skb_min_len() 
[ Upstream commit 9ecc4d858b ]

skb_network_offset() and skb_transport_offset() can be negative when
they are called after we pull the transport header, for example, when
we use eBPF sockmap at the point of ->sk_data_ready().

__bpf_skb_min_len() uses an unsigned int to get these offsets, this
leads to a very large number which then causes bpf_skb_change_tail()
failed unexpectedly.

Fix this by using a signed int to get these offsets and ensure the
minimum is at least zero.

Fixes: 5293efe62d ("bpf: add bpf_skb_change_tail helper")
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20241213034057.246437-2-xiyou.wangcong@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-01-09 13:28:37 +01:00
..
6lowpan 6lowpan: iphc: Fix an off-by-one check of array index 2021-07-22 16:19:03 +02:00
9p 9p/xen: fix release of IRQ 2024-12-14 19:51:21 +01:00
802 mrp: introduce active flags to prevent UAF when applicant uninit 2022-12-31 13:14:42 +01:00
8021q gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers 2024-09-12 11:07:47 +02:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-20 15:17:37 +01:00
atm atm: Fix Use-After-Free in do_vcc_ioctl 2023-12-20 15:17:35 +01:00
ax25 net: ax25: Fix deadlock caused by skb_recv_datagram in ax25_recvmsg 2022-06-22 14:22:01 +02:00
batman-adv batman-adv: Do not let TT changes list grows indefinitely 2024-12-19 18:07:19 +01:00
bluetooth Bluetooth: hci_core: Fix calling mgmt_device_connected 2024-12-14 19:51:47 +01:00
bpf bpf: Set run context for rawtp test_run callback 2024-07-05 09:14:06 +02:00
bpfilter bpfilter: Specify the log level for the kmsg message 2021-06-25 13:13:50 +02:00
bridge net: bridge: xmit: make sure we have at least eth header len bytes 2024-11-14 13:13:40 +01:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-17 08:48:54 +01:00
can net: af_can: do not leave a dangling sk pointer in can_create() 2024-12-14 19:51:37 +01:00
ceph libceph: fix race between delayed_work() and ceph_monc_stop() 2024-07-18 13:07:42 +02:00
core bpf: Check negative offsets in __bpf_skb_min_len() 2025-01-09 13:28:37 +01:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-11 15:13:53 +02:00
dccp dccp: Fix memory leak in dccp_feat_change_recv 2024-12-14 19:51:27 +01:00
dns_resolver keys, dns: Fix size check of V1 server-list header 2024-01-25 14:52:46 -08:00
dsa net: dsa: tag_sja1105: always prefer source port information from INCL_SRCPT 2024-06-16 13:39:54 +02:00
ethernet gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers 2024-09-12 11:07:47 +02:00
ethtool ethtool: Fix wrong mod state in case of verbose and no_mask bitset 2024-12-14 19:51:28 +01:00
hsr net: hsr: avoid potential out-of-bound access in fill_frame_info() 2024-12-14 19:51:27 +01:00
ieee802154 net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() 2024-12-14 19:51:37 +01:00
ife net: sched: ife: fix potential use-after-free 2024-01-05 15:13:29 +01:00
ipv4 tcp_bpf: Add sk_rmem_alloc related logic for tcp_bpf ingress redirection 2025-01-09 13:28:37 +01:00
ipv6 net: inet6: do not leave a dangling sk pointer in inet6_create() 2024-12-14 19:51:37 +01:00
iucv s390/iucv: fix receive buffer virtual vs physical address confusion 2024-09-04 13:23:27 +02:00
kcm kcm: Serialise kcm_sendmsg() for the same socket. 2024-09-04 13:23:32 +02:00
key net: af_key: fix sadb_x_filter validation 2023-08-26 14:23:32 +02:00
l2tp genetlink: hold RCU in genlmsg_mcast() 2024-11-01 01:52:34 +01:00
l3mdev net: Add l3mdev index to flow struct and avoid oif reset for port devices 2024-10-17 15:11:57 +02:00
lapb net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc llc: call sock_orphan() at release time 2024-02-23 08:54:54 +01:00
mac80211 mac80211: fix user-power when emulating chanctx 2024-12-14 19:50:39 +01:00
mac802154 net: mac802154: Fix racy device stats updates by DEV_STATS_INC() and DEV_STATS_ADD() 2024-07-27 10:46:13 +02:00
mctp mctp: Handle error of rtnl_register_module(). 2024-10-17 15:11:57 +02:00
mpls net: mpls: fix stale pointer if allocation fails during device rename 2023-02-22 12:57:09 +01:00
mptcp mptcp: cope racing subflow creation in mptcp_rcv_space_adjust 2024-12-14 19:50:38 +01:00
ncsi net/ncsi: Fix the multi thread manner of NCSI driver 2024-07-05 09:14:06 +02:00
netfilter netfilter: ipset: Fix for recursive locking warning 2025-01-09 13:28:32 +01:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2024-01-25 14:52:33 -08:00
netlink netlink: terminate outstanding dump on socket close 2024-12-14 19:50:34 +01:00
netrom netrom: Fix a memory leak in nr_heartbeat_expiry() 2024-07-05 09:14:29 +02:00
nfc nfc: nci: Fix handling of zero-length payload packets in nci_rx_work() 2024-06-16 13:39:48 +02:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-05-17 11:50:48 +02:00
openvswitch openvswitch: Set the skbuff pkt_type for proper pmtud support. 2024-06-16 13:39:47 +02:00
packet af_packet: avoid erroring out after sock_init_data() in packet_create() 2024-12-14 19:51:37 +01:00
phonet phonet: fix rtm_phonet_notify() skb allocation 2024-05-17 11:50:58 +02:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:36:37 +01:00
qrtr net: qrtr: Update packets cloning when broadcasting 2024-10-17 15:11:08 +02:00
rds net:rds: Fix possible deadlock in rds_message_put 2024-09-04 13:23:39 +02:00
rfkill net: rfkill: gpio: Add check for clk_enable() 2024-12-14 19:50:58 +01:00
rose net/rose: fix races in rose_kill_by_device() 2024-01-05 15:13:29 +01:00
rxrpc rxrpc: Fix response to PING RESPONSE ACKs to a dead call 2024-02-23 08:54:58 +01:00
sched net: sched: fix ordering of qlen adjustment 2025-01-09 13:28:29 +01:00
sctp sctp: properly validate chunk size in sctp_sf_ootb() 2024-11-14 13:13:36 +01:00
smc net/smc: check return value of sock_recvmsg when draining clc data 2025-01-09 13:28:31 +01:00
strparser bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding 2021-11-18 19:17:11 +01:00
sunrpc sunrpc: clear XPRT_SOCK_UPD_TIMEOUT when reset transport 2024-12-14 19:51:21 +01:00
switchdev net: make switchdev_bridge_port_{,unoffload} loosely coupled with the bridge 2021-08-04 12:35:07 +01:00
tipc tipc: fix NULL deref in cleanup_bearer() 2024-12-19 18:07:19 +01:00
tls tls: fix race between tx work scheduling and socket close 2024-08-19 05:45:49 +02:00
unix af_unix: Remove put_pid()/put_cred() in copy_peercred(). 2024-09-12 11:07:45 +02:00
vmw_vsock virtio/vsock: Fix accept_queue memory leak 2024-12-19 18:07:18 +01:00
wireless genetlink: hold RCU in genlmsg_mcast() 2024-11-01 01:52:34 +01:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:21:23 -04:00
xdp xsk: fix OOB map writes when deleting elements 2024-12-14 19:51:33 +01:00
xfrm xfrm: store and rely on direction to construct offload flags 2024-12-14 19:50:54 +01:00
compat.c net: Return the correct errno code 2021-06-03 15:13:56 -07:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig Remove DECnet support from kernel 2023-06-21 15:59:15 +02:00
Makefile Remove DECnet support from kernel 2023-06-21 15:59:15 +02:00
socket.c net: explicitly clear the sk pointer, when pf->create fails 2024-10-17 15:12:00 +02:00
sysctl_net.c net: Ensure net namespace isolation of sysctls 2021-04-12 13:27:11 -07:00