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Kai Ma 4fccea5856 netfilter: reject zero shift in nft_bitwise 
commit fe11e5c408 upstream.

Reject zero shift operands for nft_bitwise left and right shift
expressions during initialization.

The carry propagation logic computes the carry from the adjacent 32-bit
word using BITS_PER_TYPE(u32) - shift. A zero shift operand turns this
into a 32-bit shift, which is undefined behaviour.

Reject zero shift operands in the control plane, alongside the existing
check for values greater than or equal to 32, so malformed rules never
reach the packet path.

Fixes: 567d746b55 ("netfilter: bitwise: add support for shifts.")
Cc: stable@kernel.org
Reported-by: Yuan Tan <yuantan098@gmail.com>
Reported-by: Yifan Wu <yifanwucs@gmail.com>
Reported-by: Juefei Pu <tomapufckgml@gmail.com>
Reported-by: Xin Liu <bird@lzu.edu.cn>
Signed-off-by: Kai Ma <k4729.23098@gmail.com>
Signed-off-by: Ren Wei <n05ec@lzu.edu.cn>
Reviewed-by: Fernando Fernandez Mancera <fmancera@suse.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-06-01 17:35:19 +02:00
..
6lowpan 6lowpan: iphc: Fix an off-by-one check of array index 2021-07-22 16:19:03 +02:00
9p net/9p: fix double req put in p9_fd_cancelled 2025-10-19 16:21:28 +02:00
802 net: 802: LLC+SNAP OID:PID lookup on start of skb data 2025-01-23 17:15:49 +01:00
8021q net: vlan: sync VLAN features with lower device 2025-12-07 06:09:26 +09:00
appletalk net: appletalk: Fix use-after-free in AARP proxy probe 2025-08-28 16:24:04 +02:00
atm atm: lec: fix use-after-free in sock_def_readable() 2026-04-18 10:33:29 +02:00
ax25 ax25: properly unshare skbs in ax25_kiss_rcv() 2025-09-09 18:50:20 +02:00
batman-adv batman-adv: hold claim backbone gateways by reference 2026-06-01 17:35:04 +02:00
bluetooth Bluetooth: af_bluetooth: Fix deadlock 2026-06-01 17:35:10 +02:00
bpf bpf: Do not let BPF test infra emit invalid GSO types to stack 2026-02-06 16:41:58 +01:00
bpfilter bpfilter: Specify the log level for the kmsg message 2021-06-25 13:13:50 +02:00
bridge bridge: br_nd_send: validate ND option lengths 2026-04-18 10:33:33 +02:00
caif net: caif: clear client service pointer on teardown 2026-06-01 17:35:14 +02:00
can can: raw: fix ro->uniq use-after-free in raw_rcv() 2026-06-01 17:35:04 +02:00
ceph libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply() 2026-06-01 17:35:16 +02:00
core net: clear the dst when changing skb protocol 2026-06-01 17:35:11 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-11 15:13:53 +02:00
dccp net: fix data-races around sk->sk_forward_alloc 2025-01-23 17:16:04 +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: free routing table on probe failure 2026-02-19 16:21:45 +01:00
ethernet gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers 2024-09-12 11:07:47 +02:00
ethtool ethtool: add support to set/get tx copybreak buf size via ethtool 2026-03-04 07:19:36 -05:00
hsr net: hsr: fix VLAN add unwind on slave errors 2026-04-18 10:33:31 +02:00
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: call sk_data_ready() after listener migration 2026-06-01 17:35:17 +02:00
ipv6 net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels 2026-06-01 17:35:19 +02:00
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 af_key: validate families in pfkey_send_migrate() 2026-04-18 10:33:24 +02:00
l2tp l2tp: Drop large packets with UDP encap 2026-06-01 17:35:03 +02:00
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: fix data loss when reading from a socket in llc_ui_recvmsg() 2025-06-04 14:38:06 +02:00
mac80211 wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure 2026-06-01 17:35:07 +02:00
mac802154 mac802154: check local interfaces before deleting sdata list 2025-01-23 17:16:00 +01:00
mctp net: mctp: Don't access ifa_index when missing 2026-04-18 10:33:35 +02:00
mpls mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). 2025-06-27 11:05:36 +01:00
mptcp MPTCP: fix lock class name family in pm_nl_create_listen_socket 2026-06-01 17:35:08 +02:00
ncsi net: ncsi: fix skb leak in error paths 2026-04-18 10:33:15 +02:00
netfilter netfilter: reject zero shift in nft_bitwise 2026-06-01 17:35:19 +02:00
netlabel calipso: unlock rcu before returning -EAFNOSUPPORT 2025-06-27 11:05:22 +01:00
netlink netlink: avoid infinite retry looping in netlink_unicast() 2025-08-28 16:24:15 +02:00
netrom netrom: fix double-free in nr_route_frame() 2026-02-06 16:41:58 +01:00
nfc NFC: digital: Bounds check NFC-A cascade depth in SDD response handler 2026-06-01 17:35:04 +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: validate MPLS set/set_masked payload length 2026-04-18 10:33:24 +02:00
packet net: fix fanout UAF in packet_release() via NETDEV_UP race 2026-04-18 10:33:25 +02:00
phonet phonet/pep: Move call to pn_skb_get_dst_sockaddr() earlier in pep_sock_accept() 2025-08-28 16:23:59 +02:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:36:37 +01:00
qrtr net: qrtr: ns: Fix use-after-free in driver remove() 2026-06-01 17:35:14 +02:00
rds net: rds: fix MR cleanup on copy error 2026-06-01 17:35:15 +02:00
rfkill net: rfkill: prevent unlimited numbers of rfkill events from being created 2026-04-18 10:33:38 +02:00
rose net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect 2026-04-18 10:33:20 +02:00
rxrpc rxrpc: Fix missing validation of ticket length in non-XDR key preparsing 2026-06-01 17:35:12 +02:00
sched net/sched: cls_u32: use skb_header_pointer_careful() 2026-06-01 17:35:09 +02:00
sctp sctp: move SCTP_CMD_ASSOC_SHKEY right after SCTP_CMD_PEER_INIT 2026-02-06 16:41:52 +01:00
smc net/smc: avoid early lgr access in smc_clc_wait_msg 2026-06-01 17:35:15 +02:00
strparser net: strparser: fix skb_head leak in strp_abort_strp() 2026-06-01 17:35:14 +02:00
sunrpc SUNRPC: lock against ->sock changing during sysfs read 2026-06-01 17:35:11 +02:00
switchdev net: make switchdev_bridge_port_{,unoffload} loosely coupled with the bridge 2021-08-04 12:35:07 +01:00
tipc tipc: fix bc_ackers underflow on duplicate GRP_ACK_MSG 2026-04-18 10:33:36 +02:00
tls net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption 2026-04-18 10:33:37 +02:00
unix af_unix: read UNIX_DIAG_VFS data under unix_state_lock 2026-06-01 17:35:03 +02:00
vmw_vsock vmw_vsock: bypass false-positive Wnonnull warning with gcc-16 2026-03-04 07:20:11 -05:00
wireless Revert "wifi: cfg80211: stop NAN and P2P in cfg80211_leave" 2026-06-01 17:35:12 +02:00
x25 net/x25: Fix overflow when accumulating packets 2026-04-18 10:33:31 +02:00
xdp xsk: tighten UMEM headroom validation to account for tailroom and min frame 2026-06-01 17:35:02 +02:00
xfrm xfrm: clear trailing padding in build_polexpire() 2026-06-01 17:35:07 +02:00
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: Remove RTNL dance for SIOCBRADDIF and SIOCBRDELIF. 2026-01-19 13:10:11 +01:00
sysctl_net.c net: Ensure net namespace isolation of sysctls 2021-04-12 13:27:11 -07:00