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8b6861390ffee6b8ed78b9395e3776c16fec6579
linux/net/netfilter
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Nicolas Bouchinet 8b6861390f netfilter: conntrack: Bound nf_conntrack sysctl writes 
nf_conntrack_max and nf_conntrack_expect_max sysctls were authorized to
be written any negative value, which would then be stored in the
unsigned int variables nf_conntrack_max and nf_ct_expect_max variables.

While the do_proc_dointvec_conv function is supposed to limit writing
handled by proc_dointvec proc_handler to INT_MAX. Such a negative value
being written in an unsigned int leads to a very high value, exceeding
this limit.

Moreover, the nf_conntrack_expect_max sysctl documentation specifies the
minimum value is 1.

The proc_handlers have thus been updated to proc_dointvec_minmax in
order to specify the following write bounds :

* Bound nf_conntrack_max sysctl writings between SYSCTL_ZERO
  and SYSCTL_INT_MAX.

* Bound nf_conntrack_expect_max sysctl writings between SYSCTL_ONE
  and SYSCTL_INT_MAX as defined in the sysctl documentation.

With this patch applied, sysctl writes outside the defined in the bound
will thus lead to a write error :

```
sysctl -w net.netfilter.nf_conntrack_expect_max=-1
sysctl: setting key "net.netfilter.nf_conntrack_expect_max": Invalid argument
```

Signed-off-by: Nicolas Bouchinet <nicolas.bouchinet@ssi.gouv.fr>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2025-03-12 21:01:56 +01:00
..
ipset
netfilter: ipset: Fix for recursive locking warning
2024-12-19 00:28:47 +01:00
ipvs
ipvs: speed up reads from ip_vs_conn proc file
2025-01-05 18:41:31 +01:00
core.c
net/netfilter: make use of the helper macro LIST_HEAD()
2024-09-06 18:10:21 -07:00
Kconfig
netfilter: xtables: allow xtables-nft only builds
2024-01-29 15:43:21 +01:00
Makefile
netfilter: Add bpf_xdp_flow_lookup kfunc
2024-07-01 17:03:01 +02:00
nf_bpf_link.c
netfilter: bpf: Pass string literal as format argument of request_module()
2024-11-14 12:39:50 +01:00
nf_conncount.c
netfilter: move nf_ct_netns_get out of nf_conncount_init
2024-08-19 18:44:51 +02:00
nf_conntrack_acct.c
…
nf_conntrack_amanda.c
netfilter: conntrack: remove skb argument from nf_ct_refresh
2025-01-19 16:41:55 +01:00
nf_conntrack_bpf.c
net: netfilter: Make ct zone opts configurable for bpf ct helpers
2024-05-22 15:00:56 -07:00
nf_conntrack_broadcast.c
netfilter: conntrack: remove skb argument from nf_ct_refresh
2025-01-19 16:41:55 +01:00
nf_conntrack_core.c
netfilter: conntrack: rework offload nf_conn timeout extension logic
2025-01-19 16:41:55 +01:00
nf_conntrack_ecache.c
netfilter: conntrack: add conntrack event timestamp
2025-01-09 14:42:16 +01:00
nf_conntrack_expect.c
netfilter: expect: Simplify the allocation of slab caches in nf_conntrack_expect_init
2024-02-21 11:57:11 +01:00
nf_conntrack_extend.c
netfilter: conntrack: fix extension size table
2023-09-13 21:57:50 +02:00
nf_conntrack_ftp.c
netfilter: nf_ct_ftp: fix deadlock when nat rewrite is needed
2022-09-20 23:50:03 +02:00
nf_conntrack_h323_asn1.c
netfilter: nf_conntrack_h323: Add protection for bmp length out of range
2024-03-07 03:10:35 +01:00
nf_conntrack_h323_main.c
netfilter: conntrack: remove skb argument from nf_ct_refresh
2025-01-19 16:41:55 +01:00
nf_conntrack_h323_types.c
…
nf_conntrack_helper.c
netfilter: conntrack: simplify nf_conntrack_alter_reply
2023-10-10 16:34:28 +02:00
nf_conntrack_irc.c
netfilter: nf_conntrack_irc: Tighten matching on DCC message
2022-09-07 15:55:23 +02:00
nf_conntrack_labels.c
netfilter: conntrack: switch connlabels to atomic_t
2023-10-24 13:16:30 +02:00
nf_conntrack_netbios_ns.c
…
nf_conntrack_netlink.c
Merge tag 'net-next-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2025-01-22 08:28:57 -08:00
nf_conntrack_ovs.c
netfilter: use nf_ip6_check_hbh_len in nf_ct_skb_network_trim
2023-03-08 14:25:41 +01:00
nf_conntrack_pptp.c
netfilter: nf_conntrack: add missing __rcu annotations
2022-07-11 16:25:15 +02:00
nf_conntrack_proto_dccp.c
netfilter: conntrack: dccp: try not to drop skb in conntrack
2024-05-06 11:13:56 +02:00
nf_conntrack_proto_generic.c
…
nf_conntrack_proto_gre.c
netfilter: conntrack: gre: don't set assured flag for clash entries
2023-07-05 14:42:15 +02:00
nf_conntrack_proto_icmp.c
…
nf_conntrack_proto_icmpv6.c
netfilter: conntrack: fix ct-state for ICMPv6 Multicast Router Discovery
2024-05-06 11:13:56 +02:00
nf_conntrack_proto_sctp.c
netfilter: conntrack: cleanup timeout definitions
2025-01-12 20:21:01 -08:00
nf_conntrack_proto_tcp.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
nf_conntrack_proto_udp.c
netfilter: conntrack: udp: fix seen-reply test
2023-02-01 12:18:51 +01:00
nf_conntrack_proto.c
netfilter: add missing module descriptions
2023-11-08 13:52:32 +01:00
nf_conntrack_sane.c
netfilter: nf_ct_sane: remove pseudo skb linearization
2022-08-11 16:50:25 +02:00
nf_conntrack_seqadj.c
…
nf_conntrack_sip.c
netfilter: conntrack: remove skb argument from nf_ct_refresh
2025-01-19 16:41:55 +01:00
nf_conntrack_snmp.c
…
nf_conntrack_standalone.c
netfilter: conntrack: Bound nf_conntrack sysctl writes
2025-03-12 21:01:56 +01:00
nf_conntrack_tftp.c
…
nf_conntrack_timeout.c
netfilter: nf_conntrack: use rcu accessors where needed
2022-07-11 16:25:15 +02:00
nf_conntrack_timestamp.c
…
nf_dup_netdev.c
netfilter: nf_dup_netdev: add and use recursion counter
2022-06-21 10:50:41 +02:00
nf_flow_table_bpf.c
netfilter: Add bpf_xdp_flow_lookup kfunc
2024-07-01 17:03:01 +02:00
nf_flow_table_core.c
netfilter: flowtable: add CLOSING state
2025-01-19 16:41:56 +01:00
nf_flow_table_inet.c
net: netfilter: move nf flowtable bpf initialization in nf_flow_table_module_init()
2024-09-12 15:41:03 +02:00
nf_flow_table_ip.c
Revert "netfilter: flowtable: teardown flow if cached mtu is stale"
2025-02-12 10:35:20 +01:00
nf_flow_table_offload.c
net: hold netdev instance lock during nft ndo_setup_tc
2025-03-06 12:59:43 -08:00
nf_flow_table_procfs.c
netfilter: nf_flow_table: count pending offload workqueue tasks
2022-07-11 16:25:14 +02:00
nf_flow_table_xdp.c
netfilter: nf_tables: Add flowtable map for xdp offload
2024-07-01 17:01:53 +02:00
nf_hooks_lwtunnel.c
sysctl: treewide: constify the ctl_table argument of proc_handlers
2024-07-24 20:59:29 +02:00
nf_internals.h
netfilter: move the sysctl nf_hooks_lwtunnel into the netfilter core
2024-06-19 18:41:59 +02:00
nf_log_syslog.c
netfilter: propagate net to nf_bridge_get_physindev
2024-01-17 12:02:48 +01:00
nf_log.c
sysctl: treewide: constify the ctl_table argument of proc_handlers
2024-07-24 20:59:29 +02:00
nf_nat_amanda.c
netfilter: nat: move repetitive nat port reserve loop to a helper
2022-09-07 16:46:04 +02:00
nf_nat_bpf.c
bpf: treewide: Annotate BPF kfuncs in BTF
2024-01-31 20:40:56 -08:00
nf_nat_core.c
net: convert to nla_get_*_default()
2024-11-11 10:32:06 -08:00
nf_nat_ftp.c
netfilter: nat: move repetitive nat port reserve loop to a helper
2022-09-07 16:46:04 +02:00
nf_nat_helper.c
treewide: use get_random_u32_below() instead of deprecated function
2022-11-18 02:15:15 +01:00
nf_nat_irc.c
netfilter: nat: move repetitive nat port reserve loop to a helper
2022-09-07 16:46:04 +02:00
nf_nat_masquerade.c
netfilter: conntrack: add nf_ct_iter_data object for nf_ct_iterate_cleanup*()
2022-05-13 18:56:27 +02:00
nf_nat_ovs.c
netfilter: nf_nat: fix action not being set for all ct states
2024-01-03 11:17:17 +01:00
nf_nat_proto.c
Merge tag 'ipsec-next-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2023-10-30 14:36:57 -07:00
nf_nat_redirect.c
netfilter: nat: fix ipv6 nat redirect with mapped and scoped addresses
2023-11-08 16:40:30 +01:00
nf_nat_sip.c
netfilter: nat: move repetitive nat port reserve loop to a helper
2022-09-07 16:46:04 +02:00
nf_nat_tftp.c
…
nf_queue.c
netfilter: move nf_reinject into nfnetlink_queue modules
2024-02-21 12:03:22 +01:00
nf_sockopt.c
…
nf_synproxy_core.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
nf_tables_api.c
Merge tag 'nf-25-01-30' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
2025-01-30 09:01:00 -08:00
nf_tables_core.c
netfilter: nf_tables: don't initialize registers in nft_do_chain()
2024-08-20 12:37:25 +02:00
nf_tables_offload.c
net: hold netdev instance lock during nft ndo_setup_tc
2025-03-06 12:59:43 -08:00
nf_tables_trace.c
net: add and use skb_get_hash_net
2024-06-12 14:33:38 -07:00
nfnetlink_acct.c
…
nfnetlink_cthelper.c
netfilter: nf_conntrack: use rcu accessors where needed
2022-07-11 16:25:15 +02:00
nfnetlink_cttimeout.c
netfilter: cttimeout: remove 'l3num' attr check
2024-06-26 00:54:53 +02:00
nfnetlink_hook.c
netfilter: nfnetlink hook: dump bpf prog id
2023-04-21 11:34:14 -07:00
nfnetlink_log.c
netfilter: nfnetlink_log: use proper helper for fetching physinif
2024-01-17 12:02:47 +01:00
nfnetlink_osf.c
netfilter: add missing module descriptions
2023-11-08 13:52:32 +01:00
nfnetlink_queue.c
net: corrections for security_secid_to_secctx returns
2025-01-04 22:11:22 -05:00
nfnetlink.c
netfilter: nfnetlink: Report extack policy errors for batched ops
2024-11-14 12:39:40 +01:00
nft_bitwise.c
netfilter: bitwise: add support for doing AND, OR and XOR directly
2024-11-15 12:07:04 +01:00
nft_byteorder.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
nft_chain_filter.c
netfilter: nf_tables: Simplify chain netdev notifier
2025-01-19 16:41:54 +01:00
nft_chain_nat.c
netfilter: add missing module descriptions
2023-11-08 13:52:32 +01:00
nft_chain_route.c
…
nft_cmp.c
netfilter: nf_tables: pass context structure to nft_parse_register_load
2024-08-20 12:37:24 +02:00
nft_compat.c
netfilter: nf_tables: missing objects with no memcg accounting
2024-09-26 13:03:02 +02:00
nft_connlimit.c
netfilter: nf_tables: allow clone callbacks to sleep
2024-05-10 11:13:45 +02:00
nft_counter.c
netfilter: nft_counter: Use u64_stats_t for statistic.
2024-09-03 10:47:16 +02:00
nft_ct_fast.c
netfilter: nf_tables: fix ct untracked match breakage
2023-05-03 13:49:08 +02:00
nft_ct.c
netfilter: conntrack: remove skb argument from nf_ct_refresh
2025-01-19 16:41:55 +01:00
nft_dup_netdev.c
netfilter: nf_tables: pass context structure to nft_parse_register_load
2024-08-20 12:37:24 +02:00
nft_dynset.c
netfilter: nf_tables: set element timeout update support
2024-09-03 18:19:44 +02:00
nft_exthdr.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
nft_fib_inet.c
netfilter: nft_fib: add reduce support
2022-03-20 00:29:47 +01:00
nft_fib_netdev.c
netfilter: nft_fib: add reduce support
2022-03-20 00:29:47 +01:00
nft_fib.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_flow_offload.c
netfilter: nft_flow_offload: update tcp state flags under lock
2025-01-19 16:41:54 +01:00
nft_fwd_netdev.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_hash.c
netfilter: nf_tables: pass context structure to nft_parse_register_load
2024-08-20 12:37:24 +02:00
nft_immediate.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_inner.c
netfilter: nft_inner: incorrect percpu area handling under softirq
2024-12-03 22:10:58 +01:00
nft_last.c
netfilter: nf_tables: allow clone callbacks to sleep
2024-05-10 11:13:45 +02:00
nft_limit.c
netfilter: nf_tables: allow clone callbacks to sleep
2024-05-10 11:13:45 +02:00
nft_log.c
netfilter: nf_tables: missing objects with no memcg accounting
2024-09-26 13:03:02 +02:00
nft_lookup.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_masq.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_meta.c
netfilter: nf_tables: missing objects with no memcg accounting
2024-09-26 13:03:02 +02:00
nft_nat.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_numgen.c
netfilter: nf_tables: missing objects with no memcg accounting
2024-09-26 13:03:02 +02:00
nft_objref.c
netfilter: nf_tables: pass context structure to nft_parse_register_load
2024-08-20 12:37:24 +02:00
nft_osf.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_payload.c
netfilter: nft_payload: sanitize offset and length before calling skb_checksum()
2024-10-31 10:54:49 +01:00
nft_queue.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_quota.c
netfilter: nf_tables: allow clone callbacks to sleep
2024-05-10 11:13:45 +02:00
nft_range.c
netfilter: nf_tables: pass context structure to nft_parse_register_load
2024-08-20 12:37:24 +02:00
nft_redir.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_reject_inet.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_reject_netdev.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_reject.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_rt.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_set_bitmap.c
netfilter: nf_tables: avoid false-positive lockdep splats in set walker
2024-11-05 22:06:22 +01:00
nft_set_hash.c
netfilter: nft_set_hash: skip duplicated elements pending gc run
2024-12-04 21:37:41 +01:00
nft_set_pipapo_avx2.c
netfilter: nft_set_pipapo_avx2: disable softinterrupts
2024-07-24 10:01:59 +02:00
nft_set_pipapo_avx2.h
…
nft_set_pipapo.c
netfilter: nf_tables: missing objects with no memcg accounting
2024-09-26 13:03:02 +02:00
nft_set_pipapo.h
netfilter: nf_set_pipapo: fix initial map fill
2024-07-17 19:00:47 +02:00
nft_set_rbtree.c
netfilter: nf_tables: fix set size with rbtree backend
2025-01-19 16:41:41 +01:00
nft_socket.c
netfilter: nft_socket: remove WARN_ON_ONCE on maximum cgroup level
2024-11-28 13:14:24 +01:00
nft_synproxy.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_tproxy.c
netfilter: nf_tables: drop unused 3rd argument from validate callback ops
2024-09-03 10:47:17 +02:00
nft_tunnel.c
net: convert to nla_get_*_default()
2024-11-11 10:32:06 -08:00
nft_xfrm.c
xfrm: add generic iptfs defines and functionality
2024-12-05 10:01:28 +01:00
utils.c
netfilter: move nf_reinject into nfnetlink_queue modules
2024-02-21 12:03:22 +01:00
x_tables.c
netfilter: Fix use-after-free in get_info()
2024-10-30 13:17:36 +01:00
xt_addrtype.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_AUDIT.c
…
xt_bpf.c
…
xt_cgroup.c
…
xt_CHECKSUM.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_CLASSIFY.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_cluster.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_comment.c
…
xt_connbytes.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_connlabel.c
…
xt_connlimit.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_connmark.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_CONNSECMARK.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_conntrack.c
…
xt_cpu.c
…
xt_CT.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_dccp.c
…
xt_devgroup.c
…
xt_dscp.c
…
xt_DSCP.c
netfilter: x_tables: use correct integer types
2022-07-11 16:40:45 +02:00
xt_ecn.c
…
xt_esp.c
…
xt_hashlimit.c
netfilter: xt_hashlimit: replace vmalloc calls with kvmalloc
2025-03-12 16:37:48 +01:00
xt_helper.c
…
xt_hl.c
…
xt_HL.c
…
xt_HMARK.c
…
xt_IDLETIMER.c
netfilter: IDLETIMER: Fix for possible ABBA deadlock
2024-12-11 23:15:19 +01:00
xt_ipcomp.c
…
xt_iprange.c
…
xt_ipvs.c
…
xt_l2tp.c
…
xt_LED.c
netfilter: x_tables: fix LED ID check in led_tg_check()
2024-11-28 13:14:24 +01:00
xt_length.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
2023-02-22 21:25:23 -08:00
xt_limit.c
…
xt_LOG.c
…
xt_mac.c
…
xt_mark.c
netfilter: xtables: fix typo causing some targets not to load on IPv6
2024-10-21 11:31:26 +02:00
xt_MASQUERADE.c
…
xt_multiport.c
…
xt_nat.c
…
xt_NETMAP.c
…
xt_nfacct.c
…
xt_NFLOG.c
netfilter: xtables: fix typo causing some targets not to load on IPv6
2024-10-21 11:31:26 +02:00
xt_NFQUEUE.c
…
xt_osf.c
netfilter: nfnetlink_osf: fix module autoload
2023-06-20 22:43:42 +02:00
xt_owner.c
netfilter: xt_owner: Fix for unsafe access of sk->sk_socket
2023-12-06 17:52:15 +01:00
xt_physdev.c
netfilter: propagate net to nf_bridge_get_physindev
2024-01-17 12:02:48 +01:00
xt_pkttype.c
…
xt_policy.c
…
xt_quota.c
…
xt_rateest.c
…
xt_RATEEST.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_realm.c
…
xt_recent.c
netfilter: xt_recent: Lift restrictions on max hitcount value
2024-06-28 17:57:50 +02:00
xt_REDIRECT.c
netfilter: nft_redir: use struct nf_nat_range2 throughout and deduplicate eval call-backs
2023-03-22 21:48:59 +01:00
xt_repldata.h
netfilter: xtables: refactor deprecated strncpy
2023-08-22 15:13:21 +02:00
xt_sctp.c
netfilter: xt_sctp: validate the flag_info count
2023-08-30 17:34:01 +02:00
xt_SECMARK.c
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
2024-10-09 23:20:46 +02:00
xt_set.c
…
xt_socket.c
net: annotate data-races around sk->sk_mark
2023-07-29 18:13:41 +01:00
xt_state.c
…
xt_statistic.c
treewide: use get_random_u32() when possible
2022-10-11 17:42:58 -06:00
xt_string.c
…
xt_tcpmss.c
…
xt_TCPMSS.c
netfilter: x_tables: use correct integer types
2022-07-11 16:40:45 +02:00
xt_TCPOPTSTRIP.c
…
xt_tcpudp.c
xtables: move icmp/icmpv6 logic to xt_tcpudp
2023-03-22 21:48:59 +01:00
xt_TEE.c
…
xt_time.c
…
xt_TPROXY.c
netfilter: xt_TPROXY: remove pr_debug invocations
2022-07-21 00:56:00 +02:00
xt_TRACE.c
netfilter: xtables: fix typo causing some targets not to load on IPv6
2024-10-21 11:31:26 +02:00
xt_u32.c
netfilter: xt_u32: validate user space input
2023-08-30 17:34:01 +02:00