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linux/net/netfilter
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Nikolay Borisov 00db674bed netfilter: ipset: Fix sleeping memory allocation in atomic context 
Commit 00590fdd5b introduced RCU locking in list type and in
doing so introduced a memory allocation in list_set_add, which
is done in an atomic context, due to the fact that ipset rcu
list modifications are serialised with a spin lock. The reason
why we can't use a mutex is that in addition to modifying the
list with ipset commands, it's also being modified when a
particular ipset rule timeout expires aka garbage collection.
This gc is triggered from set_cleanup_entries, which in turn
is invoked from a timer thus requiring the lock to be bh-safe.

Concretely the following call chain can lead to "sleeping function
called in atomic context" splat:
call_ad -> list_set_uadt -> list_set_uadd -> kzalloc(, GFP_KERNEL).
And since GFP_KERNEL allows initiating direct reclaim thus
potentially sleeping in the allocation path.

To fix the issue change the allocation type to GFP_ATOMIC, to
correctly reflect that it is occuring in an atomic context.

Fixes: 00590fdd5b ("netfilter: ipset: Introduce RCU locking in list type")
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-10-17 13:01:24 +02:00
..
ipset netfilter: ipset: Fix sleeping memory allocation in atomic context 2015-10-17 13:01:24 +02:00
ipvs ipvs: add more mcast parameters for the sync daemon 2015-08-21 09:10:11 -07:00
core.c netfilter: sync with packet rx also after removing queue entries 2015-10-13 13:59:56 +02:00
Kconfig netfilter: factor out packet duplication for IPv4/IPv6 2015-08-07 11:49:49 +02:00
Makefile netfilter: nf_tables: add netdev table to filter from ingress 2015-05-26 18:41:23 +02:00
nf_conntrack_acct.c netfilter: Remove uses of seq_<foo> return values 2015-03-18 10:51:35 +01:00
nf_conntrack_amanda.c net: Remove state argument from skb_find_text() 2015-02-22 15:59:54 -05:00
nf_conntrack_broadcast.c
nf_conntrack_core.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2015-09-05 21:57:42 -07:00
nf_conntrack_ecache.c netfilter: conntrack: remove timer from ecache extension 2014-06-25 19:15:38 +02:00
nf_conntrack_expect.c netfilter: nf_conntrack: add direction support for zones 2015-08-18 01:22:50 +02:00
nf_conntrack_extend.c
nf_conntrack_ftp.c netfilter: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +02:00
nf_conntrack_h323_asn1.c
nf_conntrack_h323_main.c ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCAST 2015-05-25 13:25:33 -04:00
nf_conntrack_h323_types.c
nf_conntrack_helper.c netfilter: fix spelling errors 2014-10-30 17:35:30 +01:00
nf_conntrack_irc.c
nf_conntrack_l3proto_generic.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_labels.c netfilter: connlabels: Export setting connlabel length 2015-08-27 11:40:43 -07:00
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c netfilter: nf_conntrack: add efficient mark to zone mapping 2015-08-18 01:24:05 +02:00
nf_conntrack_pptp.c netfilter: nf_conntrack: push zone object into functions 2015-08-11 12:29:01 +02:00
nf_conntrack_proto_dccp.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_proto_generic.c netfilter: conntrack: warn the user if there is a better helper to use 2015-06-12 14:06:24 +02:00
nf_conntrack_proto_gre.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_proto_sctp.c netfilter: nf_ct_sctp: minimal multihoming support 2015-07-30 12:59:25 +02:00
nf_conntrack_proto_tcp.c conntrack: RFC5961 challenge ACK confuse conntrack LAST-ACK transition 2015-05-15 20:50:56 +02:00
nf_conntrack_proto_udp.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_proto_udplite.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_proto.c netfilter: nf_conntrack: remove dead code 2014-01-03 23:41:37 +01:00
nf_conntrack_sane.c
nf_conntrack_seqadj.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_conntrack_sip.c netfilter: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +02:00
nf_conntrack_snmp.c
nf_conntrack_standalone.c netfilter: nf_conntrack: add direction support for zones 2015-08-18 01:22:50 +02:00
nf_conntrack_tftp.c
nf_conntrack_timeout.c
nf_conntrack_timestamp.c netfilter: nf_ct_timestamp: Fix BUG_ON after netns deletion 2013-12-20 14:58:29 +01:00
nf_internals.h netfilter: nf_queue: fix nf_queue_nf_hook_drop() 2015-07-23 16:17:58 +02:00
nf_log_common.c netfilter: bridge: add helpers for fetching physin/outdev 2015-04-08 16:49:08 +02:00
nf_log.c netfilter: nf_log: wait for rcu grace after logger unregistration 2015-09-17 13:37:31 +02:00
nf_nat_amanda.c
nf_nat_core.c netfilter: nf_conntrack: add direction support for zones 2015-08-18 01:22:50 +02:00
nf_nat_ftp.c
nf_nat_helper.c netfilter: nf_conntrack: make sequence number adjustments usuable without NAT 2013-08-28 00:26:48 +02:00
nf_nat_irc.c netfilter: nf_nat: fix access to uninitialized buffer in IRC NAT helper 2014-01-06 14:17:17 +01:00
nf_nat_proto_common.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_dccp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_sctp.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_tcp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_udp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_udplite.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_unknown.c
nf_nat_redirect.c netfilter: combine IPv4 and IPv6 nf_nat_redirect code in one module 2014-11-27 13:08:42 +01:00
nf_nat_sip.c netfilter: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +02:00
nf_nat_tftp.c
nf_queue.c netfilter: nf_queue: fix nf_queue_nf_hook_drop() 2015-07-23 16:17:58 +02:00
nf_sockopt.c netfilter: don't use mutex_lock_interruptible() 2014-08-08 16:47:23 +02:00
nf_synproxy_core.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2015-09-05 21:57:42 -07:00
nf_tables_api.c netfilter: nftables: Only run the nftables chains in the proper netns 2015-07-15 18:17:36 +02:00
nf_tables_core.c netfilter: nftables: Only run the nftables chains in the proper netns 2015-07-15 18:17:36 +02:00
nf_tables_inet.c netfilter: nf_tables: fix error path in the init functions 2014-01-09 23:25:48 +01:00
nf_tables_netdev.c netfilter: nf_tables_netdev: unregister hooks on net_device removal 2015-06-15 23:02:35 +02:00
nfnetlink_acct.c netfilter: nfacct: per network namespace support 2015-08-07 11:50:56 +02:00
nfnetlink_cthelper.c netfilter: Zero the tuple in nfnl_cthelper_parse_tuple() 2015-03-12 13:07:36 +01:00
nfnetlink_cttimeout.c netfilter: cttimeout: allow to set/get default protocol timeouts 2013-10-01 13:17:39 +02:00
nfnetlink_log.c netfilter: Kill unused copies of RCV_SKB_FAIL 2015-06-18 21:14:27 +02:00
nfnetlink_queue_core.c netlink, mmap: fix edge-case leakages in nf queue zero-copy 2015-09-09 21:43:22 -07:00
nfnetlink_queue_ct.c netfilter: nf_conntrack: make sequence number adjustments usuable without NAT 2013-08-28 00:26:48 +02:00
nfnetlink.c netfilter: nfnetlink: work around wrong endianess in res_id field 2015-08-29 01:02:35 +02:00
nft_bitwise.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_byteorder.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_cmp.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_compat.c netfilter: nft_compat: skip family comparison in case of NFPROTO_UNSPEC 2015-09-14 18:10:57 +02:00
nft_counter.c netfilter: nft_counter: convert it to use per-cpu counters 2015-08-07 11:49:48 +02:00
nft_ct.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_dynset.c netfilter: nft_dynset: dynamic stateful expression instantiation 2015-04-13 20:19:55 +02:00
nft_exthdr.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_hash.c netfilter: nf_tables: variable sized set element keys / data 2015-04-13 17:17:31 +02:00
nft_immediate.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_limit.c netfilter: nft_limit: add per-byte limiting 2015-08-07 11:50:50 +02:00
nft_log.c netfilter: nf_tables: get rid of NFT_REG_VERDICT usage 2015-04-13 17:17:07 +02:00
nft_lookup.c netfilter: nf_tables: add flag to indicate set contains expressions 2015-04-13 20:12:32 +02:00
nft_masq.c netfilter: nf_tables: validate hooks in NAT expressions 2015-01-19 14:52:39 +01:00
nft_meta.c net: #ifdefify sk_classid member of struct sock 2015-07-21 16:04:30 -07:00
nft_nat.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_payload.c netfilter: nft_payload: work around vlan header stripping 2015-08-19 08:39:53 +02:00
nft_queue.c netfilter: nf_tables: get rid of NFT_REG_VERDICT usage 2015-04-13 17:17:07 +02:00
nft_rbtree.c netfilter: nf_tables: variable sized set element keys / data 2015-04-13 17:17:31 +02:00
nft_redir.c netfilter: nf_tables: add register parsing/dumping helpers 2015-04-13 17:17:28 +02:00
nft_reject_inet.c netfilter; Add some missing default cases to switch statements in nft_reject. 2015-04-27 13:20:34 -04:00
nft_reject.c netfilter; Add some missing default cases to switch statements in nft_reject. 2015-04-27 13:20:34 -04:00
x_tables.c netfilter: add and use jump label for xt_tee 2015-07-15 18:18:06 +02:00
xt_addrtype.c ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCAST 2015-05-25 13:25:33 -04:00
xt_AUDIT.c netfilter: Convert uses of __constant_<foo> to <foo> 2014-03-13 14:13:19 +01:00
xt_bpf.c net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
xt_cgroup.c netfilter: x_tables: fix cgroup matching on non-full sks 2015-04-01 11:26:42 +02:00
xt_CHECKSUM.c
xt_CLASSIFY.c
xt_cluster.c net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
xt_comment.c
xt_connbytes.c netfilter: Convert pr_warning to pr_warn 2014-09-10 12:40:10 -07:00
xt_connlabel.c netfilter: connlabels: Export setting connlabel length 2015-08-27 11:40:43 -07:00
xt_connlimit.c netfilter: nf_conntrack: push zone object into functions 2015-08-11 12:29:01 +02:00
xt_connmark.c netfilter: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
xt_CONNSECMARK.c
xt_conntrack.c
xt_cpu.c
xt_CT.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2015-09-05 21:57:42 -07:00
xt_dccp.c
xt_devgroup.c
xt_dscp.c
xt_DSCP.c netfilter: fix various sparse warnings 2014-11-13 12:14:42 +01:00
xt_ecn.c
xt_esp.c
xt_hashlimit.c netfilter: Remove checks of seq_printf() return values 2014-11-05 14:11:02 -05:00
xt_helper.c
xt_hl.c
xt_HL.c
xt_HMARK.c net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
xt_IDLETIMER.c netfilter: IDLETIMER: fix lockdep warning 2015-07-13 17:23:25 +02:00
xt_ipcomp.c netfilter: xt_ipcomp: Use ntohs to ease sparse warning 2014-02-19 11:41:25 +01:00
xt_iprange.c
xt_ipvs.c
xt_l2tp.c netfilter: introduce l2tp match extension 2014-01-09 21:36:39 +01:00
xt_LED.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-08-05 18:46:26 -07:00
xt_length.c
xt_limit.c
xt_LOG.c netfilter: xt_LOG: add missing string format in nf_log_packet() 2014-06-28 18:50:35 +02:00
xt_mac.c
xt_mark.c netfilter: xt_MARK: Add ARP support 2015-05-14 13:00:27 +02:00
xt_multiport.c
xt_nat.c
xt_NETMAP.c
xt_nfacct.c netfilter: nfacct: per network namespace support 2015-08-07 11:50:56 +02:00
xt_NFLOG.c
xt_NFQUEUE.c netfilter: xt_NFQUEUE: separate reusable code 2013-12-07 23:20:45 +01:00
xt_osf.c netfilter: xt_osf: Use continue to reduce indentation 2014-12-23 14:20:10 +01:00
xt_owner.c
xt_physdev.c netfilter: physdev: use helpers 2015-04-08 16:49:09 +02:00
xt_pkttype.c
xt_policy.c
xt_quota.c
xt_rateest.c
xt_RATEEST.c net: sched: make bstats per cpu and estimator RCU safe 2014-09-30 01:02:26 -04:00
xt_realm.c
xt_recent.c netfilter: xt_recent: don't reject rule if new hitcount exceeds table max 2015-02-16 17:00:47 +01:00
xt_REDIRECT.c netfilter: combine IPv4 and IPv6 nf_nat_redirect code in one module 2014-11-27 13:08:42 +01:00
xt_repldata.h net: netfilter: LLVMLinux: vlais-netfilter 2014-06-07 11:44:39 -07:00
xt_sctp.c
xt_SECMARK.c
xt_set.c netfilter: ipset: Fix coding styles reported by checkpatch.pl 2015-06-14 10:40:18 +02:00
xt_socket.c netfilter: xt_socket: add XT_SOCKET_RESTORESKMARK flag 2015-06-18 13:05:09 +02:00
xt_state.c
xt_statistic.c net: replace macros net_random and net_srandom with direct calls to prandom 2014-01-14 15:15:25 -08:00
xt_string.c net: Remove state argument from skb_find_text() 2015-02-22 15:59:54 -05:00
xt_tcpmss.c
xt_TCPMSS.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
xt_TCPOPTSTRIP.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
xt_tcpudp.c
xt_TEE.c netfilter: xt_TEE: use IS_ENABLED(CONFIG_NF_DUP_IPV6) 2015-08-21 22:08:41 +02:00
xt_time.c
xt_TPROXY.c inet: inet_twsk_deschedule factorization 2015-07-09 15:12:20 -07:00
xt_TRACE.c
xt_u32.c