Sebastian Andrzej Siewior a1f1acb9c5 netfilter: nf_dup{4, 6}: Move duplication check to task_struct ...

nf_skb_duplicated is a per-CPU variable and relies on disabled BH for its
locking. Without per-CPU locking in local_bh_disable() on PREEMPT_RT
this data structure requires explicit locking.

Due to the recursion involved, the simplest change is to make it a
per-task variable.

Move the per-CPU variable nf_skb_duplicated to task_struct and name it
in_nf_duplicate. Add it to the existing bitfield so it doesn't use
additional memory.

Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ben Segall <bsegall@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Valentin Schneider <vschneid@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

2025-05-23 13:57:12 +02:00

..

arp_tables.c

netfilter: Use kmemdup_array instead of kmemdup for multiple allocation

2024-09-03 10:47:16 +02:00

arpt_mangle.c

netfilter: ipv4: prefer skb_ensure_writable

2019-05-31 18:02:46 +02:00

arptable_filter.c

netfilter: arp_tables: allow use of arpt_do_table as hookfn

2021-10-14 23:06:53 +02:00

ip_tables.c

netfilter: nf_dup{4, 6}: Move duplication check to task_struct

2025-05-23 13:57:12 +02:00

ipt_ah.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19 17:09:55 +02:00

ipt_ECN.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2019-06-22 08:59:24 -04:00

ipt_REJECT.c

netfilter: use actual socket sk for REJECT action

2020-12-01 14:33:55 +01:00

ipt_rpfilter.c

netfilter: rpfilter: Convert rpfilter_mt() to dscp_t.

2024-11-15 11:00:29 +01:00

ipt_SYNPROXY.c

netfilter: Add MODULE_DESCRIPTION entries to kernel modules

2020-06-25 00:50:31 +02:00

iptable_filter.c

netfilter: use NF_DROP instead of -NF_DROP

2024-05-06 16:29:21 +02:00

iptable_mangle.c

netfilter: xt_mangle: only check verdict part of return value

2023-10-18 10:26:43 +02:00

iptable_nat.c

netfilter: iptables: Fix null-ptr-deref in iptable_nat_table_init().

2024-07-31 23:20:50 +02:00

iptable_raw.c

netfilter: add missing module descriptions

2023-11-08 13:52:32 +01:00

iptable_security.c

netfilter: iptables: allow use of ipt_do_table as hookfn

2021-10-14 23:06:53 +02:00

Kconfig

netfilter: Make legacy configs user selectable

2024-10-15 10:00:24 +02:00

Makefile

netfilter: xtables: allow xtables-nft only builds

2024-01-29 15:43:21 +01:00

nf_defrag_ipv4.c

netfilter: add missing module descriptions

2023-11-08 13:52:32 +01:00

nf_dup_ipv4.c

netfilter: nf_dup{4, 6}: Move duplication check to task_struct

2025-05-23 13:57:12 +02:00

nf_nat_h323.c

netfilter: nat: move repetitive nat port reserve loop to a helper

2022-09-07 16:46:04 +02:00

nf_nat_pptp.c

netfilter: conntrack: pptp: use single option structure

2022-02-04 06:30:28 +01:00

nf_nat_snmp_basic_main.c

netfilter: ipv4: prefer skb_ensure_writable

2019-05-31 18:02:46 +02:00

nf_nat_snmp_basic.asn1

treewide: Add SPDX identifier to IETF ASN.1 modules

2023-10-27 18:04:28 +08:00

nf_reject_ipv4.c

netfilter: nf_reject: Fix build warning when CONFIG_BRIDGE_NETFILTER=n

2024-09-26 13:03:02 +02:00

nf_socket_ipv4.c

tcp: Access &tcp_hashinfo via net.

2022-09-20 10:21:49 -07:00

nf_tproxy_ipv4.c

netfilter: tproxy: bail out if IP has been disabled on the device

2024-05-29 00:37:51 +02:00

nft_dup_ipv4.c

netfilter: nf_tables: pass context structure to nft_parse_register_load

2024-08-20 12:37:24 +02:00

nft_fib_ipv4.c

netfilter: nf_tables: nft_fib: consistent l3mdev handling

2025-05-23 13:57:09 +02:00

nft_reject_ipv4.c

netfilter: nf_tables: do not reduce read-only expressions

2022-03-20 00:29:46 +01:00