Mark Tomlinson 175e476b8c netfilter: x_tables: Use correct memory barriers. ... When a new table value was assigned, it was followed by a write memory barrier. This ensured that all writes before this point would complete before any writes after this point. However, to determine whether the rules are unused, the sequence counter is read. To ensure that all writes have been done before these reads, a full memory barrier is needed, not just a write memory barrier. The same argument applies when incrementing the counter, before the rules are read. Changing to using smp_mb() instead of smp_wmb() fixes the kernel panic reported in cc00bcaa58 (which is still present), while still maintaining the same speed of replacing tables. The smb_mb() barriers potentially slow the packet path, however testing has shown no measurable change in performance on a 4-core MIPS64 platform. Fixes: 7f5c6d4f66 ("netfilter: get rid of atomic ops in fast path") Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>		2021-03-15 18:42:01 +01:00
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ipset
nf_conntrack_amanda.h
nf_conntrack_common.h
nf_conntrack_dccp.h
nf_conntrack_ftp.h
nf_conntrack_h323_asn1.h
nf_conntrack_h323_types.h
nf_conntrack_h323.h
nf_conntrack_irc.h
nf_conntrack_pptp.h
nf_conntrack_proto_gre.h
nf_conntrack_sane.h
nf_conntrack_sctp.h
nf_conntrack_sip.h
nf_conntrack_snmp.h
nf_conntrack_tcp.h
nf_conntrack_tftp.h
nf_conntrack_zones_common.h
nfnetlink_acct.h
nfnetlink_osf.h
nfnetlink.h
x_tables.h	netfilter: x_tables: Use correct memory barriers.	2021-03-15 18:42:01 +01:00