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Message-Id: <1504892748-1605-5-git-send-email-pablo@netfilter.org> Date: Fri, 8 Sep 2017 19:45:43 +0200 From: Pablo Neira Ayuso <pablo@...filter.org> To: netfilter-devel@...r.kernel.org Cc: davem@...emloft.net, netdev@...r.kernel.org Subject: [PATCH 4/9] netfilter: xtables: add scheduling opportunity in get_counters From: Florian Westphal <fw@...len.de> There are reports about spurious softlockups during iptables-restore, a backtrace i saw points at get_counters -- it uses a sequence lock and also has unbounded restart loop. Signed-off-by: Florian Westphal <fw@...len.de> Acked-by: Eric Dumazet <edumazet@...gle.com> Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org> --- net/ipv4/netfilter/arp_tables.c | 1 + net/ipv4/netfilter/ip_tables.c | 1 + net/ipv6/netfilter/ip6_tables.c | 1 + 3 files changed, 3 insertions(+) diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c index e04457198f93..9e2770fd00be 100644 --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -629,6 +629,7 @@ static void get_counters(const struct xt_table_info *t, ADD_COUNTER(counters[i], bcnt, pcnt); ++i; + cond_resched(); } } } diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c index 576cba2b57e9..39286e543ee6 100644 --- a/net/ipv4/netfilter/ip_tables.c +++ b/net/ipv4/netfilter/ip_tables.c @@ -776,6 +776,7 @@ get_counters(const struct xt_table_info *t, ADD_COUNTER(counters[i], bcnt, pcnt); ++i; /* macro does multi eval of i */ + cond_resched(); } } } diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c index 54b1e75eded1..01bd3ee5ebc6 100644 --- a/net/ipv6/netfilter/ip6_tables.c +++ b/net/ipv6/netfilter/ip6_tables.c @@ -795,6 +795,7 @@ get_counters(const struct xt_table_info *t, ADD_COUNTER(counters[i], bcnt, pcnt); ++i; + cond_resched(); } } } -- 2.1.4
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