4.20-stable review patch. If anyone has any objections, please let me know.
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From: Florian Westphal fw@strlen.de
commit a007232066f6839d6f256bab21e825d968f1a163 upstream.
Size and 'next bit' were swapped, this bug could cause worker to reschedule itself even if system was idle.
Fixes: 5c789e131cbb9 ("netfilter: nf_conncount: Add list lock and gc worker, and RCU for init tree search") Reviewed-by: Shawn Bohrer sbohrer@cloudflare.com Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/netfilter/nf_conncount.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/netfilter/nf_conncount.c +++ b/net/netfilter/nf_conncount.c @@ -488,7 +488,7 @@ next: clear_bit(tree, data->pending_trees);
next_tree = (tree + 1) % CONNCOUNT_SLOTS; - next_tree = find_next_bit(data->pending_trees, next_tree, CONNCOUNT_SLOTS); + next_tree = find_next_bit(data->pending_trees, CONNCOUNT_SLOTS, next_tree);
if (next_tree < CONNCOUNT_SLOTS) { data->gc_tree = next_tree;