In __nf_ct_ext_find(), ext->gen_id can be changed by nf_ct_ext_valid_post(), using WRITE_ONCE. Mark data races on ext->gen_id as benign using READ_ONCE. This patch is aimed at reducing the number of benign races reported by KCSAN in order to focus future debugging effort on harmful races. Signed-off-by: linke li <lilinke99@xxxxxx> --- net/netfilter/nf_conntrack_extend.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c index dd62cc12e775..7f1a5e5f6646 100644 --- a/net/netfilter/nf_conntrack_extend.c +++ b/net/netfilter/nf_conntrack_extend.c @@ -141,7 +141,7 @@ void *__nf_ct_ext_find(const struct nf_ct_ext *ext, u8 id) if (!__nf_ct_ext_exist(ext, id)) return NULL; - if (this_id == 0 || ext->gen_id == gen_id) + if (this_id == 0 || READ_ONCE(ext->gen_id) == gen_id) return (void *)ext + ext->offset[id]; return NULL; -- 2.39.3 (Apple Git-146)
