5.4-stable review patch. If anyone has any objections, please let me know.
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From: Fedor Pchelkin pchelkin@ispras.ru
[ Upstream commit 8df1b40de76979bb8e975201d07b71103d5de820 ]
It's needed to check the return value of lockdep_commit_lock_is_held(), otherwise there's no point in this assertion as it doesn't print any debug information on itself.
Found by Linux Verification Center (linuxtesting.org) with Svace static analysis tool.
Fixes: b04df3da1b5c ("netfilter: nf_tables: do not defer rule destruction via call_rcu") Reported-by: Alexey Khoroshilov khoroshilov@ispras.ru Signed-off-by: Fedor Pchelkin pchelkin@ispras.ru Acked-by: Florian Westphal fw@strlen.de Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/nf_tables_api.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 9e20fb759cb8..54c43f1cceac 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -2823,7 +2823,7 @@ static void nf_tables_rule_destroy(const struct nft_ctx *ctx, static void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule) { - lockdep_commit_lock_is_held(ctx->net); + WARN_ON_ONCE(!lockdep_commit_lock_is_held(ctx->net));
nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE); nf_tables_rule_destroy(ctx, rule); @@ -4173,7 +4173,7 @@ void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, struct nft_set_binding *binding, enum nft_trans_phase phase) { - lockdep_commit_lock_is_held(ctx->net); + WARN_ON_ONCE(!lockdep_commit_lock_is_held(ctx->net));
switch (phase) { case NFT_TRANS_PREPARE_ERROR: