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netfilter: nf_tables: adjust lockdep assertions handling

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[ 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>
This commit is contained in:
Fedor Pchelkin 2025-06-24 14:12:15 +03:00 • committed by Greg Kroah-Hartman
commit 3584fa93d1
1 changed files with 2 additions and 2 deletions
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4
net/netfilter/nf_tables_api.c
View file

@ -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: