4.14-stable review patch. If anyone has any objections, please let me know.
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From: Pablo Neira Ayuso pablo@netfilter.org
commit ad9d9e85072b668731f356be0a3750a3ba22a607 upstream.
This patch fixes the following splat.
[118709.054937] BUG: using smp_processor_id() in preemptible [00000000] code: test/1571 [118709.054970] caller is nft_update_chain_stats.isra.4+0x53/0x97 [nf_tables] [118709.054980] CPU: 2 PID: 1571 Comm: test Not tainted 4.17.0-rc6+ #335 [...] [118709.054992] Call Trace: [118709.055011] dump_stack+0x5f/0x86 [118709.055026] check_preemption_disabled+0xd4/0xe4
Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/netfilter/nf_tables_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/netfilter/nf_tables_core.c +++ b/net/netfilter/nf_tables_core.c @@ -126,15 +126,15 @@ static noinline void nft_update_chain_st if (!base_chain->stats) return;
+ local_bh_disable(); stats = this_cpu_ptr(rcu_dereference(base_chain->stats)); if (stats) { - local_bh_disable(); u64_stats_update_begin(&stats->syncp); stats->pkts++; stats->bytes += pkt->skb->len; u64_stats_update_end(&stats->syncp); - local_bh_enable(); } + local_bh_enable(); }
struct nft_jumpstack {