From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Qian Cai <cai@lca.pw>, Florian Westphal <fw@strlen.de>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Sasha Levin <sashal@kernel.org>,
netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.6 117/149] netfilter: nf_tables: silence a RCU-list warning in nft_table_lookup()
Date: Sat, 11 Apr 2020 19:03:14 -0400 [thread overview]
Message-ID: <20200411230347.22371-117-sashal@kernel.org> (raw)
In-Reply-To: <20200411230347.22371-1-sashal@kernel.org>
From: Qian Cai <cai@lca.pw>
[ Upstream commit 0a6a9515fe390976cd762c52d8d4f446d7a14285 ]
It is safe to traverse &net->nft.tables with &net->nft.commit_mutex
held using list_for_each_entry_rcu(). Silence the PROVE_RCU_LIST false
positive,
WARNING: suspicious RCU usage
net/netfilter/nf_tables_api.c:523 RCU-list traversed in non-reader section!!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by iptables/1384:
#0: ffffffff9745c4a8 (&net->nft.commit_mutex){+.+.}, at: nf_tables_valid_genid+0x25/0x60 [nf_tables]
Call Trace:
dump_stack+0xa1/0xea
lockdep_rcu_suspicious+0x103/0x10d
nft_table_lookup.part.0+0x116/0x120 [nf_tables]
nf_tables_newtable+0x12c/0x7d0 [nf_tables]
nfnetlink_rcv_batch+0x559/0x1190 [nfnetlink]
nfnetlink_rcv+0x1da/0x210 [nfnetlink]
netlink_unicast+0x306/0x460
netlink_sendmsg+0x44b/0x770
____sys_sendmsg+0x46b/0x4a0
___sys_sendmsg+0x138/0x1a0
__sys_sendmsg+0xb6/0x130
__x64_sys_sendmsg+0x48/0x50
do_syscall_64+0x69/0xf4
entry_SYSCALL_64_after_hwframe+0x49/0xb3
Signed-off-by: Qian Cai <cai@lca.pw>
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 | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index d11f1a74d43c9..f09d15e7fe2b2 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -520,7 +520,8 @@ static struct nft_table *nft_table_lookup(const struct net *net,
if (nla == NULL)
return ERR_PTR(-EINVAL);
- list_for_each_entry_rcu(table, &net->nft.tables, list) {
+ list_for_each_entry_rcu(table, &net->nft.tables, list,
+ lockdep_is_held(&net->nft.commit_mutex)) {
if (!nla_strcmp(nla, table->name) &&
table->family == family &&
nft_active_genmask(table, genmask))
--
2.20.1
next prev parent reply other threads:[~2020-04-11 23:43 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-11 23:01 [PATCH AUTOSEL 5.6 001/149] net: hns3: drop the WQ_MEM_RECLAIM flag when allocating WQ Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 002/149] net: wan: wanxl: use allow to pass CROSS_COMPILE_M68k for rebuilding firmware Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 003/149] netfilter: ctnetlink: be more strict when NF_CONNTRACK_MARK is not set Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 004/149] net: axienet: Convert DMA error handler to a work queue Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 005/149] net: phy: probe PHY drivers synchronously Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 011/149] ionic: check for NULL structs on teardown Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 012/149] net: phy: mscc: accept all RGMII species in vsc85xx_mac_if_set Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 017/149] ath11k: Adding proper validation before accessing tx_stats Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 022/149] selftests/bpf: Fix test_progs's parsing of test numbers Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 024/149] net/mlx5: E-Switch, Hold mutex when querying drop counter in legacy mode Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 025/149] libbpf: Ignore incompatible types with matching name during CO-RE relocation Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 028/149] ath10k: use kzalloc to read for ath10k_sdio_hif_diag_read Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 029/149] mwifiex: set needed_headroom, not hard_header_len Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 030/149] Bluetooth: L2CAP: handle l2cap config request during open state Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 032/149] ath10k: fix not registering airtime of 11a station with WMM disable Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 034/149] net: phylink: Add missing Backplane speeds Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 035/149] net/mlx5e: Init ethtool steering for representors Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 037/149] Bluetooth: Fix calculation of SCO handle for packet processing Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 038/149] net: rmnet: add missing module alias Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 041/149] Bluetooth: guard against controllers sending zero'd events Sasha Levin
2020-04-11 23:01 ` [PATCH AUTOSEL 5.6 042/149] libbpf: Fix handling of optional field_name in btf_dump__emit_type_decl Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 050/149] net: hns3: modify an unsuitable print when setting unknown duplex to fibre Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 052/149] net: intel: e1000e: fix possible sleep-in-atomic-context bugs in e1000e_get_hw_semaphore() Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 053/149] net: dsa: bcm_sf2: Also configure Port 5 for 2Gb/sec on 7278 Sasha Levin
2020-04-12 1:16 ` Florian Fainelli
2020-04-17 17:06 ` Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 054/149] sh_eth: check sh_eth_cpu_data::no_tx_cntrs when dumping registers Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 055/149] sh_eth: check sh_eth_cpu_data::cexcr " Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 056/149] sh_eth: check sh_eth_cpu_data::no_xdfar " Sasha Levin
2020-04-12 9:30 ` Sergei Shtylyov
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 057/149] ice: Fix implicit queue mapping mode in ice_vsi_get_qs Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 058/149] ice: Add helper to determine if VF link is up Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 060/149] mt76: mt7615: disable 5 GHz on MT7622 Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 061/149] mt76: fix handling full tx queues in mt76_dma_tx_queue_skb_raw Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 062/149] rtw88: Fix incorrect beamformee role setting Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 067/149] rtw88: 8822c: update power sequence to v16 Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 078/149] ath11k: fix warn-on in disassociation Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 079/149] ath11k: Fixing dangling pointer issue upon peer delete failure Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 080/149] rsi: fix null pointer dereference during rsi_shutdown() Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 084/149] mt76: mt7603: fix input validation issues for powersave-filtered frames Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 096/149] Bluetooth: RFCOMM: fix ODEBUG bug in rfcomm_dev_ioctl Sasha Levin
2020-04-11 23:02 ` [PATCH AUTOSEL 5.6 098/149] ath10k: start recovery process when read int status fail for sdio Sasha Levin
2020-04-11 23:03 ` [PATCH AUTOSEL 5.6 110/149] net: axienet: Propagate failure of DMA descriptor setup Sasha Levin
2020-04-11 23:03 ` [PATCH AUTOSEL 5.6 111/149] brcmfmac: Fix driver crash on USB control transfer timeout Sasha Levin
2020-04-11 23:03 ` [PATCH AUTOSEL 5.6 112/149] brcmfmac: Fix double freeing in the fmac usb data path Sasha Levin
2020-04-11 23:03 ` [PATCH AUTOSEL 5.6 113/149] brcmfmac: fix the incorrect return value in brcmf_inform_single_bss() Sasha Levin
2020-04-11 23:03 ` [PATCH AUTOSEL 5.6 114/149] xfrm: add prep for esp beet mode offload Sasha Levin
2020-04-11 23:03 ` Sasha Levin [this message]
2020-04-11 23:03 ` [PATCH AUTOSEL 5.6 147/149] svcrdma: Fix leak of transport addresses Sasha Levin
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