From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Ying Xue <ying.xue@windriver.com>,
Jon Maloy <jon.maloy@ericsson.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.19 12/42] tipc: fix lockdep warning when reinitilaizing sockets
Date: Wed, 21 Nov 2018 20:05:48 +0100 [thread overview]
Message-ID: <20181121183148.508759431@linuxfoundation.org> (raw)
In-Reply-To: <20181121183147.869199006@linuxfoundation.org>
4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jon Maloy <donmalo99@gmail.com>
[ Upstream commit adba75be0d23cca92a028749d92c60c8909bbdb3 ]
We get the following warning:
[ 47.926140] 32-bit node address hash set to 2010a0a
[ 47.927202]
[ 47.927433] ================================
[ 47.928050] WARNING: inconsistent lock state
[ 47.928661] 4.19.0+ #37 Tainted: G E
[ 47.929346] --------------------------------
[ 47.929954] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[ 47.930116] swapper/3/0 [HC0[0]:SC1[3]:HE1:SE0] takes:
[ 47.930116] 00000000af8bc31e (&(&ht->lock)->rlock){+.?.}, at: rhashtable_walk_enter+0x36/0xb0
[ 47.930116] {SOFTIRQ-ON-W} state was registered at:
[ 47.930116] _raw_spin_lock+0x29/0x60
[ 47.930116] rht_deferred_worker+0x556/0x810
[ 47.930116] process_one_work+0x1f5/0x540
[ 47.930116] worker_thread+0x64/0x3e0
[ 47.930116] kthread+0x112/0x150
[ 47.930116] ret_from_fork+0x3a/0x50
[ 47.930116] irq event stamp: 14044
[ 47.930116] hardirqs last enabled at (14044): [<ffffffff9a07fbba>] __local_bh_enable_ip+0x7a/0xf0
[ 47.938117] hardirqs last disabled at (14043): [<ffffffff9a07fb81>] __local_bh_enable_ip+0x41/0xf0
[ 47.938117] softirqs last enabled at (14028): [<ffffffff9a0803ee>] irq_enter+0x5e/0x60
[ 47.938117] softirqs last disabled at (14029): [<ffffffff9a0804a5>] irq_exit+0xb5/0xc0
[ 47.938117]
[ 47.938117] other info that might help us debug this:
[ 47.938117] Possible unsafe locking scenario:
[ 47.938117]
[ 47.938117] CPU0
[ 47.938117] ----
[ 47.938117] lock(&(&ht->lock)->rlock);
[ 47.938117] <Interrupt>
[ 47.938117] lock(&(&ht->lock)->rlock);
[ 47.938117]
[ 47.938117] *** DEADLOCK ***
[ 47.938117]
[ 47.938117] 2 locks held by swapper/3/0:
[ 47.938117] #0: 0000000062c64f90 ((&d->timer)){+.-.}, at: call_timer_fn+0x5/0x280
[ 47.938117] #1: 00000000ee39619c (&(&d->lock)->rlock){+.-.}, at: tipc_disc_timeout+0xc8/0x540 [tipc]
[ 47.938117]
[ 47.938117] stack backtrace:
[ 47.938117] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G E 4.19.0+ #37
[ 47.938117] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 47.938117] Call Trace:
[ 47.938117] <IRQ>
[ 47.938117] dump_stack+0x5e/0x8b
[ 47.938117] print_usage_bug+0x1ed/0x1ff
[ 47.938117] mark_lock+0x5b5/0x630
[ 47.938117] __lock_acquire+0x4c0/0x18f0
[ 47.938117] ? lock_acquire+0xa6/0x180
[ 47.938117] lock_acquire+0xa6/0x180
[ 47.938117] ? rhashtable_walk_enter+0x36/0xb0
[ 47.938117] _raw_spin_lock+0x29/0x60
[ 47.938117] ? rhashtable_walk_enter+0x36/0xb0
[ 47.938117] rhashtable_walk_enter+0x36/0xb0
[ 47.938117] tipc_sk_reinit+0xb0/0x410 [tipc]
[ 47.938117] ? mark_held_locks+0x6f/0x90
[ 47.938117] ? __local_bh_enable_ip+0x7a/0xf0
[ 47.938117] ? lockdep_hardirqs_on+0x20/0x1a0
[ 47.938117] tipc_net_finalize+0xbf/0x180 [tipc]
[ 47.938117] tipc_disc_timeout+0x509/0x540 [tipc]
[ 47.938117] ? call_timer_fn+0x5/0x280
[ 47.938117] ? tipc_disc_msg_xmit.isra.19+0xa0/0xa0 [tipc]
[ 47.938117] ? tipc_disc_msg_xmit.isra.19+0xa0/0xa0 [tipc]
[ 47.938117] call_timer_fn+0xa1/0x280
[ 47.938117] ? tipc_disc_msg_xmit.isra.19+0xa0/0xa0 [tipc]
[ 47.938117] run_timer_softirq+0x1f2/0x4d0
[ 47.938117] __do_softirq+0xfc/0x413
[ 47.938117] irq_exit+0xb5/0xc0
[ 47.938117] smp_apic_timer_interrupt+0xac/0x210
[ 47.938117] apic_timer_interrupt+0xf/0x20
[ 47.938117] </IRQ>
[ 47.938117] RIP: 0010:default_idle+0x1c/0x140
[ 47.938117] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 41 54 55 53 65 8b 2d d8 2b 74 65 0f 1f 44 00 00 e8 c6 2c 8b ff fb f4 <65> 8b 2d c5 2b 74 65 0f 1f 44 00 00 5b 5d 41 5c c3 65 8b 05 b4 2b
[ 47.938117] RSP: 0018:ffffaf6ac0207ec8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
[ 47.938117] RAX: ffff8f5b3735e200 RBX: 0000000000000003 RCX: 0000000000000001
[ 47.938117] RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8f5b3735e200
[ 47.938117] RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000000
[ 47.938117] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 47.938117] R13: 0000000000000000 R14: ffff8f5b3735e200 R15: ffff8f5b3735e200
[ 47.938117] ? default_idle+0x1a/0x140
[ 47.938117] do_idle+0x1bc/0x280
[ 47.938117] cpu_startup_entry+0x19/0x20
[ 47.938117] start_secondary+0x187/0x1c0
[ 47.938117] secondary_startup_64+0xa4/0xb0
The reason seems to be that tipc_net_finalize()->tipc_sk_reinit() is
calling the function rhashtable_walk_enter() within a timer interrupt.
We fix this by executing tipc_net_finalize() in work queue context.
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/tipc/discover.c | 19 ++++++++++---------
net/tipc/net.c | 45 +++++++++++++++++++++++++++++++++++++--------
net/tipc/net.h | 2 +-
3 files changed, 48 insertions(+), 18 deletions(-)
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -166,7 +166,8 @@ static bool tipc_disc_addr_trial_msg(str
/* Apply trial address if we just left trial period */
if (!trial && !self) {
- tipc_net_finalize(net, tn->trial_addr);
+ tipc_sched_net_finalize(net, tn->trial_addr);
+ msg_set_prevnode(buf_msg(d->skb), tn->trial_addr);
msg_set_type(buf_msg(d->skb), DSC_REQ_MSG);
}
@@ -300,14 +301,12 @@ static void tipc_disc_timeout(struct tim
goto exit;
}
- /* Trial period over ? */
- if (!time_before(jiffies, tn->addr_trial_end)) {
- /* Did we just leave it ? */
- if (!tipc_own_addr(net))
- tipc_net_finalize(net, tn->trial_addr);
-
- msg_set_type(buf_msg(d->skb), DSC_REQ_MSG);
- msg_set_prevnode(buf_msg(d->skb), tipc_own_addr(net));
+ /* Did we just leave trial period ? */
+ if (!time_before(jiffies, tn->addr_trial_end) && !tipc_own_addr(net)) {
+ mod_timer(&d->timer, jiffies + TIPC_DISC_INIT);
+ spin_unlock_bh(&d->lock);
+ tipc_sched_net_finalize(net, tn->trial_addr);
+ return;
}
/* Adjust timeout interval according to discovery phase */
@@ -319,6 +318,8 @@ static void tipc_disc_timeout(struct tim
d->timer_intv = TIPC_DISC_SLOW;
else if (!d->num_nodes && d->timer_intv > TIPC_DISC_FAST)
d->timer_intv = TIPC_DISC_FAST;
+ msg_set_type(buf_msg(d->skb), DSC_REQ_MSG);
+ msg_set_prevnode(buf_msg(d->skb), tn->trial_addr);
}
mod_timer(&d->timer, jiffies + d->timer_intv);
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -104,6 +104,14 @@
* - A local spin_lock protecting the queue of subscriber events.
*/
+struct tipc_net_work {
+ struct work_struct work;
+ struct net *net;
+ u32 addr;
+};
+
+static void tipc_net_finalize(struct net *net, u32 addr);
+
int tipc_net_init(struct net *net, u8 *node_id, u32 addr)
{
if (tipc_own_id(net)) {
@@ -119,17 +127,38 @@ int tipc_net_init(struct net *net, u8 *n
return 0;
}
-void tipc_net_finalize(struct net *net, u32 addr)
+static void tipc_net_finalize(struct net *net, u32 addr)
{
struct tipc_net *tn = tipc_net(net);
- if (!cmpxchg(&tn->node_addr, 0, addr)) {
- tipc_set_node_addr(net, addr);
- tipc_named_reinit(net);
- tipc_sk_reinit(net);
- tipc_nametbl_publish(net, TIPC_CFG_SRV, addr, addr,
- TIPC_CLUSTER_SCOPE, 0, addr);
- }
+ if (cmpxchg(&tn->node_addr, 0, addr))
+ return;
+ tipc_set_node_addr(net, addr);
+ tipc_named_reinit(net);
+ tipc_sk_reinit(net);
+ tipc_nametbl_publish(net, TIPC_CFG_SRV, addr, addr,
+ TIPC_CLUSTER_SCOPE, 0, addr);
+}
+
+static void tipc_net_finalize_work(struct work_struct *work)
+{
+ struct tipc_net_work *fwork;
+
+ fwork = container_of(work, struct tipc_net_work, work);
+ tipc_net_finalize(fwork->net, fwork->addr);
+ kfree(fwork);
+}
+
+void tipc_sched_net_finalize(struct net *net, u32 addr)
+{
+ struct tipc_net_work *fwork = kzalloc(sizeof(*fwork), GFP_ATOMIC);
+
+ if (!fwork)
+ return;
+ INIT_WORK(&fwork->work, tipc_net_finalize_work);
+ fwork->net = net;
+ fwork->addr = addr;
+ schedule_work(&fwork->work);
}
void tipc_net_stop(struct net *net)
--- a/net/tipc/net.h
+++ b/net/tipc/net.h
@@ -42,7 +42,7 @@
extern const struct nla_policy tipc_nl_net_policy[];
int tipc_net_init(struct net *net, u8 *node_id, u32 addr);
-void tipc_net_finalize(struct net *net, u32 addr);
+void tipc_sched_net_finalize(struct net *net, u32 addr);
void tipc_net_stop(struct net *net);
int tipc_nl_net_dump(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info);
next prev parent reply other threads:[~2018-11-21 19:08 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-21 19:05 [PATCH 4.19 00/42] 4.19.4-stable review Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 01/42] flow_dissector: do not dissect l4 ports for fragments Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 02/42] ibmvnic: fix accelerated VLAN handling Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 03/42] ip_tunnel: dont force DF when MTU is locked Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 04/42] ipv6: fix a dst leak when removing its exception Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 05/42] ipv6: Fix PMTU updates for UDP/raw sockets in presence of VRF Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 06/42] net: bcmgenet: protect stop from timeout Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 07/42] net-gro: reset skb->pkt_type in napi_reuse_skb() Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 08/42] sctp: not allow to set asoc prsctp_enable by sockopt Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 09/42] tcp: Fix SOF_TIMESTAMPING_RX_HARDWARE to use the latest timestamp during TCP coalescing Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 10/42] tg3: Add PHY reset for 5717/5719/5720 in change ring and flow control paths Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 11/42] tipc: dont assume linear buffer when reading ancillary data Greg Kroah-Hartman
2018-11-21 19:05 ` Greg Kroah-Hartman [this message]
2018-11-21 19:05 ` [PATCH 4.19 13/42] tuntap: fix multiqueue rx Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 14/42] net: systemport: Protect stop from timeout Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 15/42] net/sched: act_pedit: fix memory leak when IDR allocation fails Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 16/42] net: sched: cls_flower: validate nested enc_opts_policy to avoid warning Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 17/42] tipc: fix link re-establish failure Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 18/42] net/mlx5e: Dont match on vlan non-existence if ethertype is wildcarded Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 19/42] net/mlx5e: Claim TC hw offloads support only under a proper build config Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 20/42] net/mlx5e: Adjust to max number of channles when re-attaching Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 21/42] net/mlx5e: RX, verify received packet size in Linear Striding RQ Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 22/42] Revert "sctp: remove sctp_transport_pmtu_check" Greg Kroah-Hartman
2018-11-21 19:05 ` [PATCH 4.19 23/42] net/mlx5e: Always use the match level enum when parsing TC rule match Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 24/42] net/mlx5e: Fix selftest for small MTUs Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 25/42] net/mlx5e: Removed unnecessary warnings in FEC caps query Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 26/42] inet: frags: better deal with smp races Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 27/42] l2tp: fix a sock refcnt leak in l2tp_tunnel_register Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 28/42] net/mlx5: IPSec, Fix the SA context hash key Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 29/42] net/mlx5e: IPoIB, Reset QP after channels are closed Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 30/42] net: dsa: mv88e6xxx: Fix clearing of stats counters Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 31/42] net: phy: realtek: fix RTL8201F sysfs name Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 32/42] sctp: define SCTP_SS_DEFAULT for Stream schedulers Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 33/42] net: qualcomm: rmnet: Fix incorrect assignment of real_dev Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 34/42] net: dsa: microchip: initialize mutex before use Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 35/42] sctp: fix strchange_flags name for Stream Change Event Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 36/42] net: phy: mdio-gpio: Fix working over slow can_sleep GPIOs Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 37/42] sctp: not increase streams incnt before sending addstrm_in request Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 38/42] mlxsw: spectrum: Fix IP2ME CPU policer configuration Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 39/42] net: smsc95xx: Fix MTU range Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 40/42] rxrpc: Fix lockup due to no error backoff after ack transmit error Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 41/42] usbnet: smsc95xx: disable carrier check while suspending Greg Kroah-Hartman
2018-11-21 19:06 ` [PATCH 4.19 42/42] Revert "x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation" Greg Kroah-Hartman
2018-11-22 5:26 ` [PATCH 4.19 00/42] 4.19.4-stable review kernelci.org bot
2018-11-22 7:15 ` Harsh Shandilya
2018-11-22 8:24 ` Greg Kroah-Hartman
2018-11-22 16:36 ` Guenter Roeck
2018-11-23 7:16 ` Greg Kroah-Hartman
2018-11-22 20:53 ` Thomas Voegtle
2018-11-22 22:01 ` Thomas Voegtle
2018-11-22 22:30 ` Guenter Roeck
2018-11-23 6:52 ` Greg Kroah-Hartman
2018-11-23 7:45 ` Greg Kroah-Hartman
2018-11-23 12:06 ` Guenter Roeck
2018-11-23 6:51 ` Greg Kroah-Hartman
2018-11-23 15:40 ` Thomas Voegtle
2018-11-23 15:44 ` David Laight
2018-11-23 8:13 ` Naresh Kamboju
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