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Date: Thu, 10 Sep 2020 08:18:27 +0800
From: kernel test robot <lkp@...el.com>
To: Geliang Tang <geliangtang@...il.com>
Cc: Mat Martineau <mathew.j.martineau@...ux.intel.com>,
Matthieu Baerts <matthieu.baerts@...sares.net>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Florian Westphal <fw@...len.de>,
Peter Krystad <peter.krystad@...ux.intel.com>,
Geliang Tang <geliangtang@...il.com>, netdev@...r.kernel.org,
mptcp@...ts.01.org, linux-kernel@...r.kernel.org,
0day robot <lkp@...el.com>, lkp@...ts.01.org
Subject: [mptcp] db71a2f198: WARNING:inconsistent_lock_state
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: db71a2f198fef53a9f710ad5ac475bbdb6aba840 ("[MPTCP][PATCH v2 net 1/2] mptcp: fix subflow's local_id issues")
url: https://github.com/0day-ci/linux/commits/Geliang-Tang/mptcp-fix-subflow-s-local_id-remote_id-issues/20200908-105733
base: https://git.kernel.org/cgit/linux/kernel/git/davem/net.git e1f469cd5866499ac40bfdca87411e1c525a10c7
in testcase: kernel-selftests
version: kernel-selftests-x86_64-e8e8f16e-1_20200807
with following parameters:
group: kselftests-mptcp
test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+----------------------------------------------------------------------------+------------+------------+
| | e1f469cd58 | db71a2f198 |
+----------------------------------------------------------------------------+------------+------------+
| boot_successes | 15 | 8 |
| boot_failures | 2 | 9 |
| Kernel_panic-not_syncing:VFS:Unable_to_mount_root_fs_on_unknown-block(#,#) | 2 | |
| WARNING:inconsistent_lock_state | 0 | 9 |
| inconsistent{SOFTIRQ-ON-W}->{IN-SOFTIRQ-W}usage | 0 | 9 |
| calltrace:asm_call_on_stack | 0 | 9 |
| BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h | 0 | 9 |
+----------------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp@...el.com>
[ 257.607162] WARNING: inconsistent lock state
[ 257.609399] 5.9.0-rc3-00371-gdb71a2f198fef #1 Not tainted
[ 257.611927] --------------------------------
[ 257.614273] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[ 257.617486] kworker/1:2/101 [HC0[0]:SC1[3]:HE1:SE0] takes:
[ 257.620140] ffffffffae1aaa40 (fs_reclaim){+.?.}-{0:0}, at: fs_reclaim_acquire+0x5/0x40
[ 257.623680] {SOFTIRQ-ON-W} state was registered at:
[ 257.626250] lock_acquire+0xaf/0x380
[ 257.628516] fs_reclaim_acquire+0x25/0x40
[ 257.631071] __kmalloc_node+0x60/0x560
[ 257.633350] alloc_cpumask_var_node+0x1b/0x40
[ 257.635850] native_smp_prepare_cpus+0xad/0x292
[ 257.638255] kernel_init_freeable+0x15a/0x2dd
[ 257.640847] kernel_init+0xa/0x122
[ 257.643277] ret_from_fork+0x22/0x30
[ 257.645510] irq event stamp: 89762
[ 257.647888] hardirqs last enabled at (89762): [<ffffffffacf08ef0>] process_backlog+0x1b0/0x260
[ 257.651614] hardirqs last disabled at (89761): [<ffffffffacf08f75>] process_backlog+0x235/0x260
[ 257.655368] softirqs last enabled at (89756): [<ffffffffacfb8598>] ip_finish_output2+0x258/0xa20
[ 257.659186] softirqs last disabled at (89757): [<ffffffffad2010d2>] asm_call_on_stack+0x12/0x20
[ 257.663053]
[ 257.663053] other info that might help us debug this:
[ 257.667675] Possible unsafe locking scenario:
[ 257.667675]
[ 257.672233] CPU0
[ 257.674229] ----
[ 257.676375] lock(fs_reclaim);
[ 257.678563] <Interrupt>
[ 257.680618] lock(fs_reclaim);
[ 257.682673]
[ 257.682673] *** DEADLOCK ***
[ 257.682673]
[ 257.687974] 8 locks held by kworker/1:2/101:
[ 257.690177] #0: ffffa060c7c56938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1bc/0x5a0
[ 257.693771] #1: ffffc2fac0197e58 ((work_completion)(&msk->work)){+.+.}-{0:0}, at: process_one_work+0x1bc/0x5a0
[ 257.697437] #2: ffffa060dd8258e0 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_worker+0x5f/0xac0
[ 257.700972] #3: ffffa061247e2e20 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect+0x23/0x60
[ 257.704558] #4: ffffffffae0c9a40 (rcu_read_lock){....}-{1:2}, at: __ip_queue_xmit+0x5/0x600
[ 257.707957] #5: ffffffffae0c9a40 (rcu_read_lock){....}-{1:2}, at: process_backlog+0x75/0x260
[ 257.711431] #6: ffffffffae0c9a40 (rcu_read_lock){....}-{1:2}, at: ip_local_deliver_finish+0x2c/0x120
[ 257.714689] #7: ffffffffae0c9a40 (rcu_read_lock){....}-{1:2}, at: tcp_rcv_state_process+0x17f/0x981
[ 257.718220]
[ 257.718220] stack backtrace:
[ 257.722396] CPU: 1 PID: 101 Comm: kworker/1:2 Not tainted 5.9.0-rc3-00371-gdb71a2f198fef #1
[ 257.726013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 257.729513] Workqueue: events mptcp_worker
[ 257.732037] Call Trace:
[ 257.734092] <IRQ>
[ 257.736155] dump_stack+0x8d/0xc0
[ 257.738400] mark_lock+0x633/0x7c0
[ 257.740652] ? print_shortest_lock_dependencies+0x40/0x40
[ 257.743499] __lock_acquire+0x954/0xaa0
[ 257.745907] lock_acquire+0xaf/0x380
[ 257.748288] ? fs_reclaim_acquire+0x5/0x40
[ 257.750889] ? mptcp_pm_nl_get_local_id+0x232/0x400
[ 257.753356] fs_reclaim_acquire+0x25/0x40
[ 257.755986] ? fs_reclaim_acquire+0x5/0x40
[ 257.758562] kmem_cache_alloc_trace+0x40/0x460
[ 257.761092] mptcp_pm_nl_get_local_id+0x232/0x400
[ 257.763793] subflow_init_req+0x1c2/0x3a0
[ 257.766127] ? inet_reqsk_alloc+0x21/0x140
[ 257.768560] ? rcu_read_lock_sched_held+0x52/0xa0
[ 257.771236] ? kmem_cache_alloc+0x3b8/0x460
[ 257.773656] tcp_conn_request+0x341/0xe60
[ 257.776117] ? lock_acquire+0xaf/0x380
[ 257.778486] ? tcp_rcv_state_process+0x17f/0x981
[ 257.781114] ? tcp_rcv_state_process+0x1e2/0x981
[ 257.783833] tcp_rcv_state_process+0x1e2/0x981
[ 257.786417] ? tcp_v4_inbound_md5_hash+0x4c/0x160
[ 257.789117] tcp_v4_do_rcv+0xb8/0x200
[ 257.791562] tcp_v4_rcv+0xf94/0x1080
[ 257.793835] ip_protocol_deliver_rcu+0x2d/0x2a0
[ 257.796463] ip_local_deliver_finish+0x8c/0x120
[ 257.799035] ip_local_deliver+0x71/0x220
[ 257.801471] ? rcu_read_lock_held+0x52/0x60
[ 257.803973] ip_rcv+0x57/0x200
[ 257.806218] ? process_backlog+0x75/0x260
[ 257.808714] __netif_receive_skb_one_core+0x87/0xa0
[ 257.811476] process_backlog+0xe7/0x260
[ 257.814050] net_rx_action+0x166/0x480
[ 257.816877] __do_softirq+0xea/0x4eb
[ 257.819171] asm_call_on_stack+0x12/0x20
[ 257.821573] </IRQ>
[ 257.823513] ? ip_finish_output2+0x258/0xa20
[ 257.825923] do_softirq_own_stack+0x78/0xa0
[ 257.828215] do_softirq+0x52/0xa0
[ 257.830335] __local_bh_enable_ip+0xde/0x100
[ 257.832834] ip_finish_output2+0x27c/0xa20
[ 257.835155] ? rcu_read_lock_held+0x52/0x60
[ 257.837334] ? ip_output+0x7f/0x280
[ 257.839546] ip_output+0x7f/0x280
[ 257.841650] __ip_queue_xmit+0x1df/0x600
[ 257.844052] __tcp_transmit_skb+0xa17/0xc80
[ 257.846277] tcp_connect+0x4fe/0x600
[ 257.848421] tcp_v4_connect+0x44e/0x560
[ 257.850615] __inet_stream_connect+0xc5/0x360
[ 257.853019] ? __local_bh_enable_ip+0x81/0x100
[ 257.855302] inet_stream_connect+0x37/0x60
[ 257.857569] __mptcp_subflow_connect+0x195/0x228
[ 257.860107] mptcp_pm_create_subflow_or_signal_addr+0x27d/0x5a0
[ 257.862786] mptcp_worker+0x5e4/0xac0
To reproduce:
# build kernel
cd linux
cp config-5.9.0-rc3-00371-gdb71a2f198fef .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
lkp
View attachment "config-5.9.0-rc3-00371-gdb71a2f198fef" of type "text/plain" (209899 bytes)
View attachment "job-script" of type "text/plain" (5758 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (34036 bytes)
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