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Date: Thu, 1 Sep 2016 16:26:30 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: John Fastabend <john.fastabend@...il.com>
Cc: eric.dumazet@...il.com, jhs@...atatu.com, davem@...emloft.net,
brouer@...hat.com, xiyou.wangcong@...il.com,
alexei.starovoitov@...il.com, john.r.fastabend@...el.com,
netdev@...r.kernel.org, john.fastabend@...il.com, lkp@...org
Subject: [lkp] [net] c4c75f963d: inconsistent {SOFTIRQ-ON-W} ->
{IN-SOFTIRQ-W} usage.
FYI, we noticed the following commit:
https://github.com/0day-ci/linux John-Fastabend/support-lockless-qdisc/20160824-044640
commit c4c75f963de7196385f3e3a80c03d89923b26ba7 ("net: sched: pfifo_fast use skb_array")
in testcase: boot
on test machine: qemu-system-i386 -enable-kvm -m 256M
caused below changes:
+--------------------------------------------------------------------------+------------+------------+
| | d459d8932c | c4c75f963d |
+--------------------------------------------------------------------------+------------+------------+
| boot_successes | 6 | 3 |
| boot_failures | 4 | 7 |
| genirq:Flags_mismatch_irq##(serial)vs.#(goldfish_pdev_bus) | 4 | 7 |
| message:genirq:Flags_mismatch_irq##(serial)vs.#(goldfish_pdev_bus) | 0.0 | 0.0 |
| pattern:genirq:Flags_mismatch_irq##(serial)vs.#(goldfish_pdev_bus) | 0 | 0 |
| invoked_oom-killer:gfp_mask=0x | 3 | 3 |
| message:invoked_oom-killer:gfp_mask=0x | 0.0 | 0.0 |
| pattern:invoked_oom-killer:gfp_mask=0x | 0 | 0 |
| Mem-Info | 3 | 3 |
| message:Mem-Info | 0.0 | 0.0 |
| pattern:Mem-Info | 0 | 0 |
| page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_NORETRY) | 1 | 2 |
| message:page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_NORETRY) | 0.0 | 0.0 |
| pattern:page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_NORETRY) | 0 | 0 |
| warn_alloc_failed+0x | 1 | 2 |
| message:warn_alloc_failed+0x | 0.0 | 0.0 |
| pattern:warn_alloc_failed+0x | 0 | 0 |
| BUG:kernel_reboot-without-warning_in_test_stage | 1 | 1 |
| message:BUG:kernel_reboot-without-warning_in_test_stage | 0 | 0 |
| pattern:BUG:kernel_reboot-without-warning_in_test_stage | 0 | 0 |
| inconsistent{SOFTIRQ-ON-W}->{IN-SOFTIRQ-W}usage | 0 | 6 |
| message:inconsistent{SOFTIRQ-ON-W}->{IN-SOFTIRQ-W}usage | 0 | 0.0 |
| pattern:inconsistent{SOFTIRQ-ON-W}->{IN-SOFTIRQ-W}usage | 0 | 0.0 |
| calltrace:SyS_ioctl | 0 | 6 |
| message:calltrace:SyS_ioctl | 0 | 0.0 |
| pattern:calltrace:SyS_ioctl | 0 | 0 |
| calltrace:schedule_timeout | 0 | 1 |
| message:calltrace:schedule_timeout | 0 | 0.0 |
| pattern:calltrace:schedule_timeout | 0 | 0 |
| calltrace:SyS_execve | 0 | 1 |
| message:calltrace:SyS_execve | 0 | 0.0 |
| pattern:calltrace:SyS_execve | 0 | 0 |
+--------------------------------------------------------------------------+------------+------------+
[ 38.736548] =================================
[ 38.738214] [ INFO: inconsistent lock state ]
[ 38.739821] 4.8.0-rc2-00595-gc4c75f9 #1 Tainted: G S
[ 38.741866] ---------------------------------
[ 38.743472] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[ 38.745526] seq/980 [HC0[0]:SC1[3]:HE1:SE0] takes:
[ 38.747262] (&(&r->consumer_lock)->rlock){+.?...}, at: [<c1f97d4f>] pfifo_fast_dequeue+0x42/0x10a
[ 38.751394] {SOFTIRQ-ON-W} state was registered at:
[ 38.753420] [<c108e5bc>] __lock_acquire+0x34e/0x1568
[ 38.755723] [<c1090460>] lock_acquire+0x119/0x19e
[ 38.757963] [<c213bc25>] _raw_spin_lock+0x2d/0x5d
[ 38.760217] [<c1f97bd5>] pfifo_fast_reset+0x26/0xaf
[ 38.762489] [<c1f987a9>] qdisc_reset+0x1b/0xd3
[ 38.764644] [<c1f98f07>] dev_deactivate_many+0x265/0x30c
[ 38.767059] [<c1f71f84>] __dev_close_many+0x6e/0xa3
[ 38.769319] [<c1f71fe2>] __dev_close+0x29/0x3a
[ 38.771465] [<c1f76f97>] __dev_change_flags+0x98/0x125
[ 38.773810] [<c1f77046>] dev_change_flags+0x22/0x4f
[ 38.776040] [<c1f8c15f>] dev_ifsioc+0xdc/0x2ce
[ 38.778184] [<c1f8ca15>] dev_ioctl+0x5c7/0x63b
[ 38.780310] [<c1f5da99>] sock_ioctl+0x19e/0x1a8
[ 38.783151] [<c1163c64>] vfs_ioctl+0x1c/0x26
[ 38.785214] [<c11648d6>] do_vfs_ioctl+0x65d/0x6cf
[ 38.787411] [<c1164979>] SyS_ioctl+0x31/0x4a
[ 38.789485] [<c1001441>] do_int80_syscall_32+0x53/0xee
[ 38.791812] [<c213c8cf>] restore_all+0x0/0xf
[ 38.793904] irq event stamp: 2076
[ 38.795470] hardirqs last enabled at (2076): [<c1053e19>] __local_bh_enable_ip+0x9f/0xb8
[ 38.799794] hardirqs last disabled at (2075): [<c1053dcd>] __local_bh_enable_ip+0x53/0xb8
[ 38.803442] softirqs last enabled at (0): [<c104cd30>] copy_process+0x2af/0x14a9
[ 38.807020] softirqs last disabled at (2067): [<c10164b0>] do_softirq_own_stack+0x28/0x2e
[ 38.810579]
[ 38.810579] other info that might help us debug this:
[ 38.813514] Possible unsafe locking scenario:
[ 38.813514]
[ 38.816283] CPU0
[ 38.817553] ----
[ 38.818870] lock(&(&r->consumer_lock)->rlock);
[ 38.821150] <Interrupt>
[ 38.822490] lock(&(&r->consumer_lock)->rlock);
[ 38.824842]
[ 38.824842] *** DEADLOCK ***
[ 38.824842]
[ 38.827961] 3 locks held by seq/980:
[ 38.829604] #0: (((&port->ip4_own_query.timer))){+.-...}, at: [<c10afd01>] call_timer_fn+0x0/0x2b7
[ 38.834182] #1: (&(&br->multicast_lock)->rlock){+.-...}, at: [<c205b3f9>] br_ip4_multicast_port_query_expired+0x1c/0x52
[ 38.840020] #2: (rcu_read_lock_bh){......}, at: [<c1f7441c>] __dev_queue_xmit+0x4e/0x746
[ 38.844392]
[ 38.844392] stack backtrace:
[ 38.846691] CPU: 0 PID: 980 Comm: seq Tainted: G S 4.8.0-rc2-00595-gc4c75f9 #1
[ 38.850180] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 38.853855] 00000000 00000002 cf5dfd28 c1450dcd c3189840 ca183280 cf5dfd48 c108c978
[ 38.858487] c2665225 c2665118 c26661d5 ca183868 00000004 00000006 cf5dfd70 c108cc4a
[ 38.863137] 00000004 ca17dea4 c108c02c 00000006 ca183280 ca7a6a34 00000001 ca183868
[ 38.868506] Call Trace:
[ 38.869808] [<c1450dcd>] dump_stack+0x75/0xa9
[ 38.871679] [<c108c978>] print_usage_bug+0x223/0x22f
[ 38.873744] [<c108cc4a>] mark_lock+0x2c6/0x4f9
[ 38.875691] [<c108c02c>] ? print_irq_inversion_bug+0x196/0x196
[ 38.878055] [<c108e549>] __lock_acquire+0x2db/0x1568
[ 38.880145] [<c1036d5d>] ? kvm_clock_read+0x1f/0x30
[ 38.882209] [<c1036d83>] ? kvm_sched_clock_read+0x9/0x18
[ 38.884403] [<c1090460>] lock_acquire+0x119/0x19e
[ 38.886426] [<c1f97d4f>] ? pfifo_fast_dequeue+0x42/0x10a
[ 38.888629] [<c213bc25>] _raw_spin_lock+0x2d/0x5d
[ 38.890638] [<c1f97d4f>] ? pfifo_fast_dequeue+0x42/0x10a
[ 38.893545] [<c1f97d4f>] pfifo_fast_dequeue+0x42/0x10a
[ 38.895645] [<c1f98400>] __qdisc_run+0x14b/0x29a
[ 38.897618] [<c1f74717>] __dev_queue_xmit+0x349/0x746
[ 38.899749] [<c1f74b23>] dev_queue_xmit+0xf/0x11
[ 38.901752] [<c20524af>] br_dev_queue_push_xmit+0x115/0x125
[ 38.904028] [<c205b2b8>] __br_multicast_send_query+0x1fc/0x28c
[ 38.906418] [<c108b207>] ? save_trace+0x39/0x8e
[ 38.908400] [<c205239a>] ? br_fdb_external_learn_del+0xd4/0xd4
[ 38.910738] [<c205b3b0>] br_multicast_send_query+0x68/0x95
[ 38.912984] [<c2130008>] ? switchdev_port_obj_add_now+0x16/0xac
[ 38.915345] [<c205b423>] br_ip4_multicast_port_query_expired+0x46/0x52
[ 38.917878] [<c205b3dd>] ? br_multicast_send_query+0x95/0x95
[ 38.920174] [<c10afe0b>] call_timer_fn+0x10a/0x2b7
[ 38.922204] [<c205b3dd>] ? br_multicast_send_query+0x95/0x95
[ 38.924497] [<c10b010f>] expire_timers+0x157/0x1b7
[ 38.926510] [<c10b0239>] run_timer_softirq+0x5a/0xd6
[ 38.928565] [<c10538f8>] ? _local_bh_enable+0x40/0x40
[ 38.930688] [<c1053a71>] __do_softirq+0x179/0x3b3
[ 38.932725] [<c10538f8>] ? _local_bh_enable+0x40/0x40
[ 38.935557] [<c10164b0>] do_softirq_own_stack+0x28/0x2e
[ 38.937691] <IRQ> [<c1053ece>] irq_exit+0x42/0x8f
[ 38.939887] [<c1030a5b>] smp_apic_timer_interrupt+0x38/0x42
[ 38.942157] [<c213d332>] apic_timer_interrupt+0x32/0x40
[ 38.944340] [<c10906a3>] ? lock_release+0x1be/0x4cd
[ 38.947117] [<c1089866>] up_read+0x1b/0x2e
[ 38.948899] [<c1039720>] __do_page_fault+0x325/0x3d1
[ 38.950994] [<c1039ade>] trace_do_page_fault+0x182/0x22c
[ 38.953173] [<c1036ae9>] ? kvm_read_and_reset_pf_reason+0x28/0x28
[ 38.955607] [<c1036b11>] do_async_page_fault+0x28/0x50
[ 38.957777] [<c213d79f>] error_code+0x5f/0x70
[ 38.959670] [<c1036ae9>] ? kvm_read_and_reset_pf_reason+0x28/0x28
Thanks,
Xiaolong
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