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Date: Mon, 27 Feb 2017 12:14:39 -0500
From: Dave Jones <davej@...emonkey.org.uk>
To: Linux Kernel <linux-kernel@...r.kernel.org>
Cc: Tejun Heo <tj@...nel.org>
Subject: __queue_work oops.
Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.10.0-think+ #9
task: ffff88017f105440 task.stack: ffffc90000094000
RIP: 0010:__queue_work+0x2d/0x700
RSP: 0018:ffff880507c03df8 EFLAGS: 00010046
RAX: 0000000000000082 RBX: 0000000000000101 RCX: 0000000000000002
RDX: ffff88047bf07c98 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff880507c03e30 R08: 0000000000000001 R09: ffffffff8294bf68
R10: ffff880507c03e58 R11: 0000000000000000 R12: ffff88047bf07ce8
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88047bf07c98
FS: 0000000000000000(0000) GS:ffff880507c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000001c2 CR3: 0000000004e11000 CR4: 00000000001406e0
Call Trace:
<IRQ>
? work_on_cpu+0xb0/0xb0
delayed_work_timer_fn+0x1e/0x20
call_timer_fn+0xbd/0x480
? call_timer_fn+0x5/0x480
? work_on_cpu+0xb0/0xb0
run_timer_softirq+0x1a1/0x700
__do_softirq+0xbf/0x5b1
irq_exit+0xb5/0xc0
smp_apic_timer_interrupt+0x3d/0x50
apic_timer_interrupt+0x97/0xa0
RIP: 0010:cpuidle_enter_state+0x12e/0x400
RSP: 0018:ffffc90000097e40 EFLAGS: 00000202
[CONT START] ORIG_RAX: ffffffffffffff10
RAX: ffff88017f105440 RBX: ffffe8ffffa03dc8 RCX: 0000000000000001
RDX: 20c49ba5e353f7cf RSI: 0000000000000001 RDI: ffff88017f105440
RBP: ffffc90000097e80 R08: cccccccccccccccd R09: 0000000000000018
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000005
R13: ffffffff81eaf198 R14: 0000000000000005 R15: ffffffff81eaf180
</IRQ>
cpuidle_enter+0x17/0x20
call_cpuidle+0x23/0x40
do_idle+0xfb/0x200
cpu_startup_entry+0x71/0x80
start_secondary+0x16a/0x210
start_cpu+0x14/0x14
Code: 44 00 00 55 48 89 e5 41 57 49 89 d7 41 56 41 89 fe 41 55 49 89 f5 41 54 53 48 83 ec 10 89 7d d4 9c 58 f6 c4 02 0f 85 06 04 00 00 <41> f6 85 c2 01 00 00 01 0f 85 22 04 00 00 49 bc eb 83 b5 80 46
Code starting with the faulting instruction
===========================================
0: 41 f6 85 c2 01 00 00 testb $0x1,0x1c2(%r13)
7: 01
8: 0f 85 22 04 00 00 jne 0x430
e: 49 rex.WB
f: bc eb 83 b5 80 mov $0x80b583eb,%esp
14: 46 rex.RX
0000000000003cf0 <__queue_work>:
{
3cf0: e8 00 00 00 00 callq 3cf5 <__queue_work+0x5>
3cf5: 55 push %rbp
3cf6: 48 89 e5 mov %rsp,%rbp
3cf9: 41 57 push %r15
3cfb: 49 89 d7 mov %rdx,%r15
3cfe: 41 56 push %r14
unsigned int req_cpu = cpu;
3d00: 41 89 fe mov %edi,%r14d
{
3d03: 41 55 push %r13
3d05: 49 89 f5 mov %rsi,%r13
3d08: 41 54 push %r12
3d0a: 53 push %rbx
3d0b: 48 83 ec 10 sub $0x10,%rsp
3d0f: 89 7d d4 mov %edi,-0x2c(%rbp)
asm volatile("# __raw_save_flags\n\t"
3d12: 9c pushfq
3d13: 58 pop %rax
WARN_ON_ONCE(!irqs_disabled());
3d14: f6 c4 02 test $0x2,%ah
3d17: 0f 85 06 04 00 00 jne 4123 <__queue_work+0x433>
if (unlikely(wq->flags & __WQ_DRAINING) &&
3d1d: 41 f6 85 c2 01 00 00 testb $0x1,0x1c2(%r13)
So we called __queue_work with a null wq.
Thoughts ?
Dave
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