=============================
[ BUG: Invalid wait context ]
5.7.0-rc6-next-20200519-syzkaller #0 Not tainted
-----------------------------
swapper/0/1 is trying to lock:
ffff8880ae737518 (&pool->lock){..-.}-{3:3}, at: spin_lock include/linux/spinlock.h:353 [inline]
ffff8880ae737518 (&pool->lock){..-.}-{3:3}, at: __queue_work+0x2bf/0x1350 kernel/workqueue.c:1448
other info that might help us debug this:
context-{2:2}
2 locks held by swapper/0/1:
 #0: ffffffff89bd2328 (clocksource_mutex){+.+.}-{4:4}, at: clocksource_done_booting+0x13/0x44 kernel/time/clocksource.c:816
 #1: ffffffff89bc0040 (rcu_read_lock){....}-{1:3}, at: __queue_work+0x175/0x1350 kernel/workqueue.c:1411
stack backtrace:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.7.0-rc6-next-20200519-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 print_lock_invalid_wait_context kernel/locking/lockdep.c:3988 [inline]
 check_wait_context kernel/locking/lockdep.c:4049 [inline]
 __lock_acquire.cold+0x26c/0x458 kernel/locking/lockdep.c:4286
 lock_acquire+0x20e/0x960 kernel/locking/lockdep.c:4915
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:353 [inline]
 __queue_work+0x2bf/0x1350 kernel/workqueue.c:1448
 queue_work_on+0x18b/0x200 kernel/workqueue.c:1517
 tick_nohz_activate kernel/time/tick-sched.c:1244 [inline]
 tick_nohz_activate kernel/time/tick-sched.c:1237 [inline]
 tick_setup_sched_timer+0x20e/0x380 kernel/time/tick-sched.c:1378
 hrtimer_switch_to_hres kernel/time/hrtimer.c:739 [inline]
 hrtimer_run_queues+0x327/0x3e0 kernel/time/hrtimer.c:1746
 run_local_timers+0x49/0x130 kernel/time/timer.c:1798
 update_process_times+0x1e/0x60 kernel/time/timer.c:1725
 tick_periodic+0x79/0x170 kernel/time/tick-common.c:99
 tick_handle_periodic+0x41/0x130 kernel/time/tick-common.c:111
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 smp_apic_timer_interrupt+0x1ad/0x6a0 arch/x86/kernel/apic/apic.c:1105
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:__down_trylock_console_sem+0xff/0x210 kernel/printk/printk.c:238
Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 ff 00 00 00 48 83 3d 71 0c 57 08 00 0f 84 c1 00 00 00 e8 b6 5a 17 00 48 89 df 57 9d <0f> 1f 44 00 00 e8 a7 5a 17 00 31 ff 44 89 e6 e8 3d 5c 17 00 45 85
RSP: 0000:ffffc90000c7fb08 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff8880a958c040 RBX: 0000000000000293 RCX: 1ffffffff18ae6ed
RDX: 0000000000000000 RSI: ffffffff815dc59a RDI: 0000000000000293
RBP: ffffffff815e1d1a R08: 0000000000000001 R09: fffffbfff18ae535
R10: ffffffff8c5729a7 R11: fffffbfff18ae534 R12: 0000000000000000
R13: 0000000000000200 R14: ffffffff89b4d200 R15: 000000000000013f
 console_trylock+0x12/0x90 kernel/printk/printk.c:2336
 console_trylock_spinning kernel/printk/printk.c:1745 [inline]
 vprintk_emit+0x35a/0x810 kernel/printk/printk.c:2021
 vprintk_func+0x8f/0x1a6 kernel/printk/printk_safe.c:386
 printk+0xba/0xed kernel/printk/printk.c:2082
 __clocksource_select.cold+0x79/0xac kernel/time/clocksource.c:778
 clocksource_select kernel/time/clocksource.c:793 [inline]
 clocksource_done_booting+0x35/0x44 kernel/time/clocksource.c:823
 do_one_initcall+0x126/0x820 init/main.c:1198
 do_initcall_level init/main.c:1271 [inline]
 do_initcalls init/main.c:1287 [inline]
 do_basic_setup init/main.c:1307 [inline]
 kernel_init_freeable+0x501/0x5b0 init/main.c:1493
 kernel_init+0xd/0x1bb init/main.c:1398
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
random: fast init done
random: crng init done
random: 7 urandom warning(s) missed due to ratelimiting