rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (1 GPs behind) idle=eebc/1/0x4000000000000000 softirq=58813/58835 fqs=1384
	(detected by 1, t=10505 jiffies, g=76913, q=1978 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18603 Comm: syz-executor.2 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:207
Code: 34 00 5d be 03 00 00 00 e9 86 2f 9e 07 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 39 db 85 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 6f 02 00 a9
RSP: 0018:ffffc90000007da0 EFLAGS: 00000046
RAX: 0000000000010002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffff1100ebd956a RSI: ffffffff89435685 RDI: ffff888075ecab50
RBP: ffff888075ecab40 R08: 0000000000000006 R09: ffff888075ecab40
R10: ffff888075ecab40 R11: 0000000000000001 R12: ffff8880b9a2a540
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888075ecab40
FS:  0000555556b1b400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 000000007b2df000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 rb_insert_color_cached include/linux/rbtree.h:113 [inline]
 rb_add_cached include/linux/rbtree.h:183 [inline]
 timerqueue_add+0x252/0x330 lib/timerqueue.c:40
 enqueue_hrtimer+0x1aa/0x470 kernel/time/hrtimer.c:1091
 __run_hrtimer kernel/time/hrtimer.c:1702 [inline]
 __hrtimer_run_queues+0xc12/0xfb0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 __sysvec_apic_timer_interrupt+0x17c/0x640 arch/x86/kernel/apic/apic.c:1113
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6818
Code: 55 53 65 48 8b 1c 25 80 6f 02 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 62 30 c4 f7 e8 cd a5 f4 f7 fb bf 01 00 00 00 <e8> 92 9d ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 f0 1a c4
RSP: 0018:ffffc900030cfdb8 EFLAGS: 00000246
RAX: 0000000000000007 RBX: ffff8880216b0000 RCX: 1ffffffff1bc50b4
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffed10042d6000 R08: 0000000000000000 R09: 0000000000000000
R10: fffffbfff1bc0ce2 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit+0x31/0x80 kernel/entry/common.c:432
 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:654
RIP: 0010:write_comp_data+0x3c/0x90 kernel/kcov.c:236
Code: 01 00 00 49 89 f8 65 48 8b 14 25 80 6f 02 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 94 15 00 00 85 c0 74 4f 8b 82 70 15 00 00 <83> f8 03 75 44 48 8b 82 78 15 00 00 8b 92 74 15 00 00 48 8b 38 48
RSP: 0018:ffffc900030cfe88 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff816ebc87
RDX: ffff8880216b0000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 1ffff92000619fd5 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff89ef4ca0
R13: ffffffff89ef4cd0 R14: ffffc900030cfec8 R15: 0000000000000000
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1266 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1254 [inline]
 __x64_sys_clock_nanosleep+0x1c7/0x430 kernel/time/posix-timers.c:1254
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fcfb8eaf2d1
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffd8fb96fe0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000229 RCX: 00007fcfb8eaf2d1
RDX: 00007ffd8fb97020 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd8fb970ac R08: 0000000000000000 R09: 00007ffd8fbd4080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000e02f6 R14: 000000000000000f R15: 00007ffd8fb97110
 </TASK>
rcu: rcu_preempt kthread starved for 3585 jiffies! g76913 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:28672 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5194 [inline]
 __schedule+0xbd2/0x55b0 kernel/sched/core.c:6506
 schedule+0xda/0x1b0 kernel/sched/core.c:6582
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1658
 rcu_gp_kthread+0x236/0x360 kernel/rcu/tree.c:1857
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 11922 Comm: kworker/1:11 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: events drain_vmap_area_work
RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline]
RIP: 0010:smp_call_function_many_cond+0x4b5/0x1140 kernel/smp.c:987
Code: 52 48 b9 00 00 00 00 00 fc ff df 48 8b 04 24 49 89 c5 83 e0 07 49 c1 ed 03 49 89 c4 49 01 cd 41 83 c4 03 e8 4d e7 0a 00 f3 90 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 73 0a 00 00 8b 43 08 31
RSP: 0018:ffffc90010f0fa58 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9a42220 RCX: 0000000000000000
RDX: ffff88802ccb1d40 RSI: ffffffff8171acb3 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000003
R13: ffffed1017348445 R14: 0000000000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3c02782fb8 CR3: 000000002729d000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1155
 __purge_vmap_area_lazy+0x1f6/0x1c50 mm/vmalloc.c:1749
 drain_vmap_area_work+0x52/0xe0 mm/vmalloc.c:1799
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>