rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (14 ticks this GP) idle=7e84/1/0x4000000000000000 softirq=14483/14483 fqs=7
rcu: 	(detected by 1, t=10502 jiffies, g=7637, q=365 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6013 Comm: syz.2.29 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__lock_acquire+0xe3/0xd20
Code: 30 40 0f 93 c6 40 20 ce 40 80 fe 01 0f 84 30 01 00 00 44 89 74 24 1c 89 6c 24 10 44 8b b4 24 88 00 00 00 8b 6c 24 78 41 89 d5 <48> c7 c1 10 73 49 93 48 29 c8 48 c1 f8 03 48 be 29 5c 8f c2 f5 28
RSP: 0018:ffffc90000007750 EFLAGS: 00000097
RAX: ffffffff9349c388 RBX: ffff88804b027a98 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888021651cc0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1009604f51 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fb08b77c6c0(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000028a2c000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_acquire+0x120/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_count_sub+0xf8/0x170
Code: 75 78 83 3d ed c8 13 0e 00 75 19 90 48 c7 c7 60 3f 8a 8b 48 c7 c6 40 40 8a 8b e8 d3 4b f3 ff 90 0f 0b 90 90 90 e9 6d ff ff ff <48> c7 c1 20 03 ac 99 80 e1 07 80 c1 03 38 c1 0f 8c 1a ff ff ff 89
RSP: 0018:ffffc9000465f5d0 EFLAGS: 00000202
RAX: 0000000000000004 RBX: dffffc0000000000 RCX: bffa60741237a000
RDX: 0000000000000001 RSI: ffffffff8dba91a8 RDI: 0000000000000001
RBP: ffff88804b03b528 R08: 0000000000000000 R09: ffffffff822b3a4b
R10: 0000000000000406 R11: 0000000000000002 R12: 0000000000000005
R13: ffff88804b03b530 R14: dffffc0000000000 R15: 0000000000000180
 obj_cgroup_charge_account+0x37b/0x660
 __memcg_slab_post_alloc_hook+0x3e6/0x7f0
 kmem_cache_alloc_lru_noprof+0x2c7/0x3d0
 __d_alloc+0x36/0x7a0
 d_alloc_parallel+0xe5/0x15e0
 path_openat+0xa3b/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb08a98d590
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007fb08b77bf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb08a98d590
RDX: 0000000000000000 RSI: 00007fb08b77bfa0 RDI: 00000000ffffff9c
RBP: 00007fb08b77bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fb08abd6038 R14: 00007fb08abd5fa0 R15: 00007ffc5fda1898
 </TASK>
rcu: rcu_preempt kthread starved for 10488 jiffies! g7637 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:26792 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6020 Comm: syz.2.29 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__sanitizer_cov_trace_pc+0x46/0x70
Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc9000479f418 EFLAGS: 00000246
RAX: ffffffff81b4601b RBX: 1ffff11009608341 RCX: ffff888106ae0000
RDX: ffffc9000964a000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000479f5a0 R08: ffffffff8fa3a637 R09: 1ffffffff1f474c6
R10: dffffc0000000000 R11: fffffbfff1f474c7 R12: ffff88804b041a08
R13: dffffc0000000000 R14: ffff88813663b1c0 R15: 0000000000000000
FS:  00007fb08b73a6c0(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb08b739fc8 CR3: 0000000028a2c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 smp_call_function_many_cond+0xd4b/0x12d0
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f9/0x1130
 __static_call_transform+0x4eb/0x750
 arch_static_call_transform+0x98/0xc0
 __static_call_update+0xe4/0x5d0
 tracepoint_add_func+0x91e/0xa10
 tracepoint_probe_register+0x5d/0x90
 perf_trace_event_init+0x4e1/0x9d0
 perf_trace_init+0x23d/0x2d0
 perf_tp_event_init+0x8d/0x120
 perf_try_init_event+0x17f/0x870
 perf_event_alloc+0x133e/0x2be0
 __se_sys_perf_event_open+0x772/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb08a98ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb08b73a038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fb08abd6180 RCX: 00007fb08a98ec29
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000640
RBP: 00007fb08aa11e41 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb08abd6218 R14: 00007fb08abd6180 R15: 00007ffc5fda1898
 </TASK>
