rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=b0c4/1/0x4000000000000000 softirq=25083/1361356 fqs=0
rcu: 	(t=10501 jiffies g=17985 q=446 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10500 jiffies! g17985 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=9380
rcu: rcu_preempt kthread starved for 10501 jiffies! g17985 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
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:I stack:26728 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>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8249 Comm: syz.2.694 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_release+0xec/0x3e0
Code: 11 c7 44 24 20 01 00 00 00 83 3d 2e 62 06 0e 00 0f 84 96 01 00 00 41 8b 87 e8 0a 00 00 85 c0 0f 84 1d 01 00 00 4c 89 6c 24 18 <48> 89 5c 24 08 44 8d 60 ff 49 8d af f0 0a 00 00 4d 63 ec 48 89 04
RSP: 0018:ffffc90000007818 EFLAGS: 00000002
RAX: 0000000000000002 RBX: 0000000000000087 RCX: 977e10cb4dc6b300
RDX: 0000000000010000 RSI: ffffffff8d9ce581 RDI: ffffffff8be34280
RBP: ffffc90000007918 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f00 R12: dffffc0000000000
R13: ffffffff81ada91e R14: ffff88804b027a98 R15: ffff88801fd95640
FS:  00007fb8117cd6c0(0000) GS:ffff8880b8612000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe80a235ba8 CR3: 000000003e344000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _raw_spin_unlock_irqrestore+0x70/0x110
 hrtimer_try_to_cancel+0x3be/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:unwind_next_frame+0x348/0x2390
Code: 48 81 fb f0 aa b1 8f 0f 83 48 11 00 00 48 c7 c0 f0 aa b1 8f 49 29 c5 48 c7 c6 78 c2 2a 90 49 c1 fd 02 4a 8d 14 6d 00 00 00 00 <4c> 01 ea 48 01 d2 48 01 f2 48 bd 00 00 00 00 00 fc ff df 0f 84 37
RSP: 0018:ffffc90006b97858 EFLAGS: 00000246
RAX: ffffffff8fdde32c RBX: ffffffff8fdde330 RCX: ffffffff8fdde334
RDX: 0000000000000000 RSI: ffffffff906d16d8 RDI: ffffffff8be34220
RBP: ffffffff8fdde334 R08: 0000000000000001 R09: ffffffff8172d195
R10: ffffc90006b97978 R11: ffffffff81ac4d00 R12: ffffffff84ffea3c
R13: 0000000000000000 R14: ffffc90006b97928 R15: ffffffff8fdde330
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 ref_tracker_alloc+0x17d/0x460
 sk_alloc+0x1b1/0x370
 tipc_sk_create+0x164/0x28e0
 __sock_create+0x4b3/0x9f0
 __sys_socketpair+0x1c5/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb81098eba9
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:00007fb8117cd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007fb810bd5fa0 RCX: 00007fb81098eba9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000000000000001e
RBP: 00007fb810a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000200 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb810bd6038 R14: 00007fb810bd5fa0 R15: 00007fffff098138
 </TASK>
CPU: 1 UID: 0 PID: 8243 Comm: syz.0.693 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:rcu_check_gp_start_stall+0x2/0x470
Code: 8b 54 24 10 45 89 e8 8b 4c 24 08 4c 89 f2 48 8b 34 24 e9 88 f7 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 <41> 56 41 54 53 48 f7 05 7e f3 6c 0c 03 00 00 00 75 10 48 8b 05 75
RSP: 0018:ffffc900001e0bd0 EFLAGS: 00000202
RAX: 0000000000000064 RBX: 000000000000012c RCX: fa1f8136d455fa00
RDX: 0000000000000002 RSI: 0000000000002904 RDI: ffffffff8e13f440
RBP: ffffc900001e0e30 R08: ffffffff8fa3b237 R09: 1ffffffff1f47646
R10: dffffc0000000000 R11: fffffbfff1f47647 R12: dffffc0000000000
R13: 1ffff11026cc75f2 R14: ffff88813663af80 R15: ffffffff8e13f440
FS:  00007f08fd3756c0(0000) GS:ffff8881a3c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001140 CR3: 000000003fd80000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 000000000099060a
Call Trace:
 <IRQ>
 rcu_core+0x5fa/0x1770
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:smp_call_function_many_cond+0xd33/0x12d0
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 b6 63 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 5f 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 45 5f
RSP: 0018:ffffc900071a73a0 EFLAGS: 00000246
RAX: ffffffff81b4621b RBX: 1ffff11009608341 RCX: 0000000000080000
RDX: ffffc90003ac2000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc900071a7520 R08: ffffffff8fa3b237 R09: 1ffffffff1f47646
R10: dffffc0000000000 R11: fffffbfff1f47647 R12: ffff88804b041a08
R13: dffffc0000000000 R14: ffff88813663b1c0 R15: 0000000000000000
 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
 bpf_dispatcher_change_prog+0xacd/0xc90
 bpf_prog_test_run_xdp+0x65d/0x1000
 bpf_prog_test_run+0x2c7/0x340
 __sys_bpf+0x562/0x860
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f08fc58eba9
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:00007f08fd375038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f08fc7d5fa0 RCX: 00007f08fc58eba9
RDX: 0000000000000048 RSI: 0000200000000600 RDI: 000000000000000a
RBP: 00007f08fc611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f08fc7d6038 R14: 00007f08fc7d5fa0 R15: 00007ffc67084fd8
 </TASK>
