rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=4774/1/0x4000000000000000 softirq=54813/54815 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P11917/1:b..l P11928/1:b..l P11924/1:b..l P13/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=43713, q=349 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11926 Comm: syz.0.1625 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+0x13d/0x360
Code: 00 6a 00 55 ff 74 24 30 e8 e0 02 00 00 48 83 c4 28 48 c7 c7 24 a6 ba 8d e8 e0 bd dd 09 b8 ff ff ff ff 65 0f c1 05 83 bb 03 11 <83> f8 01 0f 85 c9 00 00 00 48 c7 44 24 30 00 00 00 00 9c 8f 44 24
RSP: 0018:ffffc900000068e0 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 6659cae28fed5d00
RDX: 0000000000000000 RSI: ffffffff8dbaa624 RDI: ffffffff8be34480
RBP: ffffffff81cb1cf7 R08: 0000000000000000 R09: ffffffff81cb1cf7
R10: 61625f72656d6974 R11: 6b636f6c2e736573 R12: 0000000000000002
R13: ffffffff8e13a160 R14: 0000000000000000 R15: 0000000000000046
FS:  00007f3b889ed6c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcfd43adfc8 CR3: 000000003a2c0000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 trace_call_bpf+0xd4/0x850
 perf_trace_run_bpf_submit+0x78/0x170
 perf_trace_lock+0x2f8/0x3b0
 lock_release+0x3b2/0x3e0
 _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+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_release+0x2b5/0x3e0
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 cb 68 03 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000007470 EFLAGS: 00000206
RAX: 6659cae28fed5d00 RBX: 0000000000000202 RCX: 6659cae28fed5d00
RDX: 0000000000000002 RSI: ffffffff8dbaa624 RDI: ffffffff8be34480
RBP: ffff88801ed58b40 R08: ffffc9000000728f R09: 0000000000000000
R10: ffffc90000007280 R11: ffffffffa0000808 R12: 0000000000000002
R13: 0000000000000002 R14: ffffffff8e13a160 R15: ffff88801ed58000
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x369/0x670
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 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:__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:ffffc900030a76a0 EFLAGS: 00000246
RAX: ffffffff81f01c25 RBX: 0000000000000000 RCX: ffff88801ed58000
RDX: ffffc90023e19000 RSI: 0000000000001c14 RDI: ffffe8ff14687520
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88804b032980
R10: dffffc0000000000 R11: fffff91fe28d0ea9 R12: ffffe8ff14687520
R13: ffffffff8e009240 R14: ffff88804b032980 R15: dffffc0000000000
 perf_trace_run_bpf_submit+0x35/0x170
 perf_trace_lock+0x2f8/0x3b0
 lock_release+0x3b2/0x3e0
 unwind_next_frame+0x19a9/0x2390
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 security_sk_free+0xa4/0x1b0
 __sk_destruct+0x49b/0x660
 caif_release+0x2c6/0x380
 sock_release+0x85/0x150
 __sys_socketpair+0x510/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3b87b8ec29
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:00007f3b889ed038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f3b87dd5fa0 RCX: 00007f3b87b8ec29
RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000025
RBP: 00007f3b87c11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3b87dd6038 R14: 00007f3b87dd5fa0 R15: 00007ffcde4ebb68
 </TASK>
task:kworker/u8:1    state:R  running task     stack:22984 pid:13    tgid:13    ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 3b 7b 03 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000107980 EFLAGS: 00000206
RAX: 1252671c0fdd0b00 RBX: 0000000000000000 RCX: 1252671c0fdd0b00
RDX: 0000000000000000 RSI: ffffffff8dbaa624 RDI: ffffffff8be34480
RBP: ffffffff8b489a62 R08: 0000000000000000 R09: ffffffff8b489a62
R10: ffffc900001077e0 R11: ffffffffa0000808 R12: 0000000000000002
R13: ffffffff8e13a160 R14: 0000000000000000 R15: 0000000000000246
 batadv_nc_worker+0xef/0x610
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
task:rm              state:R  running task     stack:23272 pid:11924 tgid:11924 ppid:11909  task_flags:0x40000c flags:0x00004002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_notrace+0xd1/0x110
 preempt_schedule_notrace_thunk+0x16/0x30
 lock_release+0x3ca/0x3e0
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 kmem_cache_free+0x166/0x400
 __put_anon_vma+0x12b/0x2d0
 unlink_anon_vmas+0x503/0x670
 free_pgtables+0x57a/0x9c0
 exit_mmap+0x444/0xb50
 __mmput+0x118/0x430
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb512396a90
RSP: 002b:00007ffee6587f48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fb512487860 RCX: 00007fb512396a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00007fb512487860 R08: 00007ffee6587dc0 R09: 00007ffee6587ea0
R10: 00007ffee6587e00 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb51248b658 R15: 0000000000000001
 </TASK>
task:syz.9.1624      state:R  running task     stack:25456 pid:11928 tgid:11927 ppid:11661  task_flags:0x400140 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_notrace+0xd1/0x110
 preempt_schedule_notrace_thunk+0x16/0x30
 lock_release+0x3ca/0x3e0
 kernfs_root+0x1e5/0x230
 kernfs_add_one+0x2f5/0x520
 __kernfs_create_file+0x22b/0x2e0
 sysfs_add_file_mode_ns+0x238/0x300
 internal_create_group+0x66d/0x1110
 sysfs_create_groups+0x59/0x120
 net_rx_queue_update_kobjects+0x283/0x740
 netdev_register_kobject+0x21f/0x310
 register_netdevice+0x126c/0x1ae0
 __ip_tunnel_create+0x3e7/0x560
 ip_tunnel_ctl+0x4dd/0xc30
 ipgre_tunnel_ctl+0x2ef/0x5c0
 ip_tunnel_siocdevprivate+0xf5/0x180
 dev_ifsioc+0xb57/0xf00
 dev_ioctl+0x84c/0x1150
 sock_ioctl+0x719/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f672f18ec29
RSP: 002b:00007f672ff44038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f672f3d5fa0 RCX: 00007f672f18ec29
RDX: 0000200000000080 RSI: 00000000000089f1 RDI: 000000000000000a
RBP: 00007f672f211e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f672f3d6038 R14: 00007f672f3d5fa0 R15: 00007ffdedd3b568
 </TASK>
task:syz.2.1620      state:R  running task     stack:23912 pid:11917 tgid:11916 ppid:11665  task_flags:0x40054c flags:0x00004002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock+0x3f/0x50
 unmap_page_range+0x3a79/0x4370
 unmap_vmas+0x399/0x580
 exit_mmap+0x248/0xb50
 __mmput+0x118/0x430
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcfd358ec29
RSP: 002b:00007fcfd43f0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: fffffffffffffff5 RBX: 00007fcfd37d5fa0 RCX: 00007fcfd358ec29
RDX: 0000000000000090 RSI: 0000200000000180 RDI: 0000000000000005
RBP: 00007fcfd3611e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcfd37d6038 R14: 00007fcfd37d5fa0 R15: 00007ffff561e4e8
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g43713 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:26632 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: 1088 Comm: kworker/u10:3 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
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70
Code: 8b 3d 54 6f fe 0b 48 89 de 5b e9 a3 52 59 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 08 f0 a0 92 65 8b 15 78 2a e1 10 81 e2 00 01 ff 00
RSP: 0018:ffffc90006e47658 EFLAGS: 00000202
RAX: ffffffff81b4665b RBX: 1ffff11009608341 RCX: ffff8881085a0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90006e477e0 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: ffff88804b041a08
R13: dffffc0000000000 R14: ffff88813663b1c0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881a3c11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5122d8440 CR3: 000000000df36000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 smp_call_function_many_cond+0xd4b/0x12d0
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f9/0x1130
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_enable_cpuslocked+0x128/0x250
 static_key_enable+0x1a/0x20
 toggle_allocation_gate+0xad/0x240
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
