rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 ticks this GP) idle=5bec/1/0x4000000000000000 softirq=62735/62735 fqs=1
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P14742/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=53361, q=426 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 14979 Comm: syz.6.3050 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+0x297/0xd20
Code: 24 20 0f 83 5e 0a 00 00 4c 89 6c 24 28 4a 8d 04 ad 00 00 00 00 4c 01 e8 89 f1 81 e1 ff 1f 00 00 ba 00 e0 ff ff 41 23 54 c7 20 <09> ca 41 89 54 c7 20 4d 89 4c c7 08 49 89 5c c7 10 4c 8b 6c 24 68
RSP: 0018:ffffc90000006c50 EFLAGS: 00000006
RAX: 000000000000000a RBX: ffff88804b027ad8 RCX: 0000000000000068
RDX: 00000000000c6000 RSI: 0000000000000068 RDI: ffff88801fcc3a00
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81ae2efb
R10: dffffc0000000000 R11: ffffed1009604f59 R12: 0000000000000000
R13: 0000000000000002 R14: 0000000000000000 R15: ffff88801fcc4530
FS:  00007f812bd836c0(0000) GS:ffff8880b8403000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f812bd82fc8 CR3: 000000002bb6e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000082 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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+0x3b8/0x500
 __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:unwind_next_frame+0x365/0x2390
Code: 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 01 00 00 4c 8d 62 04 <4c> 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 6d 19 00
RSP: 0018:ffffc900000075d8 EFLAGS: 00000282
RAX: ffffffff9031623c RBX: ffffffff90316240 RCX: ffffffff90316244
RDX: ffffffff90da8d16 RSI: ffffffff90da8d16 RDI: ffffffff8c03d480
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff81742d25
R10: ffffc900000076f8 R11: ffffffff81acd5c0 R12: ffffffff90da8d1a
R13: 0000000000000000 R14: ffffc900000076a8 R15: ffffffff90316240
 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+0x433/0x710
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 wg_packet_send_keepalive+0x65/0x2c0
 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:__memcg_slab_post_alloc_hook+0x82/0x7d0
Code: df 65 4c 8b 3c 25 08 d0 c1 92 4d 8d b7 90 16 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 f1 ef f7 ff 4d 8b 36 <4d> 85 f6 0f 85 18 06 00 00 49 81 c7 98 16 00 00 4c 89 f8 48 c1 e8
RSP: 0018:ffffc90002acf990 EFLAGS: 00000246
RAX: 1ffff11003f98a12 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000500dc0 RSI: 0000000000000000 RDI: ffff88801ac4b3c0
RBP: 0000000000500dc0 R08: ffffc90002acfa78 R09: 0000000000000000
R10: ffff888114ff0000 R11: fffffbfff1f8684f R12: dffffc0000000000
R13: ffff88801ac4b3c0 R14: 0000000000000000 R15: ffff88801fcc3a00
 __kmalloc_cache_noprof+0x42f/0x6f0
 bpf_prog_alloc_no_stats+0xdb/0x4d0
 bpf_prog_alloc+0x3c/0x1a0
 bpf_prog_load+0x735/0x19e0
 __sys_bpf+0x507/0x860
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f812af8ec29
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:00007f812bd83038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f812b1d5fa0 RCX: 00007f812af8ec29
RDX: 0000000000000094 RSI: 00002000000003c0 RDI: 0000000000000005
RBP: 00007f812b011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f812b1d6038 R14: 00007f812b1d5fa0 R15: 00007ffcf63199f8
 </TASK>
task:syz-executor    state:R  running task     stack:21736 pid:14742 tgid:14742 ppid:14735  task_flags:0x400140 flags:0x00080000
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_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 2b bf 23 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:ffffc9000368f110 EFLAGS: 00000206
RAX: 4d54ccb25be87200 RBX: 0000000000000206 RCX: 4d54ccb25be87200
RDX: 0000000000000002 RSI: ffffffff8dd8c8ae RDI: ffffffff8c03d4e0
RBP: ffff88803fe3e280 R08: ffffc9000368f810 R09: 0000000000000000
R10: ffffc9000368f298 R11: fffff520006d1e55 R12: 0000000000000002
R13: 0000000000000002 R14: ffffffff8e33d360 R15: ffff88803fe3d700
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x19b/0x690
 unlink_anon_vmas+0x2cc/0x670
 free_pgtables+0x72b/0x9c0
 exit_mmap+0x43c/0xb40
 __mmput+0x118/0x430
 copy_process+0x293a/0x3c20
 kernel_clone+0x21e/0x840
 __x64_sys_clone+0x185/0x1e0
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0d55385493
RSP: 002b:00007ffe23a63318 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0d55385493
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055558c74d7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000061eba R15: 00007ffe23a634b0
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g53361 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:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
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+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 13849 Comm: syz-executor 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:smp_call_function_many_cond+0xd33/0x12d0
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 26 73 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 d1 6e 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 b5 6e
RSP: 0018:ffffc90006517540 EFLAGS: 00000293
RAX: ffffffff81b4e79b RBX: 1ffff11009608441 RCX: ffff88801fed5700
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900065176c0 R08: ffffffff8fc34277 R09: 1ffffffff1f8684e
R10: dffffc0000000000 R11: fffffbfff1f8684f R12: ffff88804b042208
R13: dffffc0000000000 R14: ffff88813663b200 R15: 0000000000000000
FS:  000055556c760500(0000) GS:ffff8881a3a03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f549f3056c0 CR3: 00000000415c4000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 flush_tlb_mm_range+0x6b1/0x12d0
 dup_mmap+0x1594/0x1b10
 copy_mm+0x13c/0x4b0
 copy_process+0x1706/0x3c20
 kernel_clone+0x21e/0x840
 __x64_sys_clone+0x185/0x1e0
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f549e585493
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffca8347d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f549e585493
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055556c7607d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000061ed4 R15: 00007ffca8347eb0
 </TASK>
