rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=9eac/1/0x4000000000000000 softirq=94778/94778 fqs=4721
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1159159          0            0
rcu: 	cputime:    30435      22039           82   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=79049 q=11463 ncpus=2)
CPU: 1 UID: 0 PID: 21569 Comm: syz.3.4351 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:unwind_next_frame+0x223/0x23c0
Code: 86 78 04 00 00 44 89 f8 4c 8d 2c 85 ec c9 52 91 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 48 89 eb 0f 85 25 1c 00 00 45 8b 6d 00 <44> 89 f8 ff c0 48 8d 2c 85 ec c9 52 91 48 89 e8 48 c1 e8 03 0f b6
RSP: 0018:ffffc90000a08718 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000100
RDX: 00000000000ab29c RSI: ffffffff8c27c9e0 RDI: ffffffff8c27c9a0
RBP: dffffc0000000000 R08: ffffffff81767e95 R09: ffffffff8e75e5e0
R10: ffffc90000a08838 R11: ffffffff81b0c390 R12: ffffffff8baec9d5
R13: 00000000001d7ef8 R14: ffffc90000a087e8 R15: 00000000000aaec9
FS:  00007f7e4f32b6c0(0000) GS:ffff8882a945a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 0000000110596000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x384/0x690
 __alloc_skb+0x27d/0x7d0
 wg_packet_send_keepalive+0x65/0x2c0
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_count_add+0xb9/0x190
Code: 0e 00 85 c0 74 09 31 db 31 ff e8 a2 2a 0e 00 65 4c 8b 35 02 73 88 11 49 81 c6 48 15 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 6d 17 9c 00 49 89 1e 5b 41 5e 41 5f c3 cc cc cc
RSP: 0018:ffffc90003e67b70 EFLAGS: 00000246
RAX: 1ffff1102dff42a9 RBX: ffffffff81a122cc RCX: ffffffff9a27c400
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff81a122cc
RBP: ffff888107828140 R08: ffff8881078280e7 R09: 1ffff11020f0501c
R10: dffffc0000000000 R11: ffffed1020f0501d R12: ffff8881078280e0
R13: dffffc0000000000 R14: ffff88816ffa1548 R15: dffffc0000000000
 up_write+0x10c/0x410
 perf_fasync+0xcd/0x110
 do_vfs_ioctl+0x1117/0x1530
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7e4e39c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7e4f32b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7e4e615fa0 RCX: 00007f7e4e39c819
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007f7e4e432c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e4e616038 R14: 00007f7e4e615fa0 R15: 00007ffd36993738
 </TASK>
sched: DL replenish lagged too much
