rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=7c7c/1/0x4000000000000000 softirq=28793/28794 fqs=5229
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1325611          0            0
rcu: 	cputime:     7627      44852           35   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=26885 q=7652 ncpus=2)
CPU: 0 UID: 0 PID: 8264 Comm: syz.1.666 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_start+0x524/0x660
Code: 72 0c bd 00 48 8b 44 24 08 49 39 07 0f 87 b6 fb ff ff 48 89 df e8 cc d0 ff ff 48 8b 04 24 42 0f b6 04 28 84 c0 75 11 83 3b 00 <4c> 89 f1 0f 85 5b ff ff ff e9 90 fb ff ff 89 d9 80 e1 07 80 c1 03
RSP: 0018:ffffc900000070f0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc90000007148 RCX: 0000000000000100
RDX: 0000000000000006 RSI: ffffffff8e25aa07 RDI: ffff88810f759dc0
RBP: 1ffff92000000e2b R08: ffffc900000071d0 R09: 0000000000000000
R10: ffffc90000007198 R11: fffff52000000e35 R12: 1ffff92000000e2a
R13: dffffc0000000000 R14: ffffc90000007158 R15: ffffc90000007180
FS:  00007f5cdac176c0(0000) GS:ffff88818dc24000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001b428a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0xe3/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0xee/0x8b0
 skb_release_head_state+0x71/0x360
 __kfree_skb+0x24/0x210
 nft_do_chain+0x18d6/0x1b10
 nft_do_chain_inet+0x360/0x4b0
 nf_hook_slow+0xc5/0x220
 ndisc_send_skb+0x14e0/0x1650
 addrconf_rs_timer+0x2d2/0x6c0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x225/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__kernel_text_address+0x0/0x30
Code: c1 03 38 c1 7c c1 48 c7 c7 80 94 32 90 e8 18 58 a4 00 eb b3 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <0f> 1f 40 d6 53 48 89 fb e8 33 00 00 00 48 81 fb 00 f0 9f 91 0f 93
RSP: 0018:ffffc90007c072e0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90007c07350 RCX: 0000000000000046
RDX: 0000000000000003 RSI: ffffffff8e25aa07 RDI: ffffffff81000130
RBP: ffffc90007c07390 R08: ffffc90007c07f38 R09: 0000000000000000
R10: ffffc90007c07358 R11: fffff52000f80e6d R12: ffff88810f759dc0
R13: ffff88810a0d0c00 R14: dffffc0000000000 R15: 1ffff92000f80e6a
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfb/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x2a0/0x5f0
 vm_area_dup+0x28/0x670
 dup_mmap+0x8a2/0x1d90
 copy_mm+0x11a/0x480
 copy_process+0x1e99/0x43f0
 kernel_clone+0x2d7/0x940
 __x64_sys_clone+0x1b6/0x230
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5cd9d9ce59
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:00007f5cdac16fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f5cda015fa0 RCX: 00007f5cd9d9ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000800000
RBP: 00007f5cd9e32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000340 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f5cda016038 R14: 00007f5cda015fa0 R15: 00007fff6720d1e8
 </TASK>
sched: DL replenish lagged too much
