rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=e224/1/0x4000000000000000 softirq=25006/25006 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1072344          0            0
rcu: 	cputime:    30500      21999           85   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=18745 q=3559 ncpus=2)
CPU: 0 UID: 0 PID: 8119 Comm: syz.0.655 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:__read_once_word_nocheck+0x3/0x10
Code: b0 00 48 ba 00 00 00 00 00 fc ff df e9 88 fc ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 07 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000007130 EFLAGS: 00000202
RAX: ffffffff81ac50ec RBX: ffffc90002f7f158 RCX: 1ffff92000000e01
RDX: ffffffff9032a89c RSI: 0000000000000002 RDI: ffffc90002f7f158
RBP: 1ffff92000000e42 R08: 0000000000000007 R09: ffffffff8172d195
R10: ffffc90000007258 R11: ffffffff81ac5140 R12: ffffc90002f80000
R13: 1ffff92000000e43 R14: ffffc90000007208 R15: ffffc90002f78000
FS:  00007f97bb08e6c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000060000 CR3: 00000001210ba000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000082
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0xc3c/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 __kfence_alloc+0x2b2/0x3b0
 __kmalloc_noprof+0x440/0x4f0
 ___neigh_create+0x6d5/0x2260
 ip6_finish_output2+0xb4d/0x16a0
 ndisc_send_skb+0xb54/0x1440
 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:unwind_next_frame+0x282/0x2390
Code: 45 a4 c9 2a 90 48 81 fe a2 72 e0 90 0f 83 24 18 00 00 4b 8d 04 40 48 8d 04 45 a4 c9 2a 90 48 3d a2 72 e0 90 0f 87 0c 18 00 00 <45> 39 e8 48 bd 00 00 00 00 00 fc ff df 0f 84 03 02 00 00 4a 8d 14
RSP: 0018:ffffc90002f7eff8 EFLAGS: 00000283
RAX: ffffffff903fcdb8 RBX: dffffc0000000000 RCX: 8d694fbfb47af400
RDX: 00000000000a7ee5 RSI: ffffffff903fcda6 RDI: ffffffff8be34420
RBP: ffffffff90e4cdd8 R08: 00000000000380ae R09: ffffffff8172d195
R10: ffffc90002f7f118 R11: ffffffff81ac5140 R12: ffffffff8216cc00
R13: 00000000000380ab R14: ffffc90002f7f0c8 R15: 00000000000116cc
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __set_page_owner+0x8d/0x4a0
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 alloc_pages_noprof+0xa9/0x190
 skb_page_frag_refill+0x179/0x320
 sk_page_frag_refill+0x4c/0xf0
 kcm_sendmsg+0x6ff/0x2ad0
 __sock_sendmsg+0x21c/0x270
 sock_write_iter+0x258/0x330
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f97ba18ec29
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:00007f97bb08e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f97ba3d5fa0 RCX: 00007f97ba18ec29
RDX: 00000000fffffdef RSI: 0000200000000140 RDI: 0000000000000007
RBP: 00007f97ba211e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f97ba3d6038 R14: 00007f97ba3d5fa0 R15: 00007ffd52124988
 </TASK>
sched: DL replenish lagged too much
