rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=a734/1/0x4000000000000000 softirq=13648/13651 fqs=5231
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1052234          0            0
rcu: 	cputime:    28212      24276           88   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=6625 q=2834 ncpus=2)
CPU: 0 UID: 0 PID: 6030 Comm: syz.0.61 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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:rcu_read_unlock_special+0x87/0x4c0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 92 37 f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc90000007220 EFLAGS: 00000206
RAX: 6802e14127317000 RBX: 1ffff92000000e4c RCX: 6802e14127317000
RDX: 0000000000000002 RSI: ffffffff8d9986f9 RDI: ffffffff8be29f80
RBP: ffffc90000007320 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f1ee67f36c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000029894000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 is_module_text_address+0x190/0x1e0
 kernel_text_address+0x94/0xe0
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 arp_create+0x189/0x990
 arp_send_dst+0xa7/0x2d0
 arp_solicit+0xc1d/0xe60
 neigh_timer_handler+0xab2/0x1030
 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_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 5b 22 21 f6 e8 96 f5 57 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900042ef6c0 EFLAGS: 00000282
RAX: 6802e14127317000 RBX: 0000000000000000 RCX: 6802e14127317000
RDX: 0000000000000000 RSI: ffffffff8d9986f9 RDI: 0000000000000001
RBP: ffffc900042ef770 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200085ded8
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:alloc_slab_obj_exts+0x0/0xa0
Code: cd 49 89 d5 e8 41 54 0f ff 4c 89 fe 4c 89 ea 89 e9 4c 89 e0 e9 2f ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 55 53 48 89 fb 8b 7f 28 48 8b 03 48 83 f8 ff 74 71 89
RSP: 0018:ffffc900042ef838 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900042ef910 RCX: 0000000000000000
RDX: 0000000000000cc0 RSI: ffff88801b68fa00 RDI: ffffea000433f980
RBP: dffffc0000000000 R08: ffffc900042ef910 R09: 000000004f0c7a68
R10: 000000000000000a R11: ffffffff81acf520 R12: ffffea000433f9b8
R13: 0000000000000000 R14: ffffea000433f980 R15: 000000000433f9c0
 __memcg_slab_post_alloc_hook+0x31e/0x7f0
 kmem_cache_alloc_noprof+0x2bf/0x3c0
 alloc_empty_file+0x55/0x1d0
 path_openat+0x107/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ee598e9a9
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:00007f1ee67f3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1ee5bb5fa0 RCX: 00007f1ee598e9a9
RDX: 00000000001c1341 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f1ee5a10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1ee5bb5fa0 R15: 00007ffce86f7b68
 </TASK>
sched: DL replenish lagged too much
