rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=d92c/1/0x4000000000000000 softirq=16693/16693 fqs=4745
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   968412          0            0
rcu: 	cputime:    25724      26755          107   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10425 q=4894 ncpus=2)
CPU: 1 UID: 0 PID: 6982 Comm: syz.0.327 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e #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 62 2c 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:ffffc900001e05e0 EFLAGS: 00000206
RAX: 4c7c3acb1442ce00 RBX: 1ffff9200003c0c4 RCX: 4c7c3acb1442ce00
RDX: 0000000000000003 RSI: ffffffff8d998836 RDI: ffffffff8be29f40
RBP: ffffc900001e06d8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f8fba1156c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 0000000030ce6000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/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+0x62/0x70
 kmem_cache_free+0x18f/0x400
 rcu_core+0xca8/0x1710
 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:__rcu_read_unlock+0x7f/0xe0
Code: 00 75 27 43 0f b6 04 3c 84 c0 75 41 8b 03 3d 00 00 00 40 73 0f 5b 41 5c 41 5d 41 5e 41 5f e9 c8 80 c9 09 cc 90 0f 0b 90 eb eb <e8> 6c 00 00 00 eb d2 89 d9 80 e1 07 80 c1 03 38 c1 7c a5 49 89 fe
RSP: 0018:ffffc90002f9f0c8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff888020455a84 RCX: 4c7c3acb1442ce00
RDX: 0000000000000001 RSI: ffffffff8db86553 RDI: ffff888020455640
RBP: dffffc0000000000 R08: ffffc90002f9f9e0 R09: 0000000000000000
R10: ffffc90002f9f218 R11: fffff520005f3e45 R12: 1ffff1100408ab50
R13: ffffc90002f98000 R14: ffff888020455a88 R15: dffffc0000000000
 unwind_next_frame+0x19ae/0x2390
 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
 vma_alloc_folio_noprof+0xe4/0x200
 folio_prealloc+0x30/0x180
 __handle_mm_fault+0x2c88/0x5620
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0x764/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:__put_user_4+0xd/0x20
Code: 66 89 01 31 c9 0f 1f 00 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 1f 00 <89> 01 31 c9 0f 1f 00 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90002f9fe50 EFLAGS: 00010206
RAX: 000000000000000a RBX: 0000000000000000 RCX: 00002000000029c0
RDX: 0000000000000000 RSI: ffffffff8db86553 RDI: ffffffff8be29f40
RBP: 000000000000000a R08: 0000000000000000 R09: ffffffff820bc570
R10: dffffc0000000000 R11: ffffed1003f5c119 R12: 0000000000000000
R13: 00002000000029c0 R14: 0000000000000001 R15: 0000000000000001
 __sys_socketpair+0xb7/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8fb938e9a9
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:00007f8fba115038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f8fb95b5fa0 RCX: 00007f8fb938e9a9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f8fb9410d69 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000029c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8fb95b5fa0 R15: 00007ffc11003f08
 </TASK>
sched: DL replenish lagged too much
